Engine Stumbles when accelerating

Spartacus · 05-14-2011, 03:17 AM

1986 Automatic

I'm trying to figure out what is causing my engine to stumble.

I have already replaced spark plugs, rotor, distributor cap, wires.

No codes are coming up, TPS, coil are both good. Cleaned throttle body.

I'll just describe how I have been able to recreate the problem:

I'll start the engine (hot or cold), then floor it until I get to about 30 mph (engine runs fine during this part) and then I let off accelerator. Anytime I try to accelerate after that, the engine stumbles and the idle speed is erratic, even stalls sometimes if stopped at a light.

Any help is greatly appreciated! Thank you!

05-14-2011, 03:17 AM	#1
Spartacus Stock Join Date: Apr 2011 Location: Washington D.C. Posts: 6	Engine Stumbles when accelerating 1986 Automatic I'm trying to figure out what is causing my engine to stumble. I have already replaced spark plugs, rotor, distributor cap, wires. No codes are coming up, TPS, coil are both good. Cleaned throttle body. I'll just describe how I have been able to recreate the problem: I'll start the engine (hot or cold), then floor it until I get to about 30 mph (engine runs fine during this part) and then I let off accelerator. Anytime I try to accelerate after that, the engine stumbles and the idle speed is erratic, even stalls sometimes if stopped at a light. Any help is greatly appreciated! Thank you!