As stated above i have a problem when i hit 5800rpm when vtec hits with or without vtec the car still misfire at 5800rpm+......what could be the problem....boost fine until 5800 comes alon g and misfires... too rich ? too lean?? or can it be something with the spark plugs and wires???
Setup: stock jdm h22a, turbonetics t3t4, tial bov and w/g, drag fmic & downpipe, rev hard turbo manifold, 450cc, walbro 255 fuel pump, p28 neptune, ngk spark plugs vpower and wires gaped at .30.......boost fine until i hit 5800 and it does the same thing w/o vtec
Last edited by 93BoostedH22A; 04-29-2006 at 04:58 PM.
how many lbs of boost? what spark plugs ngk8's? try gapping them at more at .25 or .22 it could be blowing the spark out, or running to rich, thats my guess.
Can you post dyno and a/f graphs? If not, what a/f values were you seeing when he tuned it? Again, you can NOT ask us if it's too rich or too lean, there's no way we can know.
You've asked for help and given us nothing to go on.
If Tony is tuning your car then he is probalby tuning it conservativly so your a/f will be good. Are you running stock distributor and coil? Did you put a new cap and rotor in? you should be running ngk 8's and try gapping them to .20-.25
hmm i wonder if this is what my problem was? I last had my car tuned before i stored it last year. I had a misfire around 6500 and then again around 7300. My Dynos here http://preludeonline.com/showthread.php?t=191802 The misfire was consistant on mine as well. Ill have to start her up soon once im done with school for the semester to see if its still there.
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