[T3] type3-vwtype3.org Digest, Vol 87, Issue 11
Nigel East
nigelgeast at gmail.com
Sat Dec 9 21:29:14 PST 2017
What fuel are you using, is it a methanol blend, If so I would suggest
trying it on Pure Gasoline and see if there is a difference, there is a
possibility the methanol is evaporating off and causing a difference in the
initial fuel mixture that is causing the Ping. this would also account for
the differences in idle speed,
Regards
Nigel
On Sun, Dec 10, 2017 at 5:24 AM, <
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> Today's Topics:
>
> 1. Re: On a 73 T-3 SB fuel injected aut trans pinging .
> (Bobsnotch at aol.com)
> 2. Re: On a 73 T-3 SB fuel injected aut trans pinging . (William J)
> 3. Re: On a 73 T-3 SB fuel injected aut trans pinging . (William J)
> 4. Re: On a 73 T-3 SB fuel injected aut trans pinging . (Keith Park)
> 5. Re: On a 73 T-3 SB fuel injected aut trans pinging . (William J)
> 6. Re: On a 73 T-3 SB fuel injected auto trans pinging
> (Bobsnotch at aol.com)
> 7. Re: On a 73 T-3 SB fuel injected auto trans pinging (Jim Adney)
> 8. Re: On a 73 T-3 SB fuel injected auto trans pinging (William J)
> 9. Re: On a 73 T-3 SB fuel injected aut trans pinging .
> (Bobsnotch at aol.com)
> 10. Re: On a 73 T-3 SB fuel injected aut trans pinging .
> (Bobsnotch at aol.com)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 9 Dec 2017 17:44:28 -0500
> From: Bobsnotch at aol.com
> To: type3 at vwtype3.org
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> Message-ID: <3db069.2312f6a4.475dc14c at aol.com>
> Content-Type: text/plain; charset="us-ascii"
>
> In a message dated 12/9/2017 2:28:59 P.M. Eastern Standard Time,
> catnine09 at dslextreme.com writes:
>
> What it does now is
> start and run at 950 and basically holds that even in drive only with a
> short drop when I shift it into drive or reverse and once warm the idle
> drops to 850 and seems to remain there in drive then in park rises to 950.
>
> I only bring this up not to debate what percentage the air temp sensor
> richens the mix only because doing this changes the way it runs so much .
> I
> have read this was an old techs trick on Rennlist I think.
>
>
> The 100 rpm drop from park/neutral is normal for an AT car. This is because
> of the torque converter loading up to move the vehicle.
>
> I'm beginning to think that maybe you might need to ballast the head temp
> sensor. If it drops too low in resistance, the ECU will continue to lean
> out
> the mix. This might be what you're seeing.
>
> Bob 65 Notch w/Factory Sunroof converted to IRS
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> ------------------------------
>
> Message: 2
> Date: Sat, 9 Dec 2017 15:51:47 -0800
> From: "William J" <catnine09 at dslextreme.com>
> To: <type3 at vwtype3.org>
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> Message-ID: <94B8B479ED2948CCAEDFC1BDEDA58BD2 at acere355056e8b>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
>
> ----- Original Message -----
> From: <Bobsnotch at aol.com>
> To: <type3 at vwtype3.org>
> Sent: Saturday, December 09, 2017 2:44 PM
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
>
>
> > In a message dated 12/9/2017 2:28:59 P.M. Eastern Standard Time,
> > catnine09 at dslextreme.com writes:
> >
> > What it does now is
> > start and run at 950 and basically holds that even in drive only with a
> > short drop when I shift it into drive or reverse and once warm the idle
> > drops to 850 and seems to remain there in drive then in park rises to
> > 950.
> >
> > I only bring this up not to debate what percentage the air temp sensor
> > richens the mix only because doing this changes the way it runs so much
> .
> > I
> > have read this was an old techs trick on Rennlist I think.
> >
> >
> > The 100 rpm drop from park/neutral is normal for an AT car. This is
> > because
> > of the torque converter loading up to move the vehicle.
>
> Yes that I agree is normal .
> >
> > I'm beginning to think that maybe you might need to ballast the head temp
> > sensor. If it drops too low in resistance, the ECU will continue to lean
> > out
> > the mix. This might be what you're seeing.
>
> I did try a 250 ohm resistor a few times yet for some reason it didn't
> help
> . It starts out at 27K ohms cold and last I checked , been a while it
> dropped to 70 ohm hot.
