I'm not getting a CEL light on my car, but it misfire's alot especially after I've driven it hard. I have no other way to prove its misfiring other than hearing the really light spudder from the exhaust... Does anyone else here this when their car is say in a garage, or under covered parking?? I've had it since about 5K miles... Mitsu cleaned my spark plugs and it went away for a bit.. I put racing fuel in and it doesnt sound as bad, but as soon as I put 91 octane in the car it starts doing it again... Anyone else hearing this??? Would buying an ODBII scanner and logging everything help ???

 

My car sounds the same way on 94, although I do have the CEL light. Get a pocketlogger!

Ken

 

Did it sound any better after or before the Dynoflash??? I've gotta find a website on that pocketlogger... know any? I have a Toshiba PDA with PocketPc 2K3... will that work??