2005 Rubicon Sahara LJ, Manual Tranny.
Engine mods: MCAI
PCM was replaced by the dealer a couple of years ago under federal emissions warranty. All regular maintenance has been accomplished by me. The Jeep has never had a problem.
Temperatures for the past few weeks have regularly been in the single digits and even into the negatives.
The issue:
Thursday night I drove my jeep home, threw a gallon of gas in it due to a slow gas pump, and parked my Jeep in the driveway with just a few gals in the tank. At 9 pm I plugged in my block heater.
Friday morning I went out to the Jeep and it wouldn't start.
The Jeep cranks just fine, it just won't fire. A few days ago it felt like it wasn't going to start, took a while to catch, but fired off with no subsequent problems. This time, it's not even trying to fire.
Here's what I know:
Fuel pump is making noise
Fuel pump relay is good
No blown fuses
Does not start using starting fluid. Doesn't even try to start.
Tail pipe is dry
Fuel gauge reads full when the tank is less than 1/4. Sometimes slowly drops to 1/2 tank. Isn't accurate.
No loose connections that I can see
Codes (summarized):
2096 - Lean condition
0627 - Fuel pump circuit open
0112 - IAC low
0516 - Batt temp circuit low
0072 - Ambient temp low
0462 - Fuel level circuit low
0562 - Voltage low
0340 - Camshaft psn sensor
0335 - Cranshaft psn sensor
0838 - 4wd
0117 - cooland low
0107 - mani low
0122 - tps voltage low
0580 - cruise ctrl
Yesterday I sent the Jeep to a mechanic. (I know, bummer)
The mechanic says he can't get any voltage off the TPS and some other sensors. Something about not getting 12v from the computer (phone was fuzzy). His snap-on computer can't clear the codes and disconnecting the battery also hasn't cleared codes. He hasn't had a chance to check for spark before the shop closed. He feels confident that it's the PCM.
I'm having a hard time believing that overnight the PCM went bad. However, the mechanic's inability to clear codes has me concerned.
The mechanic doesn't open again until Monday. I need some ideas to have a good conversation with him about potential options. Without having the Jeep in front of me, I'm out of schlitz.
Engine mods: MCAI
PCM was replaced by the dealer a couple of years ago under federal emissions warranty. All regular maintenance has been accomplished by me. The Jeep has never had a problem.
Temperatures for the past few weeks have regularly been in the single digits and even into the negatives.
The issue:
Thursday night I drove my jeep home, threw a gallon of gas in it due to a slow gas pump, and parked my Jeep in the driveway with just a few gals in the tank. At 9 pm I plugged in my block heater.
Friday morning I went out to the Jeep and it wouldn't start.
The Jeep cranks just fine, it just won't fire. A few days ago it felt like it wasn't going to start, took a while to catch, but fired off with no subsequent problems. This time, it's not even trying to fire.
Here's what I know:
Fuel pump is making noise
Fuel pump relay is good
No blown fuses
Does not start using starting fluid. Doesn't even try to start.
Tail pipe is dry
Fuel gauge reads full when the tank is less than 1/4. Sometimes slowly drops to 1/2 tank. Isn't accurate.
No loose connections that I can see
Codes (summarized):
2096 - Lean condition
0627 - Fuel pump circuit open
0112 - IAC low
0516 - Batt temp circuit low
0072 - Ambient temp low
0462 - Fuel level circuit low
0562 - Voltage low
0340 - Camshaft psn sensor
0335 - Cranshaft psn sensor
0838 - 4wd
0117 - cooland low
0107 - mani low
0122 - tps voltage low
0580 - cruise ctrl
Yesterday I sent the Jeep to a mechanic. (I know, bummer)
The mechanic says he can't get any voltage off the TPS and some other sensors. Something about not getting 12v from the computer (phone was fuzzy). His snap-on computer can't clear the codes and disconnecting the battery also hasn't cleared codes. He hasn't had a chance to check for spark before the shop closed. He feels confident that it's the PCM.
I'm having a hard time believing that overnight the PCM went bad. However, the mechanic's inability to clear codes has me concerned.
The mechanic doesn't open again until Monday. I need some ideas to have a good conversation with him about potential options. Without having the Jeep in front of me, I'm out of schlitz.