Had a problem with my Kick today.
When it was cold eveything was OK ( I suspect the higher idle helped )
When the motor got to operating temperature it started running real bad down low. Idle was rough and when you accelerated off the lights there was a hesitation that was real annoying

. Highway driving was fine and fuel economy seemed normal.
Any way as it turned out I went down to my local Zuk dealer and a very helpfull mechanic sugested I isolate the EGR valve.He showed me how to this. Basically you disconnect the small hose between the EGR valve ( located at the back left of the block - viewed when looking from the front bumper back into the engine bay ) and the valve you see at the top left of your motor ( just behind the rocker cover ). Then stick a screw in it to block the hose pipe ( actually a vacuum hose ). Once this was done it ran perfectly

He stated that this was a very common problem and this is how they fixed it. He said they also put a blanking plate on the block after removing the valve permanently

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Well I hope this helps someone else out there if this problem should arise

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Zeus