> Subject: [gti-vr6] Hot Starting
> From: "The Korczaks" <korczaks@ptdprolog<img src=/i/dn.gif border=0 width=35 height=15>>
> Date: Sat, 15 Aug 1998 12:15:42 -0400
> My first question for the group. My '95 has had a hot starting problem
> almost since new. The inept dealer "could not duplicate" the problem. It
> seems like old fashioned vapor lock. The problem is worse when its hot
> outside. It usually starts fine within 5 minutes of shutting off.
> However, if you let it "soak" for 10 to 20 minutes, you have to crank it
> for 5 -10 seconds to get it to start. Any suggestions? Fixes? The car is
> stock except for airbox mods w/K&N.
The first thing you do with a hot start problem is a fuel pressure
leak-down test. Hook a fuel pressure gauge to the fuel rail, start the
car, shut it down and see how much fuel pressure you have remaining
after some period of time. There's a spec for this, and if you want,
I'll look it up. If the pressure bleeds off too fast, you get vapor
lock and hot-start problems. Any decent dealer or VW mechanic
would/should do that test given a hot-start complaint even if they
couldn't duplicate the problem. Anyway, your 10-20 minute time-frame
sounds totally classic. Once you verify that the pressure is leaking
away too fast, the trick is finding the source of the leak...(It's not
usually an external leak, but fuel finding it's way back to the tank
through the return lines when it shouldn't).
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