I know Renix stuff has been beat senseless but i'm out of ideas.
89 cherokee 4.6 stroker, aw4
Alright so after years of no issues, the other weekend she started to have delayed throttle response and if i just matted it, it would backfire out the intake.
I went through a lot of normals
Tps, cps, map, fuel pump, fuel regulator (pressure is good)
I put a new exhaust manifold on because 4 out of the 6 ports were cracked and i figured the 02 was getting crazy readings.
i refreshed all the grounds which had been done years ago but went ahead and cleaned everything anyway.
I then replaced the 02 sensor which helped greatly with the backfiring and the throttle response is definitely better but not perfect.
Now while its warming up the idle hunts a bit and idles down to the point of almost stalling and then shoots back up. when its warmed up it idles fine, if i roll into the throttle its fine, if i just mat it it hesitates for a second and then revs up as it should.
i went though and torqued the intake bolts in sequence, checked over and over for vacuum leaks. None of the vacuum lines appear to be clogged.
I dont run a cat currently due to the 4 link so thats not clogged.
I'm sorry for such a write up and to beat this subject up, i am just at my wits end and just want the snappy throttle response back.
any ideas would be awesome.
89 cherokee 4.6 stroker, aw4
Alright so after years of no issues, the other weekend she started to have delayed throttle response and if i just matted it, it would backfire out the intake.
I went through a lot of normals
Tps, cps, map, fuel pump, fuel regulator (pressure is good)
I put a new exhaust manifold on because 4 out of the 6 ports were cracked and i figured the 02 was getting crazy readings.
i refreshed all the grounds which had been done years ago but went ahead and cleaned everything anyway.
I then replaced the 02 sensor which helped greatly with the backfiring and the throttle response is definitely better but not perfect.
Now while its warming up the idle hunts a bit and idles down to the point of almost stalling and then shoots back up. when its warmed up it idles fine, if i roll into the throttle its fine, if i just mat it it hesitates for a second and then revs up as it should.
i went though and torqued the intake bolts in sequence, checked over and over for vacuum leaks. None of the vacuum lines appear to be clogged.
I dont run a cat currently due to the 4 link so thats not clogged.
I'm sorry for such a write up and to beat this subject up, i am just at my wits end and just want the snappy throttle response back.
any ideas would be awesome.