Bryan 02TA

Ok, i posted my problem on here a while back about the car running horrible and missing all the time. Turned out to be a broken porcelain on a spark plug. Changed all the spark plugs and the car still has a high rpm miss. It starts breaking up bad around 5000 rpm. I thought for sure the autotap reading would give a clear cut answer to my problem. It didn't report any miss in any cylinder at any time.

I have no idea how to get an excel document on here, so all i can do is email it to you guys i guess. Unless you have any ideas? I just need to fix this problem b/c i'm trying to sell this thing. Please help!

Bryan

Bryan 02TA

c'mon guys, somebody has to know something about this problem. I need help bad!

Bryan 02TA

ok maybe i'll try ls1.com

Bryan 02TA

i've got a link to the autotap log.

www.slowls1.net/brian.xls

Bryan 02TA

would it help if i said the car backfires sometimes and i'm getting horrible gas mileage???

2xLS1

iTrader: (25)

You can see 1/2 way through your 100% throttle run the MAF rate and timing take a big dump. That's probably when the car is backfiring. I can't see anything in that log that says what is causing the backfires. You might try logging a WOT run monitoring cyls 1-8 misfires and see if you can narrow it down to a specific cylinder. It would also help to know more about the car and all it's mods and when this problem started.

Bryan 02TA

i think he did monitor the cylinders, it's just not on the file. It didn't pick up any missfires in any cylinder, doesn't make any sense. The car is bone stock with just a dynomouth catback and cutout.