01 jimmy , rough running

ferretx9

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chuckg101 chuckg101 is offline
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I'm having problems with my 01 jimmy sls I've replaced plugs wires fuel filter cleaned maf sensor changed cam sensor and throttle position sensor. I've also cleaned the the throttle body out. It still sputters while cruising but it idles fine. Could anyone help me here? Also when I shift gears the rpms jump up 300 rpm and don't idle down for about 3 seconds. Not sure if that has anything to do with it.

Moved from a reply to new thread.
 
A few questions -

Are the plugs new ?
Air filter ?
Vacuum lines in good shape ?
Did you test the fuel pressure ?

Not saying thee above are the cure , but the answers may help someone else diagnose it .
 


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