So,

I had this problem a while ago, and my mechanic (HPH) said there was too much O2 coming out, so he re-sealed the intake plenum, and it was all good for about a month.
Now its been getttin worse and worse as the weeks go on.

So....heres what happens.
Under *hard* acceleration the car begins to buck/spit/sputter at high rpm's and whenever my foot is not on the gas pedal there is backfire AKA: during shifts and under deceleration in gear. It also *someitmes* happens at a steady speed, but almost everytime under *hard* acceleration.

Thanks in advance!!!


-Peter

It's a 1975 1.8 L Jet

sounds like a classic case of a lean condition....you probably have air leaking in again somewhere. How did he reseal it?

Your plenum could be cracked