Finished my tune (with a lot of help from yall) Couple questions
11-20-2007, 02:47 PM
#1
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Finished my tune (with a lot of help from yall) Couple questions LFTF
Is it good to have LFTFs disabled? I dont see any problems right now.
well thats really the only question i have.lol, if someone can look over the tune to see if any defects are in there, please. Thanks
Is it good to have LFTFs disabled? I dont see any problems right now.
well thats really the only question i have.lol, if someone can look over the tune to see if any defects are in there, please. Thanks
11-26-2007, 11:05 PM
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I reran into a previoius problem, today.
Situation: 90 degrees all day, car was running for about an hour all interstate. came to stop and go, car dies after 5 mins. I try to crank up and it starts up but idles at 700ish, as soon as i pump the gas idle drops really low, take my foot off it comes back up, but slowly dies. dont know why. here is a recent log of my drive home, it started acting up miles from the house, but ran good the rest of the way. thanks for all the help so far edcmat-l1
Situation: 90 degrees all day, car was running for about an hour all interstate. came to stop and go, car dies after 5 mins. I try to crank up and it starts up but idles at 700ish, as soon as i pump the gas idle drops really low, take my foot off it comes back up, but slowly dies. dont know why. here is a recent log of my drive home, it started acting up miles from the house, but ran good the rest of the way. thanks for all the help so far edcmat-l1
11-28-2007, 04:33 PM
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I took another ride today, scanned twice, first time was idling cold, then i drove to the parts store. Didnt get on it, just drove. I noticed that starting at frame 1418 in the driving log my stfts JUMP drastically, and If I understand these correctly, they should be withing +/- 5. What is making mine go up so rapidly? Then at frame 1458ish My O2 banks start doing the wave. Frame 45 - 110 is my exhaust rattling HARD, it stops after a second. Which tables should I be looking at fixing?
12-02-2007, 10:53 PM
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WOOOOOOOOOOOOOOOOOOOOW. GOOD and the bad
Good - took your advice and scanned then modified the edit. 11 edits later, I have it pretty much +/- 5 at cruise. I smoothed it out and it has trouble starting cold. but i can fix that.
BAD - I was able to drive it for more then an hour today. same tune. For the first hour, PERFECT. but then hour or so after driving, numerous stops, and on the way back home the stft take a turn and go lean. a constant rise. Dont know whats happening. Then the car started dying again. My car died at frame 7258 (on the scan file sd_j). My stft climbed up to 50. If you look at sd_i (which was the first part of the drive) its really good. I dont know what could of happened. This is the second time it has done this.
Could it be a voltage problem?
Good - took your advice and scanned then modified the edit. 11 edits later, I have it pretty much +/- 5 at cruise. I smoothed it out and it has trouble starting cold. but i can fix that.
BAD - I was able to drive it for more then an hour today. same tune. For the first hour, PERFECT. but then hour or so after driving, numerous stops, and on the way back home the stft take a turn and go lean. a constant rise. Dont know whats happening. Then the car started dying again. My car died at frame 7258 (on the scan file sd_j). My stft climbed up to 50. If you look at sd_i (which was the first part of the drive) its really good. I dont know what could of happened. This is the second time it has done this.
Could it be a voltage problem?
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12-04-2007, 07:54 PM
#10
You got a fuel pressure gauge? Its forcing the fuel trims way positive, but the 02s stay the same. Looks to me like its probably loosing fuel pressure. I wouldnt do anymore tuning til ya get a FP gauge on it. Theres gotta be a reason, that doesnt just happen.
12-04-2007, 11:51 PM
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i dont have one, i will go and get one that screws on to the rails. are my factory ls1 rails not enough? have an aftermarket fuel pump with 48lbers on the other end. But my Duty cycle doesnt come close to maxing out.
