Ok, I have a ’93 pickup 22re w56. It has 250k miles about 60k on a new motor. It has an intermittent problem, where it lacks power. It only dose this once warm, if I start it cold it will run fine through all the temp ranges. If I restart it after it is hot, most of the time it will have a hesitation between 2k and 3500 rpms, then seems to run better. If I shift and the rpms drop back into that range it will bog down again. It will continue to do this until it is plenty hot again. Granted the temp gauge never gets above half, and it doesn’t move much if any from hesitation to working fine.
I have changed the ecu temp sensor, the tps and cleaned the maf. None of it has made a difference. It doesn’t throw any trouble codes. But if I unplug the tps it doesn’t have any problems? It will throw a code then. Thanks Neil

 

Have you made sure your tps is adjusted correctly? If you replaced it it needs to be realigned with a feeler gauge and ohm meter. Search tps adjustment and you should be able to find a walk through

 

Mine had this issue I tried everything and it turned out to be the o2 sensor

 

o2 kicks in at temp. Was running fine cold, at temp was gutless

 

Thanks for the help. The tps is in speck, as is the temp sensor and maf. I have a good sense on how to change and adjust them. Done it a few times. I will check the O2 sensor but i am doubtful that it is the culprit. should throw a code, and the truck only hesitates between not hot and hot once i restart. it will run fine once it gets to temp also. it's also unlikely the O2, as it is running good with the tps unplugged, but i feel the fuel mileage is down. The truck has been finicky about ecu temp sensors before and wondering if the new one isn't also causing an issue. Thanks Neil