Silverado Sputters during acceleration
I have a 2008 model Silverado, 6 cylinder. About 6 months ago, I noticed the engine sputtering or missing when I would accelerate (going up a grade or passing a truck). If I back off the gas, it seems to recover. Out of curiosity, I gave it a lot of gas when this started happening, and the check engine light started flashing. It seems to happen right around 2,000 RPMs. I took it to a mechanic, but they couldn't find anything wrong. The truck has about 90,000 miles.
Sounds like the famous EGR, which forces the engine to smell it's own exhaust during decelleration, unfortunately decides to not co-operate, either because it was not given instructions to 'let go now' due to a leaking or removed vacuum hose so has to smell it's own exhaust causing poor performance and a bad day about it. Suspect the EGR that would only be noticed by your smog guy.
You had a light. THEY couldn't find ANYTHING wrong. me grandmama could do better. and she's been dead for five years~
In fairness to the mechanic, I hadn't gotten the light to turn on until after I took it in, but all of the other symptoms were present. Still surprised he couldn't find more...
...so you looked at the EGR, and it does not work/is buggered up. In that case, I'd recommend you mark the prior assessment "best answer" in the name of keepin it on the level~
Haven't had a chance to check EGR yet. Will let you know if that turns out to be the problem. Thanks.
You are too kind...what else can it be, after considerable thought. It is about the right age to start in-
I know this is a little late but might help someone.. If your using cheap gas that could be the issue too might want to try using an octane booster with a half a tank of gas.. You should notice a difference pretty quickly. These trucks act funny with cheapo gas.
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