'93 S-10 Blazer stalling:Need Help

[rharmon]

I have had a stalling/Idling problem for about 2 weeks now. It's got the 4.3 Vortec engine "W" code. It will run fine for hours sometimes, but a majority of the time the engine starts to die out and shakes before it dies. When I turn it over the engine starts right back up. Give it 30 seconds and the engine will shake and die again. It's sounds like it's trying to stay running but eventually will just quit.


Within the last 30 days I've had the fuel pump, fuel filter, fuel injector assembly, fuel lines, upper intake gasket and PCV valve all replaced which cost me well over $1000. I've cleaned all the rotors in the distributor cap and air dried it. Made sure all the spark plug wires were correct. This dying out problem started happening the day I got the oil changed and also cleaned off the eninge with a product called "Gunk" and then rinsed it off with a light stream of water. I figured if it was a problem with getting something wet 2 weeks should be enough time for it to dry. I also traced all the vaccum lines to make sure they were tight. The "check engine light doesn't ever come on either. Every once in a while when it's not running good there will be an excess amount of light colored smoke that comes puffing out of the tailpipe.


I have exhausted all resources I know. Could it possibly be a clogged hose somewhere? Or possibly a carbon-clogged EGR valve? I took it to the local GM dealership and they didn't get any codes from their scanner so I figured if it was an EGR valve problem it would've told them. Any advice would be appreciated. HELP!!!

[aleekat]

First all the symptoms point to a fuel related problem.
Electrical, normally will die without sputtering.
Vacuum, will occur at all times.
Wet, should be dry by now.

[Rowlin]

it is a fuel pron but it the egr chocking it out it the question
try unplugging it when the truck runs good it will set a code and its the egr code. try driving for a bit and if it doen't happen again its the EGR

my 94 did the same thing so i unplugged it and it ran great
another thing u can do is when it runs rough tap the egr if it correct itself there is the prob

[camzaro28]

that is similarto the problem i have been having recently then this mornin it got real bad so i took it to mech and he said the alternator was about ot go,, there would be slight clanking noise then engine would sputter and and almost shut completly down
first i called around and just bou teveryone told me it was probably fuelpump related.
well i doubt this is ur problem but u could look into it atleast.. aight man later

[rlith]

Sounds like your ignition module (in the dist cap) Replace that and use dialectirc grease on the back side.. Once water gets under your cap, that is what goes..