Re: [86 8v, JH] engine start problems

[Benjamin Harder <vwtype53@yahoo.com>]

--- Oliver Seiler <oseiler@acm.org> wrote:
> Hi -- in tracking down my engine problems (86 8v, JH engine) I'm having
> the following behaviour.
> 
> I'll start the car cold, and my idle speed will be relatively low
> (around
> 700RPM; I don't have an idle speed boost valve) and the engine runs
> rough.
> After a short period of time (on the order of 10 seconds) the RPMs will
> go
> up to normal speed (950 RPM) and all will sound well. If instead of
> leaving it idling I rev it up to 3000 RPM a couple of times, the idle
> speed goes normal much quicker.
> 
> This doesn't happen all the time, but most of the time (I've got in the
> habit of starting it and revving it a bit right away to get the idle
> speed
> normal).
> 
> No, I haven't checked fuel pressure yet. Know where I can get a cheap
> CIS
> fuel pressure gauge? Someone mentioned getting one for $40 recently;
> where?
> 
> The fact that it goes away on it's own after cold starting makes me
> think
> it's my cold-start valve. I know the valve is working, but I haven't
> checked it's spray pattern yet; could I expect something like this if
> the
> fuel wasn't being atomized properly (like perhaps the fuel is entering
> the
> cylinders more liquid-like)?
> 
> I also have an intermittent hot-start problem where the engine will
> start
> but without a lot of effort (holding the key to start and opening the
> throttle) the engine will stall. Since my car presumably has a hot-start
> pulse relay on the cold-start valve, could this be another indication of
> a
> problem with it?
> 
> Just wondering whether my suspicions about the cold-start valve might be
> correct and if I should bother dragging a friend over to the car so that
> he can turn the key while I check the spray pattern...
> 

 Hmmm...the hot-start pulse relay could be bad.  I had to replace mine and
as soon as I did, all starting problems seemed to go away.  I would check
that relay first...just sounds similar to my problem.  HTH


=====
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Benjamin Harder
86 Scirocco 16v
81 Scirocco
http://members.xoom.com/Scirocco16v/
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