Porch951
NAXJA Forum User
- Location
- Albuquerque, NM
This is a 1993 Cherokee, 4.0L AW4, 170k miles.
I've been having a lot of stumbling (almost stalling) on acceleration. I read through a lot the threads here but nothing seemed to fit just right. So here goes!
-Stumbles more when cold
-Stumbles especially under higher load (going up hill, more throttle)
-Will stumble if i punch it at any rpm/speed
-Does not seem to be any specific throttle position
-No stumble without load (revving in the driveway)
-Could not find any vacuum leaks, intake gasket is newer
-Started literally overnight
-Put in a new o2 sensor 1 week ago
-Fairly recent tune-up (<10k plugs, cap/rotor looked fine, wires have maybe 50k)
I'm going to test my TPS for dead spots this afternoon, and i'll try to test my MAP sensor too. I was leaning towards the MAP but i also considered that my cat may be plugged (i have an aftermarket 2.5" exhaust, and the gasket on the flange before the cat recently blew out, which seems to support this theory). Anything i missed?
I've been having a lot of stumbling (almost stalling) on acceleration. I read through a lot the threads here but nothing seemed to fit just right. So here goes!
-Stumbles more when cold
-Stumbles especially under higher load (going up hill, more throttle)
-Will stumble if i punch it at any rpm/speed
-Does not seem to be any specific throttle position
-No stumble without load (revving in the driveway)
-Could not find any vacuum leaks, intake gasket is newer
-Started literally overnight
-Put in a new o2 sensor 1 week ago
-Fairly recent tune-up (<10k plugs, cap/rotor looked fine, wires have maybe 50k)
I'm going to test my TPS for dead spots this afternoon, and i'll try to test my MAP sensor too. I was leaning towards the MAP but i also considered that my cat may be plugged (i have an aftermarket 2.5" exhaust, and the gasket on the flange before the cat recently blew out, which seems to support this theory). Anything i missed?