90 reman'd hesitation help

[harryjohnson]

I need some help and suggestions. I have 90 cherokee with reman'd engine. The problem im having is a hesitation on acceleration from stop and at idle when revd to 2000rpm. If I step on it runs fine but as soon as revs drop to cruising speed I have bucking, step on it gone. Things already changed or checked new ICM, spark plugs and wires, distributor and rotor, MAP, IAC, TPS, mustang injectors, EGR, catalytic converter and muffler, O2 sensor, MOPAR CPS, grounds refreshed, fuel filter, fuel pressure in spec. At a loss help please.

[4.3LXJ]

TPS calibrated?

[harryjohnson]

Roger that

[4.3LXJ]

O2 sensor new?

[harryjohnson]

O2 sensor new?
Yep

[4.3LXJ]

Cracks in the exhaust manifold?

[harryjohnson]

Cracks in the exhaust manifold?
Negative

[4.3LXJ]

Unless it is injector related, then I am out of ideas

[harryjohnson]

Fixed it, hell freaking yeah, running like a dream. Read conflicting info about distributor being off a tooth. Well let me tell you, it DOES make a difference! If you find yourself in the same boat, check your darn distributor. Happy, Happy. Thanks anyways.