4KS Starting Problems

[Bob]

Hmmm.. I had a really tiny vacuum leak on my 4000 and it wouldnt start at all,
never mind for 30 seconds...
Bob

"S. Jaworski" wrote:

> Most likely problem is a vacuum leak. The car runs for 30 seconds or so
> cause the "choke" is on. After about 30 seconds, the "choke" gets turned
> off, and the lean mixture wont support combustion.
> On a 4 cylinder engine, the "choke" is the 5th injector located in intake
> manifold. On a 5 cylinder engine, I think the "choke" is the computer
> telling injectors to add more gas.
> At any rate, the problem on my old 85  4cyl  4k  was cracks in the boot
> which connects the fuel injection box to the intake manifold. The boot
> starts cracking from age, and/or from movement caused by engine torquing. My
> cracks were on the bottom of the boot, in-between the boot bellows.
> The temp fix was to take off the boot, clean the cracked areas, apply RTV
> sealeant, and let cure overnight. This fix lasted for couple of years.
> The permanent fix was a good looking, crackless boot from a junkyard. I got
> mine from Shokan(http://800allaudi.com/), its a mail order junkyard in NY
> state. They only deal with Audis. I think the boot cost me $35.
>
> Syl
> 85 4ks (sold to the guy that sells me audi parts)
> 88 5kq
> 90 100q
>
> > From: "b1biker" <b1biker at neb.rr.com>
> > To: <quattro at audifans.com>
> > Subject: 4KS Starting Problems
> > Date: Fri, 17 Aug 2001 00:34:27 -0500
> >
> > This is a multi-part message in MIME format.
> >
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> > developed a new problem with my 84 4KS. The car starts and runs fine for =
> > about 30 seconds and then dies. If you let it set for about 5 minutes it =
> > will repeat. Prolonged cranking will get it to sputter and try to run. =
> > Any thoughts on the cause of this problem will be appreciated.
> >
> > Gary Meier
> > 80 5KS, 83 CGT, 84 4KS, 88 5KSQ