September 10, 2009hi, i picked up a good 1994 silverado a few months ago for $1000. The truck ran good when i bought it but slowly started running like crap. It would run good at idle but when you would ease on the gas it would not fire a few cylinders. I put headers on the truck and have yet to hook up an exhaust to it. I had a feeling that the egr wasnt getting enough backpressure and/or the spring is worn out on the egr. I read somewhere that a guy unplugged the plug for the egr solenoid and it cured a problem identical to mine. I tried it out and sure enough, my truck runs great now with the unhooked egr solenoid. It hasnt thrown any codes yet surprisingly. I was wondering, is it bad for my truck to run it this way? and why is my truck running this way? needs a new egr? egr solenoid? exhaust? any help would be appreciated. thanks
Forums : Silverado (c/k) (1988 - 1998) : Egr problems, need help (1084 Views)
Subscribers : Cubfan74
September 11, 2009If you're riding around with open headers then your O2 sensor isn't reading any exhaust. That could be your problem or part of it. Also try a new solenoid.
September 11, 2009well right now i have the stock ypipe hooked up pretty ghetto but it has a brand new o2 sensor on it. Their is still minimal backpressure though. Could it also be the egr valve or would it be just the solenoid. Is it bad to run my truck with the solenoid not plugged in?
September 12, 2009unpluging the EGR is what you do to set timimg then plug it back up
on a 94 the EGR has most likely gone bad
September 12, 2009Your egr is bad. When you buy a new one make sure you get the right one. There a few different one for your truck and they all look the same. You'll need to get the part number off of yours before you get the new one.
September 18, 2009I have had a similar problem with my EGR valve becoming gummed up with carbon, what I had done, was take the EGR valve off take canned air, blow it out(all it takes is a tiny particle of carbon to give you problems) put it back on. There are some auto repair places (local Chevy dealerships) that have an Atomizer type of spray that will clean out the entire intake manifold and EGR valve of all carbon, cost a few bucks, but its worth it. Cheap gas is the real problem along with the age of your truck. Thank goodness its a chevy