Acceleration Issue - NOT a Misfire

[mg614]

Was unable to find topic on search.
This morning 2000 Jeep Cherokee Limited with 145k had a funny acceleration problem. Kinda like a sputter but not a misfire. Seemed more like a bounce from the CPU. Almost like rev limiter but at low RPM.
Replaced TPS last summer.
Any ideas?

Thanks

 

[mg614]

Also - No CEL... Yet

 

[blondejoncherokee]

test TPS. CPS. all the usual suspects. How are plugs/cap/rotors? Also, how are the o2 sensors?

 

[old_man]

Have you done anything to the vehicle lately?

My concern is a clogged CAT. I would do a vacuum check.

 

[joe_peters]

Have you done anything to the vehicle lately?

My concern is a clogged CAT. I would do a vacuum check.

And a fuel pressure/volume test.

 

[old_man]

After that, pull the plugs and do a reading. While you have them out, do a compression test.

 

[mg614]

O2 sensors are new.
New muffler and cat seems fine.
I'll test TPS and CPS sensors first. Don't think it's a bad plug/wire...
Thanks for the direction guys.

Cheers

 

[MrShaft696]

yeah im kind of in your boat with a P0304 misfire code, but check the resistance on your injectors, & pull all the plugs and check the gaps.

 

[xjdavid1]

Also check fuel pressure regulator on the end of the fuel rail.

 

[joe_peters]

Also check fuel pressure regulator on the end of the fuel rail.

2000 XJ, pressure regulator is at the tank on top of the fuel pump module.

 

[2001JeepXJNS]

could be bad gasoline? Mine did the same after filling up at old 66 a few years ago. I ran some premium from my regular station and some gas additive and problem went away