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Running odd when cold, sometimes when warm
Over the summer my 96 trans got flooded out, but there was no engine damage. The opti, cables, plugs and fluids where all changed (along with the brakes), the top end was a total rebuild with le2 heads cam etc etc etc. There was no problem when i first got the car back, but as it got colder out every once in awhile the car would stutter. No other way to describe it... id be cruisin along at 70mph then all of the sudden for a half second the rpm needle would "drop and pop" very quickly down then up say about 1-1.5krpm like it was going to stall, then resume like nothing happened.
It feels like i smacked into a group of potholes or like when traction control comes on but much more fiercely and in a rapid on and off manner. It might do this once in a hour long drive, or for a period of a few minutes ever few seconds then go away. Now that its cold all the time, every morning for less then a 100 yards distance the car stutters like mad then it goes away like nothing happened... and resumes its once out of the blue occurance, maybe 1ce a week... it kinda happens most at steady low rpm but sometimes it will still occur if im flooring it but it seems to have enough umph to get through it sorta speak. back to the morning... when i first start it up, you can hear the car sounds choppy toned, louder, deaper and almsot poppy but no backfire or anything... but def not the normal tone. driving off down the road it feels like only every other cyclinder fires (i dont know if its true just what it feels like is happening) like theres rapidly changing amounts of available power like driving over railroad tracks. then before you know it its gone by the time i get aroudn the block.
the colder out it is, the worse the symtoms in severity. on warm days i can barely feel it but its still there to some degree. theres almost a tapping noise from the engine bay (from where i can tell while sitting in the drivers seat) if you apply alot of throttle as the engine speeds up, but doesnt sound like pinging or knocking, almost like metal tapping at 3x per second roughly.
any ideas? i recorded it in obd2 software but i dont always know what im looking at. theres no knock retard or misfire recorded over all, and the live data sensors dont show anything, but then again it happens so quick it might not even be refreshing fast enough to record the right sensor when its happening. i can post it if anyone wants to take a look... i get no trouble codes, past or present or engine light.
ps only 67k miles on my 96, less then 1k on all the new parts, even less on the opti/plugs
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Current:
2002 Silver Metallic Kawasaki ZZR1200C1
Old:
2003 White Crown Vic P71 *sold*
1996 Burnt Red Metallic Trans Am M6 Ram/LE2/4.11 *sold*
2000 Silver Cougar V6 M5 *totalled haha*
1986 Black Cutlass Calais Coupe M5 *sold*
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