Red exhaust manifold
- Thread starter Gasman1979
- Start date
Just took a 15 mile drive. Started out fine. By the time I made round trip it was trying to run hot again and rapidly losing power. I have no fucking clue. I fixed everything that threw a code. Tracked down every single issue that was causing a CEL and made repairs. Next is just gonna be sell it. I’m sick of it after two weeks.
Terrible. -22 ish. Short term is good. Bounces between -2 and +2. I’ve reset the memory several times. Always goes right back. It started to run warm….then borderline hot….after that is runs like absolute shit.
It’s weird none of this is throwing a code. I know you said that you checked the bulb and it was good but have you verified that the PCM will light it. Does it light up when you turn the key on? Maybe try disconnecting a sensor to verify that the PCM is properly triggering the CEL?
I didn’t even think of that. KISS keep it simple stupid
I’ll check it tomorrow. When I get neck deep in something like this I tend to over analyze and skip the obviousI may not be explaining this very well, but I believe LTFT is designed to show the "new normal". If the engine is running perfectly the LT will be at or near zero and the short term will adjust from there according to the rich/lean indicted by the O2 sensor (and others). You're starting point is now -22, and short term is adjusting up or down from that point. Long and short are not independent of each other.
Yessir I agree 100% with whatcha said. Something is causing the LT to be way off into negative land. When I clear the memory it doesn’t take long for the LT to creep right back to the low 20’s range. I’m going to verify the timing isn’t retarded tomorrow.
I didn’t even think of that. KISS keep it simple stupid
Before you start digging into it today, with the engine still cold plug in your scan tool and pull up the coolant temp pid. See if the temperature the PCM sees is the same or close to ambient temperature with a cold engine.
Yessir. I’ll do that today. If that sensor is reading wrong it will effect timing for sure and is one of few I haven’t changed yet.
That's a good way of putting it. The new norm. Even though in this case the new norm is abnormal and will return to normal once fixed.
I like the way he explained it. Made a bit more sense cause I didn’t know the LT was like the new preset. I knew ST was immediate small corrections. Good info.
I talked to the guy I traded with for it today. He said he didn’t do much outside the timing chain kit. And he said he is certain he had the marks right. He owns other jeeps and seems pretty competent. He did share with me that the PO before him fancied himself a mechanic but wasn’t even shade tree level. So there is god knows what done behind the scenes I’ll have to undo. I’m gonna just get to basics today and verify mechanical timing is right and move from there.
There is no anti theft on these rigs is there ? I wonder if it comes down to it if I can get a used ECM and swap it ? I am just thinking out loud before I have researched it any. Might need programming. I have the stuff to do it, it’s just a huge pain and cost $99 for the one time data plug for the specific rig you’re programming.
I have a tune on my jeep since I tuned it,My header from ARH likes to glow red or purple ish when I'm having fun,they get very bright but no overheating though 
Like mac said your jeep may have a tune? Stock tunes tend to run a bit rich and cause of that i leaned my tune out a bit added timing etc. Etc. and gained quiet a bit of power comapred to the stock tune
I did encounter the same problem of the LT when looking at my afrs. On HpTuners,Replaced the 02 sensors with new Ntk units and for some reason only 1 of them was bad and was throwing my readings off! Added more fuel trim here and there to make my afrs a bit happier and no more lean fuel trim codes!
You got a strange case my man
Like mac said your jeep may have a tune? Stock tunes tend to run a bit rich and cause of that i leaned my tune out a bit added timing etc. Etc. and gained quiet a bit of power comapred to the stock tune
I did encounter the same problem of the LT when looking at my afrs. On HpTuners,Replaced the 02 sensors with new Ntk units and for some reason only 1 of them was bad and was throwing my readings off! Added more fuel trim here and there to make my afrs a bit happier and no more lean fuel trim codes!
You got a strange case my man
I have a tune on my jeep since I tuned it,My header from ARH likes to glow red or purple ish when I'm having fun,they get very bright but no overheating though
Like mac said your jeep may have a tune? Stock tunes tend to run a bit rich and cause of that i leaned my tune out a bit added timing etc. Etc. and gained quiet a bit of power comapred to the stock tune
I did encounter the same problem of the LT when looking at my afrs. On HpTuners,Replaced the 02 sensors with new Ntk units and for some reason only 1 of them was bad and was throwing my readings off! Added more fuel trim here and there to make my afrs a bit happier and no more lean fuel trim codes!
You got a strange case my man
View attachment 544821
View attachment 544824
That’s pretty warm. But I think you could open my hood and land helicopters by the glow it’s so bright
.
That’s pretty warm. But I think you could open my hood and land helicopters by the glow it’s so bright
MO BRIGHTAAH
At the center is the 1st cylinder,center of the bottom us the 6to1 collector
This was on the side of the street from what I remember,I told myself "After all that I wonder what my header looks like *opens hood*.......OH DAMN,she's a bit hot
! "Didn't bother going under the jeep to snap more pictures cause again,I was on the side of a road
Edit- I've had this header for a few thousand miles and many heat cycles of them getting cherry red/orange and they hold up great, Same with the header washer&stud kit from Jezza
MO BRIGHTAAH
At the center is the 1st cylinder,center of the bottom us the 6to1 collector
This was on the side of the street from what I remember,I told myself "After all that I wonder what my header looks like *opens hood*.......OH DAMN,she's a bit hot
Didn't bother going under the jeep to snap more pictures cause again,I was on the side of a road
Edit- I've had this header for a few thousand miles and many heat cycles of them getting cherry red/orange and they hold up great, Same with the header washer&stud kit from Jezza
lol. Mine is the brightest on cylinders 2 and 3. Right in the middle. Dunno why except those two are smashed together and the heat is combining there whereas the front and back is kinda solo. I had to take the scanners back to the shop today so they would have them for work. I’m about to buy an Icon T8. It says it’ll do everything I want it to do with two years of upgrades for $899. I work on enough cars and friends cars it will be handy to have around.
If you want...contact @Wranglerfix or www.wranglerfix.com. You can send Mark your PCM and he can test it and see if it's a stock tune.
Mark allegedly has a secret sauce tune, too that makes TJs much less picky about sensors.
-Mac
Mark allegedly has a secret sauce tune, too that makes TJs much less picky about sensors.
-Mac
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