54Bajaat14
NAXJA Forum User
Alright, I've searched and looked around and tested long enough, time to make my first thread.
The jeep:
93 jeep xj 2 door, Automatic, 4.0 with 190k-ish miles
Dana 30 and 8.25 with 4.10 gears
34" tires
4 link front and rear
Gutted interior with cage
Hood louvers with a 12" fan to help engine heat escape.
A/c, all factory cooling system, clutch fan locked out permanently, rad is a 3 row alum. off amazon, factory rad cap, electric efan is a 12' on a 190* switch, all factory shrouds are intact, Separate trans cooler with 12'fan on a flip switch.
Engine components that were replaced 200 miles ago are: TPS, IAC, MAP, IAT, Spark plugs, Vacuum lines, Water pump, Thermostat and housing, Fuel pump and filter (60) miles ago, Full exhaust with cat and muffler all the way out the back.
Engine components cleaned or serviced, Oil changed 200 miles ago, Trans flushed and filter replaced, injectors cleaned, pressure regulator tested fine, air filter changed (K&N cone style), Entire throttle body disassembled and ultra sonic cleaned, intake manifold cleaned out.
I have 2 issues, the first one is, starting the jeep for the first time after sitting over night or at work, it wants to die / struggles to idle, as if it is running out of air or fuel. I can blip the throttle to bring RPM up it will stabilize for 2 seconds then start to stall out, repeat 5 - 6 more times. After about a minute of this the RPM will raise to 1900 on it's own then level out to normal and will be completely fine. I can run to the store, gas station whatever, its only when the jeep sits for 8ish hours. It has seemed to run a little weaker down the freeway, but it has also been 100-115 out here in Vegas, so being sluggish is expected, But over all runs fine after the initial stumbling.
This is a new issue that has presented itself as of a few days ago, before it was totally fine starting up any day, time or temp. Also it does this with and without the poor mans prime.
My next issue is the infamous overheating, I've spent many uncomfortable days testing different driving scenarios and factors.
Down the freeway, A/c off it runs at 205-210, Perfect. Get off the freeway, sit at a light, or drive around town and it will stay at about 225-230 and only when I accel. or am at speed will it cool down to about 215.
With A/C on it will slowly creep up on the freeway to about 230, turning A/C off allows it to cool back down to 210, once I exit the freeway or drive around town with the A/C on it jumps to 230 and would keep going if I allowed it.
When the A/C is turned on it is really noticeable with the engine performance and RPM, it seems to put a huge load on the engine, so I assume I have failing A/C components that are running hot and heating up the rad more that it should.
But the overheating around town with A/C off is concerning, especially since I have the mechanical fan locked to run at 100% all the time and the efan running all the time as well.
Also there is no water in oil or oil in water, the coolant system isn't bubbling and has never been hot enough to boil over on me. I had switched to a factory rad, since that's what most treads were saying as far as cooling and the factory system being sufficient, but it instantly over heated, multiple days in a row after multiple flushes and getting all the air out, once I went back to 3 row with stock everything else it has been the best I have gotten it in years.
All of my "tests" have been in 105-112 degree heat for about 15 miles each time (to and from work).
The weird thing with the overheating issue too is when its under 105* outside I can drive all day, any way I want with the A/C on, its only when its 105+when it overheats.
I'm sure I'm missing info, please ask if I am, I have done all the work to this jeep and know pretty much everything about it or everything that has been done to it.
Thank you in advance for the help and advise.
The jeep:
93 jeep xj 2 door, Automatic, 4.0 with 190k-ish miles
Dana 30 and 8.25 with 4.10 gears
34" tires
4 link front and rear
Gutted interior with cage
Hood louvers with a 12" fan to help engine heat escape.
A/c, all factory cooling system, clutch fan locked out permanently, rad is a 3 row alum. off amazon, factory rad cap, electric efan is a 12' on a 190* switch, all factory shrouds are intact, Separate trans cooler with 12'fan on a flip switch.
Engine components that were replaced 200 miles ago are: TPS, IAC, MAP, IAT, Spark plugs, Vacuum lines, Water pump, Thermostat and housing, Fuel pump and filter (60) miles ago, Full exhaust with cat and muffler all the way out the back.
Engine components cleaned or serviced, Oil changed 200 miles ago, Trans flushed and filter replaced, injectors cleaned, pressure regulator tested fine, air filter changed (K&N cone style), Entire throttle body disassembled and ultra sonic cleaned, intake manifold cleaned out.
I have 2 issues, the first one is, starting the jeep for the first time after sitting over night or at work, it wants to die / struggles to idle, as if it is running out of air or fuel. I can blip the throttle to bring RPM up it will stabilize for 2 seconds then start to stall out, repeat 5 - 6 more times. After about a minute of this the RPM will raise to 1900 on it's own then level out to normal and will be completely fine. I can run to the store, gas station whatever, its only when the jeep sits for 8ish hours. It has seemed to run a little weaker down the freeway, but it has also been 100-115 out here in Vegas, so being sluggish is expected, But over all runs fine after the initial stumbling.
This is a new issue that has presented itself as of a few days ago, before it was totally fine starting up any day, time or temp. Also it does this with and without the poor mans prime.
My next issue is the infamous overheating, I've spent many uncomfortable days testing different driving scenarios and factors.
Down the freeway, A/c off it runs at 205-210, Perfect. Get off the freeway, sit at a light, or drive around town and it will stay at about 225-230 and only when I accel. or am at speed will it cool down to about 215.
With A/C on it will slowly creep up on the freeway to about 230, turning A/C off allows it to cool back down to 210, once I exit the freeway or drive around town with the A/C on it jumps to 230 and would keep going if I allowed it.
When the A/C is turned on it is really noticeable with the engine performance and RPM, it seems to put a huge load on the engine, so I assume I have failing A/C components that are running hot and heating up the rad more that it should.
But the overheating around town with A/C off is concerning, especially since I have the mechanical fan locked to run at 100% all the time and the efan running all the time as well.
Also there is no water in oil or oil in water, the coolant system isn't bubbling and has never been hot enough to boil over on me. I had switched to a factory rad, since that's what most treads were saying as far as cooling and the factory system being sufficient, but it instantly over heated, multiple days in a row after multiple flushes and getting all the air out, once I went back to 3 row with stock everything else it has been the best I have gotten it in years.
All of my "tests" have been in 105-112 degree heat for about 15 miles each time (to and from work).
The weird thing with the overheating issue too is when its under 105* outside I can drive all day, any way I want with the A/C on, its only when its 105+when it overheats.
I'm sure I'm missing info, please ask if I am, I have done all the work to this jeep and know pretty much everything about it or everything that has been done to it.
Thank you in advance for the help and advise.
