I won't be using duct tape, but I will look for leaks - thanks.
I tried re-gapping the plugs last night. Problem got worse when I opened them up to .056. Problem was less severe if I pushed the gap down to .050, but still present.
During this process I noticed that the forward bank of plugs seemed a bit fouled compared to the plugs by the fire wall. I'm gonna try an O2 sensor change - they're due anyway.
In the weeks leading up to this problem, I also noticed a little "dead zone" in the throttle. A spot that I hold the throttle at cruise. When I push the throttle through this little area, I would get just a bit of hesitation. If the O2 sensors don't work, I'll get it hooked up at the $tealer next Friday & see what they come up with.
Originally posted by Munson:
I had similar bucking problems on a previous car. Any time I lighltly tipped into the throttle with a gear engaged, the car would buck and lurch forward. Not nice unless you want coffee stains on your shirt.
The problem was a crack in an intake hose between the MAF and the throttle body. This crack let in enough unmetered air to throw off the fuel:air mixture significantly at part throttle. WOT was never a problem because the amount of unmetered air relative to metered air was very small.
Anyway, a little duct tape on the intake pipe eliminated the bucking, and verified that that was the problem.
So, for all you with bucking problems, I would look for a source of unmetered air.
