misses when accelerating - datamaster help
Thread Starter
Racer
Joined: Sep 2004
Posts: 258
Likes: 0
From: Coram NY
misses when accelerating - datamaster help
I have a miss when accellerating, sometimes pretty severe. I recorded about 15 minutes of driving using Datamaster. Can anyone tell me what relationships I should be paying attention to when trying to decifer this information?
Thanks,
Tom
Thanks,
Tom
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Thread Starter
Racer
Joined: Sep 2004
Posts: 258
Likes: 0
From: Coram NY
its an 86 manual, and i was determined to find out something, so i went out with my drop light and a can of throttle body cleaner. I recently upgraded with (FIC) Bosch II injectors, new fuel filter. I had this miss before I changed the injectors. So it really comes down to basics, if it sounds & acts like a vacuum leak them most likely its a vacuum leak. I started it up and sprayed the cleaner around the plenum, as I sprayed around the throttle body the RPM's increased.
I pulled off the throttle body and cleaned the mating surfaces I even replaced the gasket. Put it back together, started up, sprayed around the throttle body, only on the drivers side, rpms increased, I found a crack in the vacuum hose ( part of the crankcase ventilation) new hose
all good seems to have cured the miss on accelleration!
-Tom
I pulled off the throttle body and cleaned the mating surfaces I even replaced the gasket. Put it back together, started up, sprayed around the throttle body, only on the drivers side, rpms increased, I found a crack in the vacuum hose ( part of the crankcase ventilation) new hose
all good seems to have cured the miss on accelleration!
-Tom
Race Director
Joined: Sep 2003
Posts: 16,837
Likes: 338
From: Database Error Indiana
