mikerhyne
NAXJA Member # 1375
- Location
- Aurora, CO
Rig: 98XJ, AW4, 177k, 5" lift, 4.56s and 33s, stock under the hood.
So the other day I took the jeep for a longer drive on a hot day since I suspected my radiator was not cooling great to test it and something else weird happened. Once I got it running good and hot 216-220 range without AC at highway speeds all of a sudden it lost most of it's power to the point where I could not accelerate on anything other than flat under about 40MPH. It didn't sound like it was missing, no backfires, it did sound like it had a cold air intake on it when it bogged down as it was louder and it sounded like it was a louder intake noise. I pulled over thinking something was loose and could not find anything and limped home. Anytime it was over about 2100 RPMs if lost most power and I had to nurse it along below those RPMs.
Yesterday I tried to reproduce it and I couldn't but I didn't get it as hot or drive it as long. I did not find any intake leaks either.
It is not throwing any codes.
Recent changes
-Reman alternator - the factory one was having low voltage output
-Coolant temp sensor from Autozone - gauge was not working at all before
-Map sensor from Autozone - was having the occasional hesitation and this solved that
Clearly it is running hotter than desirable so I will go get a factory radiator for it this week and put on a trans cooler too. I may grab a factory coolant sensor too.
What else should I check to avoid repeating the power loss and getting stranded somewhere? I have some ideas but figured I'd ask for you help to help me decide what to check or replace first.
Thanks!!
So the other day I took the jeep for a longer drive on a hot day since I suspected my radiator was not cooling great to test it and something else weird happened. Once I got it running good and hot 216-220 range without AC at highway speeds all of a sudden it lost most of it's power to the point where I could not accelerate on anything other than flat under about 40MPH. It didn't sound like it was missing, no backfires, it did sound like it had a cold air intake on it when it bogged down as it was louder and it sounded like it was a louder intake noise. I pulled over thinking something was loose and could not find anything and limped home. Anytime it was over about 2100 RPMs if lost most power and I had to nurse it along below those RPMs.
Yesterday I tried to reproduce it and I couldn't but I didn't get it as hot or drive it as long. I did not find any intake leaks either.
It is not throwing any codes.
Recent changes
-Reman alternator - the factory one was having low voltage output
-Coolant temp sensor from Autozone - gauge was not working at all before
-Map sensor from Autozone - was having the occasional hesitation and this solved that
Clearly it is running hotter than desirable so I will go get a factory radiator for it this week and put on a trans cooler too. I may grab a factory coolant sensor too.
What else should I check to avoid repeating the power loss and getting stranded somewhere? I have some ideas but figured I'd ask for you help to help me decide what to check or replace first.
Thanks!!