Help im getting a bad knock/misfire under wot in 3rd gear??
06-01-2011, 04:17 AM
#1
Thread Starter
Join Date: Jun 2011
Location: ca
Posts: 5
Help im getting a bad knock/misfire under wot in 3rd gear??
I have an O6 GT convertable. Im getting a bad knock and check engine flashes under WOT in 3rd gear. I ran a DCT scan and it gave me a P0300/ Miscellaneous misfire code. Btw I have a JLT cai along with sct program. Iv been running the program about 5 month but jus started with this issue. Also Im running the 91 program and always run 91 plus a octane booster. Wolud love any input. Thanks..
06-01-2011, 08:51 AM
#3
Thread Starter
Join Date: Jun 2011
Location: ca
Posts: 5
Srry im new at this. Thanx for ur responds but, i didnt help me much. Its not the tune iv ran it for bout 5 months. you said detonation yes but from what where, what wud cuz that? another thing u said go the stock setting and work from there???
06-01-2011, 02:10 PM
#5
4th Gear Member
Join Date: May 2010
Location: Temple, TX
Posts: 1,277
Second, have you tried loading a less aggresive tune to see if your gas is the culprit? Maybe they filled the 91 tank with 87 and now you're hearing it...
Don
06-01-2011, 02:23 PM
#6
Gentleman's Relish
Join Date: Feb 2005
Location: AZ
Posts: 13,090
I'm thinkin bad gas. Go to a different tune that requires a lower octane like BigDinTexas stated.
if the problem goes away, then you know it was bad gas. If it doesn't go away then it could be a bad plug or coil.
if the problem goes away, then you know it was bad gas. If it doesn't go away then it could be a bad plug or coil.
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