16DIBEBM
Well-Known Member
- Thread starter
- #1
Car has a cat-back exhaust, Roush CAI, and a tune that I am managing with SCT X4 tuner. I was running the 91 Tune (I'm in CA and 91 is the best we have) with no issues.. ran good. Decided to give the E30 tune a shot - put 4 gallons of E85 (minimum 70% according to label at pump) in the tank with 10 gallons of 91, and installed the E30 tune. Today on my 3rd day of driving it with the tune, I was going to work this morning (cool air, low 70's), and on one of my acceleration runs (I was data logging at the time so I could send it to the tuner to fine-tune it), it sputtered really bad and lost a lot of power .. I immediately let off the gas .. the check engine light was flashing/blinking at me .. after maybe 20-30 seconds, the light went off, and the engine smoothed back out. I completed the data log, and then checked to see if I could retrieve a code, but no luck.
On my way home from work (it was warmer - mid/high 90's), I got on the gas again at one point, and the same thing happened .. sputter at higher RPM (about 4800-5000 or so) and loss of power. Check engine light stayed on this time (I was not data logging) - code was P0301 - cylinder 1 misfire. engine smoothed out again after about 20 seconds.. got home, and per the tuner, I checked my plugs for proper gap - they were all at .028, where he said they should be. Sent him a copy of the data log file from the morning run and he couldn't conclude what happened... said he could turn the boost way down if I wanted. I let him know I was a little concerned about damaging the engine in my brand new car - his response was "put it back to stock".. I was hoping for a bit more assistance in figuring out what the issue was here... of course, I am nervous about damaging the engine in my 2 month old car, and I'm trusting my tuner to sell me a tune that will improve performance but not blow up my engine .. is that too much to ask?
I still have about 1/3 tank of E30 - is it ok to put it back to a stock tune with that in the tank? If the engine is about to blow, I want to have it on the stock tune if that happens.
On my way home from work (it was warmer - mid/high 90's), I got on the gas again at one point, and the same thing happened .. sputter at higher RPM (about 4800-5000 or so) and loss of power. Check engine light stayed on this time (I was not data logging) - code was P0301 - cylinder 1 misfire. engine smoothed out again after about 20 seconds.. got home, and per the tuner, I checked my plugs for proper gap - they were all at .028, where he said they should be. Sent him a copy of the data log file from the morning run and he couldn't conclude what happened... said he could turn the boost way down if I wanted. I let him know I was a little concerned about damaging the engine in my brand new car - his response was "put it back to stock".. I was hoping for a bit more assistance in figuring out what the issue was here... of course, I am nervous about damaging the engine in my 2 month old car, and I'm trusting my tuner to sell me a tune that will improve performance but not blow up my engine .. is that too much to ask?
I still have about 1/3 tank of E30 - is it ok to put it back to a stock tune with that in the tank? If the engine is about to blow, I want to have it on the stock tune if that happens.
Sponsored