Thanks for suggesting Don Cruz. However if Eric at TurboTweak and I can't figure this out, I will have it flat bedded to Cal Hartline in Melbourne (about 100 miles north of me). That's the last resort. I hate to give up though!
WTB: Instrument Cluster Bezel, Power Logger, LS1 MAF, Scanmaster G, and more!
- Thread starter MichBC3
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Yep. All checked out except the chip. Currently have Eric at TurboTweak checking a PowerLogger log file that I made. He said he'd check my chip if necessary. Might be zero'ing in on this.
ScottHeidinger
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Looks like your MAF is reading too high. If I remember correctly there is another car in your garage that may have a good MAF sensor. I would swap the MAF from the white car and test it. I assume they both have the stock MAF sensors. Please verify the sensor is not installed backwards as that may also cause issues. I know you said you swapped it out before but maybe the plugs were fouled before? If you’re using a stock sensor I would swap to a translator and a newer sensor LT1 or LS1 style. HTH
Scott
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Scott
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ScottHeidinger
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X2 on O2 sensor. Go back to stock they are cheap to replace
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Ok guys. Thanks for all the help. Time to put this thread to bed. Yes, it turned out to be a bad MAF - as per the high reading (16) which according to Eric is about twice as high as it should have been at idle. The high MAF value was making the ECM throw twice as much fuel into the engine - making it run super rich. As a test, Eric said to make a log with no MAF (the computer would assign a base value). That leaned it out a lot. Instead of seeing 7 to 1 A/F in the Powerlogger, it was about 15 to 1. Because my TTA has an ACCEL Gen 7+ running it, I had a spare MAF that I forgot about. I just installed it and the A/F numbers are now about right. Not perfect, but at least I have the car running off of dead rich which is something that I can work with. I will install a new set of plugs and re-check for any possible vacuum leaks. But chances are that it just needs fresh plugs.
When I was trying to troubleshoot this problem in the previous engine, I borrowed a friend's MAF and saw no difference in the way the car was running. But by the time I tried that, the spark plugs were most likely badly fouled out. It's also possible that my friend's spare was no good. Back then I knew nothing about typical values for MAFs at idle. I didn't have enough experience with MAFs. I am used to the speed density system in the TTA.
When I was trying to troubleshoot this problem in the previous engine, I borrowed a friend's MAF and saw no difference in the way the car was running. But by the time I tried that, the spark plugs were most likely badly fouled out. It's also possible that my friend's spare was no good. Back then I knew nothing about typical values for MAFs at idle. I didn't have enough experience with MAFs. I am used to the speed density system in the TTA.
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Time to dump the stock MAF, and ........
ScottHeidinger
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Yep dump stock MAF...
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And buy what else? Obviously new to this MAF stuff...
Would that be a 3 wire? If so, what part number would you recommend?
Missed it before, but just saw this Scott. I will go offline with you on email. Catch you there.
Just get a stock AC Delco or Denso.
