Re: Cold start issues continue (84 4000 quattro)

[Steve Buchholz]

Let's see if I can repeat my earlier suggestion without getting spanked again ...

I suspect that your residual fuel pressure is failing, either due to a leak in the pump check valve or pressure regulator near the meeting head.  The CIS system is an analog computer which uses fuel pressure as a variable, so one of the first things I always recommend is to put a fuel pressure gauge on the system & control pressures to make sure they are in the proper range.

Steven Buchholz (mobile)

----- Reply message -----
From: "Scott" <suffolkd at aol.com>
Date: Wed, Aug 11, 2010 1:41 pm
Subject: Cold start issues continue (84 4000 quattro)
To: <quattro at audifans.com>


If it doesn't start when cold what about the cold start injector?
and...........
Fuel Injector O-rings can be tested by spraying (FLAMABLE) liquid or 
either/starting fluid at them to see if his idle rises.

-Scott by BOSTON
quattro123.com

Message: 6
Date: Wed, 11 Aug 2010 11:23:44 -0600
From: "Ed Kellock" <ekellock at gmail.com>
Subject: RE: Cold start issues continue (84 4000 quattro)
To: "'Johnny B'" <pre95 at live.com>,  <quattro at audifans.com>
Message-ID: <785B0F29D9C045E2BCD7BBC8DB79C08D at Boonieslap>
Content-Type: text/plain;   charset="us-ascii"

Have you checked the injector seals?

Touching the gas and having the engine die sounds exactly like a too 
lean
situation.  On my 85 urq I went around and around and found that all my
injector seals were loose.  We removed each injector and just tightened 
each
seal and cured what amounted to a serious vacuum leak.  They're not all 
in
hoses.


Ed



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