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Hey guys, I've been having random stalling issues with my gtr for awhile now so I figured I may as well post about it. The problem is very inconsistent, unpredictable, and varies in its severity.
The common symptom will be that if I'm in neutral, the idle will drop for a second, then go back and forth a few times. Other times it is more severe and the car will stall. It also happens under acceleration/cruising, where I will lose some, or all power for different periods of time.
From what I've read it sounds like its a MAF problem. I checked the ECU diagnostics and it gave me code 12, which is for the MAF sensors. The first thing I did was clean them with MAF cleaner, and resoldered the internal connections. Afterwards it ran fine for a couple hours, I thought I had fixed the problem, but to my frustration it started acting up again. I checked the diagnostics again and it gave me code 55.....which is supposed to mean that everything checks out, but it clearly isn't running properly. Then I bought new MAFs and installed them. Again, it ran fine for a long enough period of time that I thought the problem was fixed, but no dice.
When I had it out the other day it did its usual symptoms: ran fine for the first half hour or so of driving, then started to act up. I would think that it's something heat related but the last time I started it up, it had been sitting for 8+ hours and stalled right off the bat. On my last drive it went into limp mode for the first time (wouldn't rev above 2500ish rpm), so I pulled over to give it a rest, reset the ecu, and then it ran better (but not perfect).
Anyway sorry to ramble on here, I'm just looking for some advice on what I should do next. It could be plugs, coils, or cas from what I've read, but the code from the ECU has me thinking its the MAFS, I just don't know what to do next.
The common symptom will be that if I'm in neutral, the idle will drop for a second, then go back and forth a few times. Other times it is more severe and the car will stall. It also happens under acceleration/cruising, where I will lose some, or all power for different periods of time.
From what I've read it sounds like its a MAF problem. I checked the ECU diagnostics and it gave me code 12, which is for the MAF sensors. The first thing I did was clean them with MAF cleaner, and resoldered the internal connections. Afterwards it ran fine for a couple hours, I thought I had fixed the problem, but to my frustration it started acting up again. I checked the diagnostics again and it gave me code 55.....which is supposed to mean that everything checks out, but it clearly isn't running properly. Then I bought new MAFs and installed them. Again, it ran fine for a long enough period of time that I thought the problem was fixed, but no dice.
When I had it out the other day it did its usual symptoms: ran fine for the first half hour or so of driving, then started to act up. I would think that it's something heat related but the last time I started it up, it had been sitting for 8+ hours and stalled right off the bat. On my last drive it went into limp mode for the first time (wouldn't rev above 2500ish rpm), so I pulled over to give it a rest, reset the ecu, and then it ran better (but not perfect).
Anyway sorry to ramble on here, I'm just looking for some advice on what I should do next. It could be plugs, coils, or cas from what I've read, but the code from the ECU has me thinking its the MAFS, I just don't know what to do next.
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