>
> I didn't see a change until I had over 500 ohms then it acted like it does
> now only with the air temp sensor plugged in. It's only a matter of 2
> minutes from a cold engine when the missing begins I can't say if the head
> temp sensor heats up that fast. I haven't gone to the extent of removing
> the
> sensor and heating it in oil to see at what temps it reads what ohm value .
> >From what 've read the reason the engine will not start with it unplugged
> is
> because it causes an over rich condition it seems to indicate the ECU needs
> to see resistance at all times. I just know it will not start or run with
> it
> unplugged. I have pots that I can dial in any where from 0 to 1 K ohm and
> dial in 70 ohm to see what it does yet no way of reading actual head temp.
> Seems all the HTS now are the same part number and are used to cover all
> applications even though there were different ones for bus and T4 and T3's
> .
>
> Rays theory is 70 ohm is below the window of the ECU to read. I'm not sure
> if this is general info or applies to type 4 .
> >
> > Bob 65 Notch w/Factory Sunroof converted to IRS
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> > To unsubscribe or change subscription options, visit:
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> ------------------------------
>
> Message: 3
> Date: Sat, 9 Dec 2017 15:57:16 -0800
> From: "William J" <catnine09 at dslextreme.com>
> To: <type3 at vwtype3.org>
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> Message-ID: <8A02408C6F494192AFA29DC3C56B4A96 at acere355056e8b>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
> If I could call someone with this cell phone and have them listen to the
> change with the sensor in and out of the system it would be impossible to
> miss.
> ----- Original Message -----
> From: "William J" <catnine09 at dslextreme.com>
> To: <type3 at vwtype3.org>
> Sent: Saturday, December 09, 2017 11:28 AM
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
>
>
> > I think it's possible and even probable .
> >
> > There is just one detail I wanted to add. I just want to stress one
> point.
> > I don't recall if I brought this up about when I start the car cold well
> > before the ping thing . The AAR would be open , the idle would be set at
> > 950 , in a minute the idle would rise to 1500 RPM and once in reverse
> drop
> > back down . As soon as I placed it back in park it would hang at 1500 for
> > a while. And not to dwell on the unplugged air temp sensor . I just drove
> > it today and last Thursday with the sensor un plugged and it no longer
> > does this. From what I understand The AAR is only to allow air to bypass
> > the closed throttle plate and the MPS senses this adding more fuel . It's
> > not supposed to increase the RPM that much perhaps a bit yet not 550
> RPM's
> > higher than the set base idle . Since it rises so much it in fact
> advances
> > the timing which it will because of the RPM increase . What it does now
> is
> > start and run at 950 and basically holds that even in drive only with a
> > short drop when I shift it into drive or reverse and once warm the idle
> > drops to 850 and seems to remain there in drive then in park rises to
> 950.
> > About a year ago it would have the 1500 RPM right away and if I let it
> > idle it would stay there for a good 15 to 20 minutes then drop to the 950
> > and begin the erratic miss.
> >
> > I only bring this up not to debate what percentage the air temp sensor
> > richens the mix only because doing this changes the way it runs so much .
> > I have read this was an old techs trick on Rennlist I think . On the
> other
> > end and only by a few people on Samba I am told to adjust the MPS . My
> > thinking is not to mess with the MPS I feel it just work as is . It does
> > not leak and the 2 readings 90 ohm and 350 ohms are when they should be
> > and it's the proper one for my E system..
> >
> > I do agree with a long drive yet based just on what the sensor does and
> > it's not just the idle that smooths out it runs better as I drive it.
> Once
> > I pulled the Dist that was sticking and installed the AH and timed it it
> > lost a bit of pickup that came back with the sensor unplugged. I imagine
> > there is some difference between the two distibutors advanc curve. Yet
> > this did not fix the erratic miss that remained the same.
> >
> > Do I look for a vacuum leak?
> >
> > I am just trying to find out why this is. I'd rather run rich than lean
> > for obvious reasons.
> > ----- Original Message -----
> > From: "Jim Adney" <jadney at vwtype3.org>
> > To: <type3 at vwtype3.org>
> > Sent: Saturday, December 09, 2017 5:10 AM
> > Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> >
> >
> >> On 9 Dec 2017 at 11:18, Dave Hall wrote:
> >>
> >>> I wonder if all this is the car's way of asking you to take it for a
> >>> good
> >>> drive. Unless I'm mixing up two listees, this car isn't driven very
> far
> >>> at
> >>> all.
