Toyota: 1990 Toyota Celica GT, Bucking at low speed, wire hose clamps, mass air flow sensor

Question
Follow up Question,Ted Ritter is unavailable - Maxed out.
Original Q: I have a 1990 Toyota celica GT.,2.2, 5SFE Cal. Eng.  About two weeks ago the car began to have just noticeable pulsations when decelerating at no throttle or in a minimum acceleration. The Problem is it periodically goes into a self energizing severe bucking that continues to increase even with no throttle. Once it begins to buck it will continue to cycleicly increase in severity until I disengage the the clutch at no throttle. I changed: Plugs, plug wires, cap, rotor, air & fuel filters. The car runs much better now but still has the unchanged problem.

Ted Ritter's Answer: Check the Large air intake hoses from the air filter over to the throttle body for any cracks and make sure the clamps are all tight.

My Follow-up Question: From Ted's recommendations; I replaced the cracked air cleaner hose, upgraded the wire hose clamps to strap clamps, checked the filter box for cracks, and gently snugged up the filter box mounts/seals.

I got a partial success! 50% of the bucking problem is gone. Now, the bucking is much less severe and will dissipate at no throttle but, the car still consistently self initiates a bucking sequence when at low throttle and load - as when in a line at a crowded freeway on ramp.

P.S. I had new engine mounts installed about 6 mo. ago.

What next?

Answer
Hello!

did you check che MAFS? (mass air flow sensor, placed on the intake hose after the air filter)
It's an air flow sensor, very easy to damage, and if it's damaged, it sends wrong values about air flow to the ECU, resulting in bad air/fuel ratio.

Let me know!
Regards,
Jack