2014 Rogue Select (=old body style apparently) with 2.5L, 134k miles
Vehicle stalled at a stop the other day. According to owner it "revved" then sputtered and died. Vehicle would ALWAYS restart but stall within seconds.
In the course of troubleshooting I found if I kept it 2-3k rpm it would stay running. After enough of this it seemingly relearned fuel and/or throttle trims enough to run on its own.
Right now STFT is pegged (apparently) at +25. So, it's obviously adding a ton of fuel. When it's doing this it runs fairly well, but you can still hear a hiccup at tailpipe. Periodically it'll pull STFT to 0 and then stumbles badly, eventually returning STFT to +25.
Day 1 of test driving STFT was essentially binary: either 0 or 25. Even when driving under light acceleration or coasting it'd be 25, periodically trying 0 again (you could tell, too). Under heavier acceleration it would sometimes use a trim between 0 and 25.
Day 2 of test driving overall driveability was the same but it started to ALWAYS run STFT at 0 when off the accelerator, and 25 the second you touched the accelerator at all. Coming to a stop at idle returning to 25. THEN for a brief while STFT numbers started to look more normal while driving, running throughout the range and corresponding to demand. Coming to a stop returned to +25
CODES: I'm only getting a P0300 in stored or pending. ONCE I got a P0302 so I swapped the coil from 2 to 1, but have been unable to get another individual cylinder code.
PLUGS: they're Autolites so replaced at some point. They don't look stellar but I feel like throwing 4 plugs at it right now is an act of desperation.
VACCUM LEAKS: was unable to find anything with my smoke machine.
VVT SOLENOIDS: this would be nice but I'd sure love to see a code for one and I'm not getting any.
THROTTLE BODY: from what I can see looks relatively clean. Butterfly seems to move freely
ENGINE OIL LEVEL: full and appears clean
Basically, lacking codes for an individual cylinder, electronic throttle, VVT solenoids, MAF or O2 sensor (the latter I believe being irrelevant as symptoms are present even when stone cold), I'm unwilling to just throw parts at it.
I'm seriously beginning to ponder jumped timing which is apparently not unheard of on the 2.5. Presently I'm lacking a scope so I'm inclined to kick it down the road for a second (better) opinion but wanted to run it by BITOG first.
Vehicle stalled at a stop the other day. According to owner it "revved" then sputtered and died. Vehicle would ALWAYS restart but stall within seconds.
In the course of troubleshooting I found if I kept it 2-3k rpm it would stay running. After enough of this it seemingly relearned fuel and/or throttle trims enough to run on its own.
Right now STFT is pegged (apparently) at +25. So, it's obviously adding a ton of fuel. When it's doing this it runs fairly well, but you can still hear a hiccup at tailpipe. Periodically it'll pull STFT to 0 and then stumbles badly, eventually returning STFT to +25.
Day 1 of test driving STFT was essentially binary: either 0 or 25. Even when driving under light acceleration or coasting it'd be 25, periodically trying 0 again (you could tell, too). Under heavier acceleration it would sometimes use a trim between 0 and 25.
Day 2 of test driving overall driveability was the same but it started to ALWAYS run STFT at 0 when off the accelerator, and 25 the second you touched the accelerator at all. Coming to a stop at idle returning to 25. THEN for a brief while STFT numbers started to look more normal while driving, running throughout the range and corresponding to demand. Coming to a stop returned to +25
CODES: I'm only getting a P0300 in stored or pending. ONCE I got a P0302 so I swapped the coil from 2 to 1, but have been unable to get another individual cylinder code.
PLUGS: they're Autolites so replaced at some point. They don't look stellar but I feel like throwing 4 plugs at it right now is an act of desperation.
VACCUM LEAKS: was unable to find anything with my smoke machine.
VVT SOLENOIDS: this would be nice but I'd sure love to see a code for one and I'm not getting any.
THROTTLE BODY: from what I can see looks relatively clean. Butterfly seems to move freely
ENGINE OIL LEVEL: full and appears clean
Basically, lacking codes for an individual cylinder, electronic throttle, VVT solenoids, MAF or O2 sensor (the latter I believe being irrelevant as symptoms are present even when stone cold), I'm unwilling to just throw parts at it.
I'm seriously beginning to ponder jumped timing which is apparently not unheard of on the 2.5. Presently I'm lacking a scope so I'm inclined to kick it down the road for a second (better) opinion but wanted to run it by BITOG first.