> >>> I've certainly heard of VW dealers resorting to a good brisk drive in a
> >>> 'grumbling' car that does minimal mileage, just to clear out the
> 'soot'.
> >>> Now the advance is working better, maybe that's worth trying?
> >>
> >> Yes, I'll second that. William has said he never gets the car above 45
> >> mi/hr,
> >> so let's see what a couple hours at 65-70 does.
> >>
> >> --
> >> *******************************
> >> Jim Adney, jadney at vwtype3.org
> >> Madison, Wisconsin, USA
> >> *******************************
> >>
> >> _______________________________________________
> >> VWType3.Org mailing list - type3 at vwtype3.org
> >> To unsubscribe or change subscription options, visit:
> >> http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
> >> If you need more help, contact: gregm at vwtype3.org
> >>
> >
> >
> > ---
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> > To unsubscribe or change subscription options, visit:
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> > If you need more help, contact: gregm at vwtype3.org
> >
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 9 Dec 2017 19:55:33 -0500
> From: "Keith Park" <topnotch at nycap.rr.com>
> To: <type3 at vwtype3.org>
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> Message-ID:
> <mailman.3731.1512867333.15231.type3-vwtype3.org at lists.vwtype3.org
> >
> Content-Type: text/plain; charset="us-ascii"
>
> These cars LOVE highway miles, about 85% of the 160K on my
> Square is highway miles. Take it out, use it a bit at speed
> alot could straighten itself out.
>
> Keith
>
>
> Topnotch Restorations
> topnotch at nycap.rr.com
> http://www.a383ina68.addr.com/radiorest/main.htm
> 71 Squareback "Hothe"
> 65 Notchback "El Baja Rojo"
> 93 RX7 "Redstur"
> 95 Chrysler Cirrus Lxi "Cirstallsalot"
>
> -----Original Message-----
> From: type3-vwtype3.org [mailto:type3-vwtype3.org-
> bounces at lists.vwtype3.org]
> On Behalf Of William J
> Sent: Saturday, December 09, 2017 1:37 PM
> To: type3 at vwtype3.org
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
>
> It's certainly possible . Last time I drove it faster than 45 MPH was 2006
> except one freeway drive in 2015 . I do step on it on main and some side
> streets and keep the auto trans in 2nd gear which is not quite the same
> thing as fully warming it up .
> ----- Original Message -----
> From: "Dave Hall" <dave at hallvw.clara.co.uk>
> To: <type3 at vwtype3.org>
> Sent: Saturday, December 09, 2017 3:18 AM
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
>
>
> >I wonder if all this is the car's way of asking you to take it for a good
> > drive. Unless I'm mixing up two listees, this car isn't driven very far
> > at
> > all.
> > I've certainly heard of VW dealers resorting to a good brisk drive in a
> > 'grumbling' car that does minimal mileage, just to clear out the 'soot'.
> > Now the advance is working better, maybe that's worth trying?
> >
> > Dave
> > UK VW Type 3&4 Club
> > ===================
> >
> > -----Original Message-----
> > From: type3-vwtype3.org
> > [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
> > On Behalf Of Jim Adney
> > Sent: 09 December 2017 04:35
> > To: type3 at vwtype3.org
> > Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> >
> > On 8 Dec 2017 at 15:13, William J wrote:
> >
> > Content removed
> >
> > --
> > *******************************
> > Jim Adney, jadney at vwtype3.org
> > Madison, Wisconsin, USA
> > *******************************
> >
> >
> > ---
> > This email has been checked for viruses by Avast antivirus software.
> > https://www.avast.com/antivirus
> >
> > _______________________________________________
> > VWType3.Org mailing list - type3 at vwtype3.org
> > To unsubscribe or change subscription options, visit:
> > http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
> > If you need more help, contact: gregm at vwtype3.org
> >
>
>
> _______________________________________________
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> To unsubscribe or change subscription options, visit:
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>
>
> ------------------------------
>
> Message: 5
> Date: Sat, 9 Dec 2017 17:21:00 -0800
> From: "William J" <catnine09 at dslextreme.com>
> To: <type3 at vwtype3.org>
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> Message-ID: <97E0766682E44E99BA2FAD5A4BCA5305 at acere355056e8b>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> That may have to be on hold since the entire area around us and most
> freeways are iffy since everything around here is on fire.
> ----- Original Message -----
> From: "Keith Park" <topnotch at nycap.rr.com>
> To: <type3 at vwtype3.org>
> Sent: Saturday, December 09, 2017 4:55 PM
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
>
>
> > These cars LOVE highway miles, about 85% of the 160K on my
> > Square is highway miles. Take it out, use it a bit at speed
> > alot could straighten itself out.
