[T3] Two Tests

Thu Sep 19 09:48:12 PDT 2019

Any thoughts on what I did and what the result is since I went through all
these connections and the result?

On Wed, Sep 18, 2019 at 2:54 PM William Jahn <willjahn975 at gmail.com> wrote:

> Well , tightened up all the fuel injector plugs and sprayed electronic
> cleaner . Did the same with the TPS and  trigger points and of course TS1 .
> The only change, ( it didn't pop out the exhaust letting up on the gas
> pedal or using the throttle lever.) It still had the miss and unsteady idle
> speed, goes up and down about 200 RPM just idling and bringing up the RPM
> still struggles. I'm sure the 200 RPM up down idle (since it's consistent)
> alters the vacuum signature to the MPS and timing unless the mechanical
> advance is probably not advancing at that RPM.
>  The 200 RPM up/down is not like hunting it's not aggressive. It follows
> the miss. I don't see how the trigger points would cause this doesn't do it
> with TS1 unplugged even at the same RPM and it never misses  driving it at
> any speed. When I did all the work and had the injectors out I didn't see
> any crud in the little filter screen on the inlet of any of the injectors.
>
>  I cannot find any issue with TS1 it self . As before the instant I unplug
> TS1 all the above clear instantly. I didn't try the 72 ECU didn't see the
> point.
>
>  I read on Samba all the white FI wires have numbers and they do yet the
> ones on the TPS are all legible and only #9 and #20 are correct the other
> three are 30,36 & 37 in order , I was told one could use these numbers to
> trace circuits I don't think so at least not in the Bentley.
>
>  It seems to boil down to the ECU TS1 internal circuit. I would say it's
> slightly lean because of the reaction of unplugging TS1 yet I've read it
> could be either on Samba. If it's not the ECU then it's possible the MPS is
> set to lean, yet two of them acted the same way even though one was a 0 280
> 100 101 / 311 906 051D in the car now 0 280 100 116/ 311 906 051E.  I
> replaced the plugs and all the old ones looked exactly the same. The
> insulators  were white and the ground arm was dry black sooty as were the
> ends of the threads. This could be because of short trips and a lot of stop
> and go driving.
>  I don't have much of a sense of smell I can smell gas I don't smell
> anything near the exhaust to tell.
>
>
> On Wed, Sep 18, 2019 at 10:09 AM William Jahn <willjahn975 at gmail.com>
> wrote:
>
>> I did notice that the injectors to the ECU connector when checking that
>> some read higher , if I pushed down on them and wiggled them the readings
>> would change 1 read 4 ohm moving it it dropped . I tightened then not long
>> ago yet had them off and on twice while doing the runners so I need to
>> tighten them again.
>>
>>  One other thing stood out, I used an old injector to have one injector
>> male end to test the fit of all the females and noticed while checking TS1
>> to the ECU connector I plugging it in TS1 to connect my meter and both were
>> a very loose fit. I missed this and have ben pulling the connector of TS1
>> quite a few times. I suspect if I tighten both of them this might fix the
>> TS1 acting up. My thinking is if these are not tight then TS1 readings may
>> be all over the place due to how loose they are. I kept checking the CSV
>> connector and it's tight it was not until yesterday that I actually found
>> the TS1 plug connectors were so loose.
>>
>>  I'm going to tighten the injector terminals again today and the TPS
>> since I had it unplugged several times then tighten TS1 connectors and see
>> what this does.
>>
>>  I doubt any connections that are loose are going to make it run well and
>> the overall affect of several loose connections just compounds the issue
>> making it run the way it does. A loose one here another there all adds up.
>>
>> On Tue, Sep 17, 2019 at 2:37 PM Jim Adney <jadney at vwtype3.org> wrote:
>>
>>> On 17 Sep 2019 at 10:33, William Jahn wrote:
>>>
>>> >  I do find quite a bit of varied info when reading different D-jet
>>> sites.
>>>
>>> Yes, and there's a lot of it that's misleading.
>>>
>>> > Then I need to check the wires from the ECU to each component just to
>>> > make certain TS1's 2 leads are not crossed or grounded with any one of
>>> > the other leads.
>>>
>>> There's certainly no problem with checking this, but I seriously doubt
>>> if
>>> there's short somewhere inside your harness. I've never heard of that
>>> happening, although it's possible out at the ends, where the individual
>>> wires
>>> are exposed and where then tend to get abused.
>>>
>>> > Yet since the one you have runs rich it may not have anything to do
>>> > with TS1 or TS2 internal ECU it could be any of the circuits and there
>>> > seem to be quite a few and
>>>
>>> That's exactly right. It could be any of those circuits and the temp
>>> sensor
>>> circuits could be working properly.
>>>
>>> >  I wanted to ask. I know you removed the EGR and plugged the ports,
>>> > did you remove the EGR relay? I ask because the Bosch tester does not
>>> > seem to look at that circuit.
>>>
>>> I capped the exhaust port on the heat exchanger and the intake port on
>>> the
>>> EGR valve, but I left everything else in place. My relay is still there
>>> and I can
>>> still hear the EGR valve click when I turn the key ON, but nothing is
>>> getting
>>> thru it. I did it this way because I didn't want to bother with sorting
>>> out all the
>>> wiring and worrying about what might short out to what. It's been fine
>>> this
>>> way, although it leaves the engine compartment a bit more crowded than
>>> I'd
>>> like.
>>>
>>> One of the actual reasons I did it this way was that the original EGR
>>> filter
>>> was still there when I got the car, but it was falling apart. I thought
>>> that
>>> someday I could redo the failed silver-soldered joint and reinstall it,
>>> just to
>>> see if that was feasible. I still think it would be interesting to
>>> reinstall it and
>>> see if I notice any change in performance.
>>>
>>> If you removed the relay, what did you do with the loose wires?
>>>
>>> --
>>> *******************************
>>> Jim Adney, jadney at vwtype3.org
>>> Madison, Wisconsin, USA
>>> *******************************
>>>
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>>
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