CF Veteran
Replaced the temperature sending unit with the correct one from autozone and it still reads low. I may pull the thermostat housing and put in a 195 just in case it's stuck open or something. Not sure why all the temp sensors would be wrong.
Moderator of Jeeps
Didn't you say the IR gun showed the correct temp at the thermostat housing? If so, your thermostat is working
CF Veteran
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It did most of the time I was checking it again yesterday and it was around 180 so I could've pointed it slightly differently or something but it's still up there a bit. I drove the Comanche an hour today and it didn't even hit the first lineOriginally Posted by NewKindOfClown
Didn't you say the IR gun showed the correct temp at the thermostat housing? If so, your thermostat is working
Moderator of Jeeps
Sounds like you have air trapped in the system. A bubble at the thermostat housing would explain the different IR temps, and one at the back of the head is common to cause low temp readings
Seasoned Member
I have a 97 xj 4.0L sport
Is the windshield washer fluid tank inside the driver side fender?
Reason I'm asking is because I'm thinking about buying a snorkel and if it's on the driver side, wouldn't the washer fluid tank get in the way?
Is the windshield washer fluid tank inside the driver side fender?
Reason I'm asking is because I'm thinking about buying a snorkel and if it's on the driver side, wouldn't the washer fluid tank get in the way?
Senior Member
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Is the windshield washer fluid tank inside the driver side fender?
Reason I'm asking is because I'm thinking about buying a snorkel and if it's on the driver side, wouldn't the washer fluid tank get in the way?
#1 yesOriginally Posted by mannydantyla
I have a 97 xj 4.0L sportIs the windshield washer fluid tank inside the driver side fender?
Reason I'm asking is because I'm thinking about buying a snorkel and if it's on the driver side, wouldn't the washer fluid tank get in the way?
#2 yes
#3 you do a lot of water crossings? Snorkels look cool but there are a lot of drawbacks.
CF Veteran
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Any tips to get air out? I've never had issues with it beforeOriginally Posted by NewKindOfClown
Sounds like you have air trapped in the system. A bubble at the thermostat housing would explain the different IR temps, and one at the back of the head is common to cause low temp readings
Moderator of Jeeps
Officially, the air is supposed to work its way out on its own. In reality, that doesn't always happen.
The cleanest way is get the Jeep up to temp and aggressively massage the coolant hoses, squeezing then firmly in different places on each hose. The pressure fluctuations can push out trapped air.
The method I normally use is to raise the rear end of the vehicle so the temperature sending unit at the back of the head is the highest point in the system. I remove the sending unit while the coolant is cold, run it until no more air is coming out of that port, and then I reinstall the sending unit. During that process, I still kneed the coolant hoses.
It may or may not fix your problem, but it's free and doesn't take long to try it
The cleanest way is get the Jeep up to temp and aggressively massage the coolant hoses, squeezing then firmly in different places on each hose. The pressure fluctuations can push out trapped air.
The method I normally use is to raise the rear end of the vehicle so the temperature sending unit at the back of the head is the highest point in the system. I remove the sending unit while the coolant is cold, run it until no more air is coming out of that port, and then I reinstall the sending unit. During that process, I still kneed the coolant hoses.
It may or may not fix your problem, but it's free and doesn't take long to try it
CF Veteran
Quote:
The cleanest way is get the Jeep up to temp and aggressively massage the coolant hoses, squeezing then firmly in different places on each hose. The pressure fluctuations can push out trapped air.
The method I normally use is to raise the rear end of the vehicle so the temperature sending unit at the back of the head is the highest point in the system. I remove the sending unit while the coolant is cold, run it until no more air is coming out of that port, and then I reinstall the sending unit. During that process, I still kneed the coolant hoses.
It may or may not fix your problem, but it's free and doesn't take long to try it
I'll give it a shot when I get homeOriginally Posted by NewKindOfClown
Officially, the air is supposed to work its way out on its own. In reality, that doesn't always happen.The cleanest way is get the Jeep up to temp and aggressively massage the coolant hoses, squeezing then firmly in different places on each hose. The pressure fluctuations can push out trapped air.
The method I normally use is to raise the rear end of the vehicle so the temperature sending unit at the back of the head is the highest point in the system. I remove the sending unit while the coolant is cold, run it until no more air is coming out of that port, and then I reinstall the sending unit. During that process, I still kneed the coolant hoses.
It may or may not fix your problem, but it's free and doesn't take long to try it
Seasoned Member
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#2 yes
#3 you do a lot of water crossings? Snorkels look cool but there are a lot of drawbacks.