> >
> > Keith
> >
> >
> > Topnotch Restorations
> > topnotch at nycap.rr.com
> > http://www.a383ina68.addr.com/radiorest/main.htm
> > 71 Squareback "Hothe"
> > 65 Notchback "El Baja Rojo"
> > 93 RX7 "Redstur"
> > 95 Chrysler Cirrus Lxi "Cirstallsalot"
> >
> > -----Original Message-----
> > From: type3-vwtype3.org
> > [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
> > On Behalf Of William J
> > Sent: Saturday, December 09, 2017 1:37 PM
> > To: type3 at vwtype3.org
> > Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> >
> > It's certainly possible . Last time I drove it faster than 45 MPH was
> 2006
> > except one freeway drive in 2015 . I do step on it on main and some side
> > streets and keep the auto trans in 2nd gear which is not quite the same
> > thing as fully warming it up .
> > ----- Original Message -----
> > From: "Dave Hall" <dave at hallvw.clara.co.uk>
> > To: <type3 at vwtype3.org>
> > Sent: Saturday, December 09, 2017 3:18 AM
> > Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> >
> >
> >>I wonder if all this is the car's way of asking you to take it for a good
> >> drive. Unless I'm mixing up two listees, this car isn't driven very far
> >> at
> >> all.
> >> I've certainly heard of VW dealers resorting to a good brisk drive in a
> >> 'grumbling' car that does minimal mileage, just to clear out the 'soot'.
> >> Now the advance is working better, maybe that's worth trying?
> >>
> >> Dave
> >> UK VW Type 3&4 Club
> >> ===================
> >>
> >> -----Original Message-----
> >> From: type3-vwtype3.org
> >> [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
> >> On Behalf Of Jim Adney
> >> Sent: 09 December 2017 04:35
> >> To: type3 at vwtype3.org
> >> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> >>
> >> On 8 Dec 2017 at 15:13, William J wrote:
> >>
> >> Content removed
> >>
> >> --
> >> *******************************
> >> Jim Adney, jadney at vwtype3.org
> >> Madison, Wisconsin, USA
> >> *******************************
> >>
> >>
> >> ---
> >> This email has been checked for viruses by Avast antivirus software.
> >> https://www.avast.com/antivirus
> >>
> >> _______________________________________________
> >> VWType3.Org mailing list - type3 at vwtype3.org
> >> To unsubscribe or change subscription options, visit:
> >> http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
> >> If you need more help, contact: gregm at vwtype3.org
> >>
> >
> >
> > _______________________________________________
> > VWType3.Org mailing list - type3 at vwtype3.org
> > To unsubscribe or change subscription options, visit:
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> > If you need more help, contact: gregm at vwtype3.org
> >
> > _______________________________________________
> > VWType3.Org mailing list - type3 at vwtype3.org
> > To unsubscribe or change subscription options, visit:
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> > If you need more help, contact: gregm at vwtype3.org
> >
>
>
>
>
> ------------------------------
>
> Message: 6
> Date: Sat, 9 Dec 2017 20:58:18 -0500
> From: Bobsnotch at aol.com
> To: type3 at vwtype3.org
> Subject: Re: [T3] On a 73 T-3 SB fuel injected auto trans pinging
> Message-ID: <3dcb93.28c8db59.475deeba at aol.com>
> Content-Type: text/plain; charset="utf-8"
>
> In a message dated 12/9/2017 8:30:58 P.M. Eastern Standard Time,
> phil.hof at ostronic.org writes:
>
> Lastly, I?ve said this before, but the late model breather/PVC is
> different than the early style, and I hear that faults can cause vacuum
> leaks that
> might cause at least some of your symptoms. If anyone has a good diagram
> and discussion of how the late PVC system works, we could set this right
> and
> eliminate another variable.
>
> This is the 1 thing that Ray really doesn't like about the 2 cap PCV system
> VW used. It has a bad tendency to open when it wants, and causes a miss.
> What most of the type 4 guys do, is to strip out the guts of the valve,
> and
> add a slug with a drilled hole in it (can't remember what size right off
> hand) in the vac hose to the plenum. What this does is allow you to tune
> around the "constant vacuum leak" of the small hole. I only mention this,
> as
> all of the type 4 engines (bus, T-4, 914) use that same valve set up, and
> have issues with it. I haven't really studied how the VW designed PCV
> system
> really works, but then I've only got 1 t-4 engine here, and it's on carbs.
