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Random misfire in closed loop
Car is the blue Z28 that was at the Oct meet this weekend.
224/228 cam and longtube headers on a 2001 camaro z28. Its running an off road y pipe with no down stream O2 sensors for after cat, seeing there are none. Newly replaced spark plug wires, spark plugs gapped to .050 and replaced fuel filter. Deleted the air injection system. Car runs fine in open loop holds idle at about 800 rpm and as soon as vehicle gets to operating temp its bucks and misfires and ses light flashes.
Code PO300 is what its reading and replaced the front 02 sensors with brand new gm corvette o2 sensors.
Car has pcm4less tune.
It bucks and misfires real bad at part throttle once this happens. I experienced it after the meet. Mainly between 1500-3000 rpm.
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1995 Z28 Convertible A4 13.78 @ 100 (CAI, high flow cat, catback, 160 thermo, hypertech, Strano springs, Koni yellows, sway bars, 3 pt. UMI SFC)
2018 Sea Doo GTX - 3 cylinders and das boooooost
Quote:
Originally Posted by BonzoHansen
Is English your 2nd language? Did you graduate high school? Your posts make my head hurt.
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 Team FARM 
Last edited by Anti_Rice_Guy; 10-17-2011 at 04:17 PM.
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