REMOVE the EGR valve, clean IT and the Plenum.
It can be "operational" and still not
be sealing. Sounds exactly like the correct symptoms.
(for some good second opinions on that)
Start a new thread in this NG with a new post.
Include in the "Header" . "Experts Needed",
and you'll see some new nics reply to your
Stay away from the intangents of the symptoms. List only the one
symptom and ALL
the remedies and repairs you've performed.
Do it in a line format, and don't add any spew
to the thread.
dies at stops after deceleration
idles fine on start up
engine runs good under cruise
etc. etc. etc......
Re: '88 Chevy 1/2 ton, 305 stalls when stopped.
Group: alt.autos.4x4.chevy-trucks Date: Wed, Oct 1, 2003, 4:06am (CDT+5)
From: firstname.lastname@example.org (Dan)
Sorry I haven't kept everyone up to date but I've been exhasted at the
end of the day.
First, thanks for the advice, but what's a lockup switch?
It sounds like a good possibility - I've been thinking this seems
Currently the truck seems to idle just fine, even when I'm stopped and
in gear, the rpms get pretty low sometimes, but it doesn't die. It now
stops almost every time I let off the gas, after accelerating from a
stop. Here's what I've done so far:
New O2 sensor
New timing chain and gears
Changed out ECM for one from the junk yard. Same for electronic spark
control, distributor and coil. New idle air controler.
New knock sensor (real tough to get the old one out!!!) New possitive
cable on battery, old one was getting corroded near starter.
Rebuilt the fuel pressure regulator.
Removed and dismantled throttle body.
Throttle position sensor tests out fine. Twice.
EGR system tests fine.
Moved the idle stop screw so that it idles a little faster. Checked
timing, but I need specs and procedure - book is weak on this because it
gives procedure but no specs. There is no info sheet on truck.
Also wish I knew how to set the idle speed correctly.
I'm thinking of replacing the fuel pump and fuel filter, but I'm really
at a loss. I've either replaced or tested everything that anyone has
suggested - except for this lockup switch. I'll try looking it up.
Any other suggestions? I've got to take this in tomorrow if not. I'm