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Re: sputtering at cruising speeds
Usually with a bad egr, there will be a hesitation off idle. If you are cruising at part throttle, then it could be EGR. Try plugging the vacuum line to the EGR and see if the problem goes away.
Since you have a TBI engine, it could be any of the following:
1) Worn dist staft housing
2) Pick up coil
3) TBI Gasket (spray TB cleaner around base to look for leak)
4) Leaking injector
5) Vacuum leak
//2000CAYukon
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