Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello and good afternoon. I'd like you to try something. Evidently we must have a fuel distribution problem, since you are getting a lean code paired with a power loss. I'd like you to get one of the blue propane bottles. Hook a vacuum line to it and attach it to a vacuum port so you can inject it into the intake or throttlebody. I'd like you to get to the point where you don't have power, then open the valve and see if the engine spunks up and responds to the propane. Let me know how it reacts.
Your JA Expert,
Great, my friend has my bottle!!
If the propane works what would I be looking for after that?Thanks.
Hi Ivan, Just an update, I havent gotten a chance to put the truck on the bottle yet but I have been checking for vacuum leaks and still cant find any, I was driving it on sunday and the check engine light came on, I pulled the codes and now I get a 35 and 44 (iac and lean). Odd the IAC was one of the first things that I tried, ( it was OE so what the heck!!)
I drove it again tonight and still had pretty much the same hesitation, the rough idle seems a little more intermitant than before and I was down to about 1/8 tank of gas so I gased up and i'm gonna drive it to work and see if the fresh gas helps any.
Any other ideas on the new 35 code?
Kevin a vacuum leak is your most likely case. That would set both codes along with the hesitation. A lower intake manifold gasket is your most likely cause. Try checking fro the vacuum leak with carburetor cleaner around the perimeter of the intake especially on a cold start. If the idle changes at all, that will be confirmation.
Hi Ivan, thanks for the quick reply, I used about a half can of cleaner looking sunday and about a full can today and that was right after sarting it so it was cool, I sprayed it pretty good, all around the manifold and tbi, hoses, sensors, base of egr, whats so strange about it is, the problem came on so quickly, does that seem typical of an intake leak??
You know, I did notice that there was a small amount of steam (like when it's cold out) coming from the exhaust, but it seemed too warm today to have that, but it did rain heavy today about noon, but coolant passes through the intake (right?) hummmmmmm?????
What do ya think?