Help for a bucking '93

[vee93]

Hey folks,
Need some input here.
I've had my fuel injectors checked and cleaned.
Replaced fuel filter. MAT sensor good. Ignition wires, timing and spark plugs good.
Had diagnostic done on engine and all is 1-double-A! So that rules out an intake manifold leak.
Here's my problem...
Occasionally, I'll hit the accelerator and my Vette will buck, like the gas is tainted or something.
It feels like it's back in the drivetrain-maybe in the transmission, but according to my mechanic, all is well there too.
Just had transmission fluid changed.
NO gauge lights are coming on and they all work.
Otherwise, the car drives like somthing out of a dream.
Just don't want this to become a nightmare.
Any thoughts would be GREATLY appreciated!
Thanks,
Vee

 

[cntrhub]

"......and spark plugs good." Does that mean you pulled them out and checked to see they were, "good?" Was this "bucking' going on before all this inspection and parts changing? Nix the old spark plugs. Make sure each electrode gap in within specs with the new plugs. Carefully "torque" the plugs....not hand tighten! My guess is a broken/cracked spark plug. If you reinstalled the old plugs, you may have "tinked" one going back in, (or one of the new ones?), on reinstallation. Or, you can put the engine on a scope and this will pinpoint a bad plug and/or wire.

 

[vee93]

bucking 93

Cntrhub,
I was trying not to get too wordy, but that's what I meant by "good spark plugs". The engine was scoped and no error codes showed. I was standing right there with the mechanic when the diagnostic was done.

He took the car for a test drive before the scope to get a feel of the problem for himself.

And yes, this "bucking"- medium hard hesitation on acceleration problem- has happened about 3-4 times, which is why I took the car in to be serviced.

But I'll have it done again.
Thanks.

 

[cntrhub]

Let me ask you this? This 3-4 times happeining, do you remember if you were in the same exact gears each time? Or will this do it in any gear? Anyone remove the T-V cable system to the transmission? This might need a readjustment....assuming it's an automatic? Without taking it for a ride around the block, it is just shooting in the dark I know, but hitting and missing with variables like this, will sometimes cure a symptom.