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Originally Posted by blackhawk29
for what it matters my 08' f-450 twin turbo idles smoother than my 08 H2. Sounds like most 08's have a rough idle. at a stop light the other day, the engine idled up by itself kinda lurched forward, if i did not have the brakes firmly on it would have ended up in the back of someones car. i think gm has something messed up with the ECM fuel mapping and they need to issue a reflash update. My idle is so rough that it almost feels like its going to stall out, i can watch a bottle of water jump all over the place in my cupholder. I can also feel it through the brake pedal. I'm all for the exhaust note and hot cam, but can't we have that with a vehicle that idles properly?
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That sucks......I have to say my 04 pur's like a kitten