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hot or cold engine , or both?
does the cut out catch up.?
does it have full engine power up a hill wide open throttle. (key test)
on cuts, out tip-in throttle ?
dash CEL lamp off running.
scan PCM , no DTCs stored? (errors)
ever do the 60k mile tune up , (sparks and filters?)
i have 10 more quesitons, id see in 5min testing car. but .... here are some.
Had same problem with my 2002 Silverado. Took 2 month to find problem. Wires at wiring clip on valve covers that control each coil were taped to tight and the wires are so small they were braking apart.Wiggle the wires and see if the engine smooths out-runs rough-smoothes out-runs rough.Had to cut wires from connectors and wire direct. ran great for a couple of months than started again. jiggled wires and found a couple more acting up.Cut from connector and wire direct runs great again.I only have 2 wires left in original connector. The black ground wire I crimped an eyelet on both ends and grounded them to a bolt.
I had the same problem with my maxima and the alarm I replaced my starter and haven't had any problems with it yet and my alarm is back and up running as we'll so I would start with your starter.... I took mine to the auto parts store tested great because it decided not to act up at the time....but dead again all the sudden.... took starter out it was shot and put in the new one fires up everytime now alarm works great hope this helps
( I have 1997 gmc sonoma 2.2 ) i had the same problem last week.i replaced one side of my coil pack, got it from napa part store paid 40.00 dollars truck is running great! if i had the $ i would have changed both.and make sure you use the grease that comes with it.