Anyone ever seen an engine do this?

[zjorvis97]

I have the live data scan as well. I got a new cam sensor. We will see what happens today.

[zjorvis97]

So new crank sensor, cam sensor, cap, rotor, wires, check timing and it was fine. TPS sensor and MAF sensors read correct numbers on the live scan tool. Anyone have any ideas. I am doing a compression test tomorrow. 

[WillC]

Partially plugged catalytic converter.

[zjorvis97]

there is no cat on my jeep, just muffler

[BlacXJeep]

ECU?

[zjorvis97]

if it was a bad ECU, I would think the engine wouldn't run at all. I am going to try and replace the distributor.

[rocket]

if it was a bad ECU, I would think the engine wouldn't run at all. I am going to try and replace the distributor.

Not True, My camero had a bad ECU, and it still ran.  Just the speedometer, AC, and fuel control (would step on gas, but no more fuel added till throttle was wide open, made for some interesting driving) were affected.  Was very confusing till I had a shop check it out (was a 91, so no OBD II)