4x4JeePmaNthINg
NAXJA Forum User
- Location
- Colorado
So I've recently been on some long journeys to southern CO mountains. I've done this trip many times in my 99 auto.
Two different motors. Currently low end power is usual and everything is normal until climbing highway passes and it bogs to 40mph and doesn't want to hit overdrive/ passing gear, whatever it is, until it drops below 40mph. Once and a while it'll give it up and scream the RPMs up to fight up the hills, like it should.
I've done this trip on 33s 4.56s lots of times so I'm trying to learn what I'm looking at for this power change in my trips.
New motor is 95/92 vs the old 99 and its pretty similar power, but the older had a little more scoot before they tightened emmissions based changes. The TPS is new Mopar and I've been messing with the throttle cable adjustment lots to compensate/ try for different throttle responses. Today i maxed out the cable by placing the plate at W.O.T. by hand, rather than the pedal. It shifts smooth and seems to access O.D. a little easier, but the old engine would constantly be trying to shift down for passing power on these roads, it fought to Scoot up these passes. Something isn't giving the sane fight response for the jeep taking on mountain passes.
Flat ground ground I can rap out to high mph easy. I know jeeps struggle in CO, but with 226000 ish on the rig, what would I look to for a difference?
I'm not really sure where to aim with this rigs age.
Injectors, trans, cat?....
Injectors-bwd 4 hole
Cat- stock
Exhaust manifold- banks, straight pipe other than cat.
99 all other parts bolted to motor
Aw4-stock
Up stream 02- ngk,
Downstream bosch
aw4 fluid level good and color good.
P1391 code still, even with new harness. No change or hiccups, the only thing is cel stays on other wise you'd never know it's there.
What do you all think?
Two different motors. Currently low end power is usual and everything is normal until climbing highway passes and it bogs to 40mph and doesn't want to hit overdrive/ passing gear, whatever it is, until it drops below 40mph. Once and a while it'll give it up and scream the RPMs up to fight up the hills, like it should.
I've done this trip on 33s 4.56s lots of times so I'm trying to learn what I'm looking at for this power change in my trips.
New motor is 95/92 vs the old 99 and its pretty similar power, but the older had a little more scoot before they tightened emmissions based changes. The TPS is new Mopar and I've been messing with the throttle cable adjustment lots to compensate/ try for different throttle responses. Today i maxed out the cable by placing the plate at W.O.T. by hand, rather than the pedal. It shifts smooth and seems to access O.D. a little easier, but the old engine would constantly be trying to shift down for passing power on these roads, it fought to Scoot up these passes. Something isn't giving the sane fight response for the jeep taking on mountain passes.
Flat ground ground I can rap out to high mph easy. I know jeeps struggle in CO, but with 226000 ish on the rig, what would I look to for a difference?
I'm not really sure where to aim with this rigs age.
Injectors, trans, cat?....
Injectors-bwd 4 hole
Cat- stock
Exhaust manifold- banks, straight pipe other than cat.
99 all other parts bolted to motor
Aw4-stock
Up stream 02- ngk,
Downstream bosch
aw4 fluid level good and color good.
P1391 code still, even with new harness. No change or hiccups, the only thing is cel stays on other wise you'd never know it's there.
What do you all think?