Re:Subject: Cold Start Question?

[Leah Mueller <muellerl@cadvision.com>]

Russ, have you checked for vacuum leaks and or sticky ISV?

David

>Date: Tue, 15 Dec 1998 14:54:50 -0700
>From: Russ Southerlin <russell.s.southerlin@lmco.com>
>Subject: Cold Start Question?
>
>Have had some difficult cold starting problems lately and thought I
>would see if anyone has any suggestions. Here are the symptoms.
>Subject: 87 5KTQIt fires on the second crank but stumbles and idles at a
real low rpm and will die. After another 2 to 5 tries it will eventually
fire up and idle perfectly. It only does this on cold start.  The colder it
is the BETTER it starts.  If it is say 30-40 degF it will stumble but the
other day it was 12 DegF and started up much better. I think cold start
valve is O.K although it has been a few months since I have chacked it. Hot
starts are good no matter how long it hot soaks. I had a old used (but
good) warm up reg. and replaced it and did not notice any change.I have
checked all fuel pressures and they are O.K. I have pulled fault codes and
found nothing. Although I was getting a rpm sensor fault a couple months
ago. I think if there is no rpm signa you would not get it to start at all.
>
>Any Ideas?
>Russ
>87 5KTQ
>Littleton, CO
>