> The rest of the type 3 engines are all 1 cap breather models, so no real
> PCV
> set up.
>
> I hope this helps.
>
> Bob 65 Notch w/Factory Sunroof converted to IRS
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> ------------------------------
>
> Message: 7
> Date: Sat, 09 Dec 2017 20:12:56 -0600
> From: "Jim Adney" <jadney at vwtype3.org>
> To: type3 at vwtype3.org
> Subject: Re: [T3] On a 73 T-3 SB fuel injected auto trans pinging
> Message-ID: <5A2C9828.25597.3886425A at jadney.vwtype3.org>
> Content-Type: text/plain; charset=US-ASCII
>
> On 9 Dec 2017 at 20:58, Bobsnotch at aol.com wrote:
>
> > This is the 1 thing that Ray really doesn't like about the 2 cap PCV
> > system VW used. It has a bad tendency to open when it wants, and
> > causes a miss. What most of the type 4 guys do, is to strip out the
> > guts of the valve, and add a slug with a drilled hole in it (can't
> > remember what size right off hand) in the vac hose to the plenum. What
> > this does is allow you to tune around the "constant vacuum leak" of
> > the small hole. I only mention this, as all of the type 4 engines
> > (bus, T-4, 914) use that same valve set up, and have issues with it. I
> > haven't really studied how the VW designed PCV system really works, but
> > then I've only got 1 t-4 engine here, and it's on carbs. The rest of
> > the type 3 engines are all 1 cap breather models, so no real PCV set
> > up.
>
> All '72-3 FI Type 3s came with the 2 cap breather system. I've had several
> of
> them and they were all fine. No problems whatsoever. There's already a tiny
> little pinhole where that air enters the IAD, so there's no way for this
> to be
> overwhelming.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
>
>
> ------------------------------
>
> Message: 8
> Date: Sat, 9 Dec 2017 18:16:15 -0800
> From: "William J" <catnine09 at dslextreme.com>
> To: <type3 at vwtype3.org>
> Subject: Re: [T3] On a 73 T-3 SB fuel injected auto trans pinging
> Message-ID: <CFE3F08263CF46348EED4D272175B160 at acere355056e8b>
> Content-Type: text/plain; format=flowed; charset="utf-8";
> reply-type=original
>
>
> ----- Original Message -----
> From: "Phil Hof" <phil.hof at ostronic.org>
> To: <type3-vwtype3.org at lists.vwtype3.org>
> Sent: Saturday, December 09, 2017 12:43 PM
> Subject: Re: [T3] On a 73 T-3 SB fuel injected auto trans pinging
>
>
> > You answered my first thought, which is if the MPS leaks or not. You
> said
> > no., so let?s table the MPS for now.
> >
> > Next, I wonder if your injector tip seals are bad. This would allow air
> > in, causing leanness in any leaking cylinders (and perhaps pinging on
> > that/those cylinders), but because it?s maybe only one of four, and so
> far
> > from the MPS, it may not tip off the MPS much to enrichen things, and
> your
> > ?pull the TS plug? enriches it enough to alleviate the pinging, those it
> > makes the other, non-leaking cylinders run rich.
>
> The pinging stopped once I installed the other dist I rebuilt. I had this
> same issue not the pinging that was new and vever happened before. In 2009
> when this started I replaced the injector seals . It was the last thing I
> did because I had to wait for them to arrive and I had high hopes yet new
> ones didn't help . Before this began all I did was put the heat exchangers
> back on instead of the J pipes. Changed all the fuel lines and filter .
> adjusted the valves , changed the plugs which were Bosch that I had from 97
> , oil change . This was when I joined Samba to see if anyone might know . I
> went as far as to check every single wire ECU umplugged and checked for
> opens or shorts . I replaced vaccum lines nad the PVC hose . I've only put
> a
> little over 2 K miles on it since . It always came down to unplugging that
> sensor . I got another MPS that was never used and it was better. I
> replaced
> the plug wires and cap and rotor , gone over the valves twice in 2016 .
> tightened every single FI connector and the FI to case grounds. . I thought
> with all of this it would improve and at times it did yet never lasted
> long.
> Went through the charging system . Checked for voltage drops . The FI power
> relay is the original as is the fuel pump relay . It's possible I suppose
> the power relay contacts are not allowing full voltage to the ECU , that
> was
> next on my list . I never really had a reason to suspect it it did have
> battery voltage at the ECU last I checked.
