No. Unscrew the valve and replace the o-rings. Also look for small leaks
that could cause the pressure drop.

SFC

"Keith Park" > schreef in bericht
...
> AHA! that makes sense... Ive never measured the fuel pressure. is it a
> big job changing those O rings? my fuel dist is rather rusty....
>
> THanks,
>
> keith
>
> "SFC" > wrote in message
> . ..
>>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
>>
>>
>
>