[T3] On and off hard start FI 73 type 3 ?

[Jaime]

Selling my two type three?  Who can I contact?

Sent from my iPhone

> On Jun 24, 2022, at 7:47 PM, Keith Park <topnotch at nycap.rr.com> wrote:
> 
> Ya know, and this has been dinner discussions at the invasions, but I never
> have ANY problems starting on the first stroke or 2 cold or hot, EXCEPT when
> 2 things happen,
> When the regulator lets the pressure go too high then it floods, and this
> was a discussion a month or so ago when Jim figured it out to be the threads
> getting corroded and not letting air in the regulator, and the second being
> when the backflow valve on the pump leaks down.  When Jim rebuilt my pump
> the new bulletproof nylon valve did leak down, at least initially and I
> solved the problem with a separate back flow valve, inline with the hose,
> that he gave me.  Now, pressure remains up for quite a while and comes up
> instantly when  I turn the key on... no problems starting.
> 
> Keith
> 
> 
> Topnotch Restorations
> topnotch at nycap.rr.com
> http://www.topnotchresto.com
> 71 Squareback  "Hothe"
> 65 Notchback  "El Baja Rojo"
> 93 RX7  "Redstur"
> 13 Subaru Outback "Blendin"
> 
> -----Original Message-----
> From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> On
> Behalf Of Jim Adney
> Sent: Friday, June 24, 2022 10:25 AM
> To: type3 at vwtype3.org
> Subject: Re: [T3] On and off hard start FI 73 type 3 ?
> 
> The question you never asked was, "Why does this happen now when it never
> happened when our cars were new." The short answer is, "I don't know, but I
> can guess."
> 
> For what it's worth, my startup experience is EXACTLY the same as yours.
> 
> When our cars were new, there was grey vinyl sleeving over all the FI hoses
> in the engine compartment. My GUESS is that this sleeving served as a bit of
> a heat shield, keeping those lines just a bit cooler in the heat soak after
> shutdown. When those hoses were replaced over time, the vinyl sleeves were
> thrown away, because the new hose was a bit too big to fit inside the
> sleeves and the vinyl may have shrunk a bit, too. It's also worth
> remembering that even when my '68 was new, I'd sometimes turn the key ON and
> OFF a few times to make starting easier. Later FI engines tended to run
> richer and cooler, but they had the same thermostat, so I'd expect the heat
> soak to be the same.
> 
> Back in the day, I bought a roll of the sleeving from VW, but it came in
> black rather than grey. I figured that black would not be as good a heat
> shield as grey, and the hose I had at the time was still too large to fit
> inside it, so I never tried it. I have smaller hose now, so I might try it
> next time I replumb an engine, but the primer switches work great, so
> there's little incentive to look for a solution that still needs some use of
> the primer switch.
> 
> Jim
> 
>> On 23 Jun 2022 at 15:31, William Jahn wrote:
>> 
>> I have a prime switch and use it until I hear no more air then cycle 
>> the key once pump the pedal once and most of the time it starts fine. 
>> Sometimes it will start then quit yet I try the key again and it starts
> right up.
>> Once it starts I can drive it and shut down and it always starts right up.
>> 
>> I drove it yesterday and it started fine , today it quit once then 
>> started.
>> 
>> I  replaced the fuel pressure regulator back in the mid 90's yet even 
>> the original worked fine , never had any issues starting or air in the 
>> fuel lines where I needed a primer switch  I just turned the key and 
>> it fired right up.
>> 
>> I have checked everything and have power to the ECU from the power 
>> relay and the pump relay always times out every time. The connector 
>> that feeds the ECU from the power relay is clean and tight.  I 
>> replaced the fuel pump with a 2 port type and it's been fine. I also 
>> replaced the fuel filter and don't have many miles since both were 
>> done. Not long ago I took apart the power relay and cleaned the 
>> contacts and replaced the ground wire since half of the  1/4 " female
> crimp was missing.
>> 
>> All I can think of is that the fuel pressure regulator is bleeding 
>> down overnight. The fact that once it's started then runs and starts 
>> right up every time after tells me it's not a wiring issue.
>> 
>> The odd part is usually if it starts and tries to die if I feather 
>> the throttle it will keep running. It's when it starts and runs for a 
>> minute or so then just quits that has me baffled. This has only happened a
> few times.
>> 
>> William
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> 
> 
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
> 
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