A typical case of vapour lock. The fuel pressure drops to quickly. It should
be at least above 1bar/14psi for about 20min after shut down. I changed all
the o-rings of the pressure regulating valve in the fuel distr. and it fixed
the problem.

SFC

> schreef in bericht
...
> "Keith Park" > wrote:
>
>>87 Golf, CIS (No E)
>>
>>Whenever I start it hot or warm it starts right up but runs poorly and
>>hesitates for the first 20 or 30 seconds or so. Is this NORMAL with
>>todays
>>Crappy Gas vaporizing in the fuel lines?
>>
>>Does anybodys 85-87 Golf have a nice pleasant hot start idle right off the
>>bat?
>
> My '87 Golf with CIS has been doing basically the same thing
> for 6 or 7 years. My car has 553K on it now, this started back when
> the mileage was back in the 200K range.
> It starts and idles fine when cold. Once warm it will start
> and idle OK only if it has been sitting for less than 5 minutes or so.
> If it sits longer than 5 mins it starts fine but runs really crappy
> due to a rich mixture (a very rich mixture gives the exhaust a
> distinctive smell). It will idle fine if I either let it fast idle
> (foot on the pedal) for a minutes or so or start driving it for a few
> seconds.
> It has done this despite a new fuel pump, new fuel pump check
> valve, new injectors as well as a different (used) warmup regulator,
> frequency valve and ECU. I've come to the conclusion that the fuel
> distributor is a fault, mainly due the fact that it is the only fuel
> injection component not yet replaced. I have a rebuilt one ready to
> install, just haven't got around to doing it yet.
>
>
> Todd
> Seattle,WA
> '86 GTI, Red of course. (exciting racey car) 261,000 miles
> '87 Golf, Polar Silver. (boring work car) 553,000 miles <- Yeah, baby!
> http://www.pureluckdesign.com <-Ferrari & VW stuff