jefffoxsr

When I am accelerating normally in each gear and I just start to come back a little on the gas pedal the engine misfires. It's not a misfire on acceleration because it doesn't happen while increasing throttle or while at steady throttle during acceleration. It's not a deceleration lean backfire because the car is not decelerating and I have not completely let off the gas. It happens when first start to back off on the gas pedal after accelerating.

What do you think this is?

Thanks.

LS6BlackCTS-V

iTrader: (3)

Is it a hard misfire like a ignition problem or kind of weaker one like a fueling problem? I'm just guessing here, but maybe over fueling problem? like leaking injectors or something? Do you have a scan tool to like at data when driving?

jefffoxsr

I forgot to say that the car is bone stock except the K&N air filter. I don't have a scan tool. It is a hard misfire. In all other running conditions including full throttle this does not happpen.

LS6BlackCTS-V

iTrader: (3)

Have you tried just installing some new plugs and wires? I had a few weird misfires in the past the only missed and idle and low RPM due to carbon tracks on one or more spark plugs..

jefffoxsr

I will try that. Thanks.

nomasterase

iTrader: (4)

Get some maf cleaner and clean all the k&n oil off the mass air flow meter oh and pick up a good paper filter with the maf cleaner so you never have this problem again

jefffoxsr

I cleaned the maf and all is well. Thanks.