> >
> > Lastly, I?ve said this before, but the late model breather/PVC is
> > different than the early style, and I hear that faults can cause vacuum
> > leaks that might cause at least some of your symptoms. If anyone has a
> > good diagram and discussion of how the late PVC system works, we could
> set
> > this right and eliminate another variable. Ot just scan the Samba
> > classified and put in the older, simpler, PVC/breather system.
>
> The PCV system seems to do it's job and to plug off the head ports and PCV
> to IAD pipe wouldn't be that difficult . I only know of two breathers that
> would work . One is the old draft tube and the other requires replacing the
> oil filler tube and dip stick I think there's one that has one nipple on
> the
> one cap breather that connects to the oil bath yet don't know it that's the
> entire venting or if it involves the tube down to the oil filler . I can't
> find much info. If the PCV broke I'd have to figure something out . All it
> needs is a way to vent case pressure without sucking up oil in the process
> .
> >
> > -Phil
> >
> > _______________________________________________
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>
>
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> ------------------------------
>
> Message: 9
> Date: Sat, 9 Dec 2017 21:22:02 -0500
> From: Bobsnotch at aol.com
> To: type3 at vwtype3.org
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> Message-ID: <3dcd7e.6df83fd1.475df44a at aol.com>
> Content-Type: text/plain; charset="us-ascii"
>
> In a message dated 12/9/2017 7:30:54 P.M. Eastern Standard Time,
> catnine09 at dslextreme.com writes:
>
> I did try a 250 ohm resistor a few times yet for some reason it didn't
> help
> . It starts out at 27K ohms cold and last I checked , been a while it
> dropped to 70 ohm hot.
>
> I didn't see a change until I had over 500 ohms then it acted like it does
> now only with the air temp sensor plugged in. It's only a matter of 2
> minutes from a cold engine when the missing begins I can't say if the head
> temp sensor heats up that fast.
> Seems all the HTS now are the same part number and are used to cover all
> applications even though there were different ones for bus and T4 and T3's
> .
>
> Rays theory is 70 ohm is below the window of the ECU to read. I'm not sure
> if this is general info or applies to type 4 .
>
> For your air temps, you should be have a reading of around 22-23K when
> cold. At 27K, your air temp should be around 30*F, which would be very cold
> for So Cal-Hollywood. Your "hot" temp should be above 100 ohms, with it
> "bottoming out" around 125 ohms or so. Anything below that just keeps
> leaning
> out the mixture. This is why I mentioned ballasting the HTS. If you're
> wanting to err on the rich side, a 400 or even a 500 ohm resister is what
> you'd
> want to put in line with the HTS.
> Yes, all of the new HTS's that are available now are the same build, and
> now are used on all air cooled VWs. It's not ideal, but they do kind of
> work. What you really want to do is check the resistance range before
> installing, as it might need ballast right out of the box. It's a real
> shame Denso
> doesn't make a replacement of them, as the quality might be better (more
> like the older Bosch units) than what's available today.
>
> What Ray's theory is that 70 is below the threshold is from studying the
> Bosch books, and working with D-jet (both in t-4 and t-3 ) applications.
> There's info out there, but a majority is for the 914 (uses the same
> system
> basically), as those owners WANT to keep the D-Jet FI working
> correctly.Plus,
> they have the cash to have specialized parts made to do so. I'm not saying
> VW people can't have the parts made, but rather most give up and go to
> carbs because it's easier to do so.Plus, they're not "concourse" type of
> vehicles like Porsche or Mercedees people show at special events.
>
>
> Bob 65 Notch w/Factory Sunroof converted to IRS
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> ------------------------------
>
> Message: 10
> Date: Sat, 9 Dec 2017 21:24:38 -0500
> From: Bobsnotch at aol.com
> To: type3 at vwtype3.org
> Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .
> Message-ID: <3dcdd0.494dbfb8.475df4e6 at aol.com>
> Content-Type: text/plain; charset="us-ascii"
>
> In a message dated 12/9/2017 7:55:54 P.M. Eastern Standard Time,
> fisherfarms at gmail.com writes:
>
> My '69 FI/AT 1600 never seems to vary more than about 50 rpm?
>
> Yeah, but Mike your car gets tuned by Tram when it acts up. It's also got
> the more "primitive" FI system, versus what William is dealing with.
>
> Bob 65 Notch w/Factory Sunroof converted to IRS
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> End of type3-vwtype3.org Digest, Vol 87, Issue 11
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