Hey all,
First post. Have lurked quite a bit, thanks for all your insight over the years.
I have an 05 TJ Rubicon. A while back, I noticed I was low on gas, hesitated to start later in the day but figured it wasn't due to low gas (gauge read 1/8 tank, and I know there's a reserve). Got it started, filled up, washed him off. Noticed a CEL, so stopped by autozone on the way home. P0508, IAC system circuit low. Now the jeep will crank, but won't start, even with added throttle.
Relevant history (maybe): Had a PCM issue a while back (~4 years, low mileage). The shop I took it to fucked it up a few times. Finally found a new PCM, but they programmed it for an automatic FWD. They corrected this after taking it to a different shop to check their work. Has run fairly well since then, besides maybe some idle issues but never any stalls or difficulty starting. Also recently soldered on a new wire to the front locker actuator if that matters, it broke while out on a solid adventure. No other electrical work has been done, just mechanical stuff.
Steps taken so far: cleaned the throttle body well, as well as the IAC valve (the 05-06 valve is different, so did the best I could). Got it to start once with some throttle encouragement. Ran it hot on freeway speeds to try to free anything up. No stalls or trouble running then. After it was parked, tried to turn it on again with no luck. Has not started since then. Replaced the IAC valve with a new part (Mopar 4861552AC Fuel Injection... https://www.amazon.com/dp/B0049EJPKO?tag=wranglerorg-20), had to use a different bolt on one corner as the old bolt snapped, but that shouldn't cause an issue. Disconnected battery for ~30 minutes to clear codes/temp memory, no luck. Inspected what I could at a glance in my apartment garage (Intake hose, PCM connector that appears to lead to IAC, etc.), nothing abnormal I could see.
Not sure of next steps to take, any advice would be fantastic. Coincidentally, it didnt start the day I was headed to get new tires. Not sure if it could be a fuel pump/relay issue, PCM, or something else. I apologize if this is a double post, I've read a lot of somewhat similar posts, but would appreciate the expert take on this issue.
Happy to finally join!
-Spencer
First post. Have lurked quite a bit, thanks for all your insight over the years.
I have an 05 TJ Rubicon. A while back, I noticed I was low on gas, hesitated to start later in the day but figured it wasn't due to low gas (gauge read 1/8 tank, and I know there's a reserve). Got it started, filled up, washed him off. Noticed a CEL, so stopped by autozone on the way home. P0508, IAC system circuit low. Now the jeep will crank, but won't start, even with added throttle.
Relevant history (maybe): Had a PCM issue a while back (~4 years, low mileage). The shop I took it to fucked it up a few times. Finally found a new PCM, but they programmed it for an automatic FWD. They corrected this after taking it to a different shop to check their work. Has run fairly well since then, besides maybe some idle issues but never any stalls or difficulty starting. Also recently soldered on a new wire to the front locker actuator if that matters, it broke while out on a solid adventure. No other electrical work has been done, just mechanical stuff.
Steps taken so far: cleaned the throttle body well, as well as the IAC valve (the 05-06 valve is different, so did the best I could). Got it to start once with some throttle encouragement. Ran it hot on freeway speeds to try to free anything up. No stalls or trouble running then. After it was parked, tried to turn it on again with no luck. Has not started since then. Replaced the IAC valve with a new part (Mopar 4861552AC Fuel Injection... https://www.amazon.com/dp/B0049EJPKO?tag=wranglerorg-20), had to use a different bolt on one corner as the old bolt snapped, but that shouldn't cause an issue. Disconnected battery for ~30 minutes to clear codes/temp memory, no luck. Inspected what I could at a glance in my apartment garage (Intake hose, PCM connector that appears to lead to IAC, etc.), nothing abnormal I could see.
Not sure of next steps to take, any advice would be fantastic. Coincidentally, it didnt start the day I was headed to get new tires. Not sure if it could be a fuel pump/relay issue, PCM, or something else. I apologize if this is a double post, I've read a lot of somewhat similar posts, but would appreciate the expert take on this issue.
Happy to finally join!
-Spencer