What kind of drawbacks? I don't want any drawbacks lol. Aerodynamics? No I don't do a lot of water crossings I just think it could help a little with water but obviously water will never get above the hoodOriginally Posted by wizardpc
#1 yes#2 yes
#3 you do a lot of water crossings? Snorkels look cool but there are a lot of drawbacks.
Moderator of Jeeps
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I suggest looking at the "cowl snorkel" upgrade option if you haven't yet. It increases your fording ability without sacrificing powerOriginally Posted by mannydantyla
What kind of drawbacks? I don't want any drawbacks lol. Aerodynamics? No I don't do a lot of water crossings I just think it could help a little with water but obviously water will never get above the hood
CF Veteran
Well I made it back, but then I went to the auto parts store and it was hesitating really bad and barely had any power at all and I thought I was going to be stuck on the side of the road. I think it may be something in the fuel system since it felt like the one time I ran out of gas. I'm really hoping it isn't the fuel pump, but anyone have any suggestions of the best place to look? I plan to run to the parts store and grab a fuel pressure gauge and see where it's at. Speaking of, does anyone know off the top of their head what the pressure should be?
Quote:
The cleanest way is get the Jeep up to temp and aggressively massage the coolant hoses, squeezing then firmly in different places on each hose. The pressure fluctuations can push out trapped air.
The method I normally use is to raise the rear end of the vehicle so the temperature sending unit at the back of the head is the highest point in the system. I remove the sending unit while the coolant is cold, run it until no more air is coming out of that port, and then I reinstall the sending unit. During that process, I still kneed the coolant hoses.
It may or may not fix your problem, but it's free and doesn't take long to try it
lol... funny thing is, I was just thinking that doing it like that would probably work, then I read this.Originally Posted by NewKindOfClown
Officially, the air is supposed to work its way out on its own. In reality, that doesn't always happen.The cleanest way is get the Jeep up to temp and aggressively massage the coolant hoses, squeezing then firmly in different places on each hose. The pressure fluctuations can push out trapped air.
The method I normally use is to raise the rear end of the vehicle so the temperature sending unit at the back of the head is the highest point in the system. I remove the sending unit while the coolant is cold, run it until no more air is coming out of that port, and then I reinstall the sending unit. During that process, I still kneed the coolant hoses.
It may or may not fix your problem, but it's free and doesn't take long to try it
Quote:
31 PSI at idle and 39 PSI at WOTOriginally Posted by SatiricalHen
Well I made it back, but then I went to the auto parts store and it was hesitating really bad and barely had any power at all and I thought I was going to be stuck on the side of the road. I think it may be something in the fuel system since it felt like the one time I ran out of gas. I'm really hoping it isn't the fuel pump, but anyone have any suggestions of the best place to look? I plan to run to the parts store and grab a fuel pressure gauge and see where it's at. Speaking of, does anyone know off the top of their head what the pressure should be?
Don't automatically jump to the fuel pump. Could be the fuel pressure regulator on the rail, could be the o-rings on the FPR, could be the fuel filter too... especially if the truck sat for a while.
CF Veteran
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Don't automatically jump to the fuel pump. Could be the fuel pressure regulator on the rail, could be the o-rings on the FPR, could be the fuel filter too... especially if the truck sat for a while.
29ish at idle and when I give it gas it drops to mid 20s I went ahead and grabbed a fuel filter while I was at the parts store so I might just throw it in since it had sat.Originally Posted by Basslicks
lol... funny thing is, I was just thinking that doing it like that would probably work, then I read this.31 PSI at idle and 39 PSI at WOTDon't automatically jump to the fuel pump. Could be the fuel pressure regulator on the rail, could be the o-rings on the FPR, could be the fuel filter too... especially if the truck sat for a while.
CF Veteran
Haven't test drove it yet because I can't find where I put the stupid cap for the fuel rail and I don't want to drive off with it on the jeep somewhere, but I think even if it wasn't the fuel filter it needed to be replaced anyway 
that's the color of the gas that came out
EDIT: update after test drive. Much better, much more power and the fuel pump is silent instead of the buzzing it usually has. Still has a hesitation around 2000 rpms and is a little jumpy, but if I shift there's no more hesitation, or if I just floor it from a stop it'll go all the way to redline without any hesitation, just cruising at or slow acceleration around 2000 rpms gives me hesitation.
that's the color of the gas that came outEDIT: update after test drive. Much better, much more power and the fuel pump is silent instead of the buzzing it usually has. Still has a hesitation around 2000 rpms and is a little jumpy, but if I shift there's no more hesitation, or if I just floor it from a stop it'll go all the way to redline without any hesitation, just cruising at or slow acceleration around 2000 rpms gives me hesitation.