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Running Lean

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6SENSE

Member
Joined
Jun 3, 2001
Messages
1,635
Since I now have a stock injector thumbwheel chip to use with the stock engine I just put in, I decided to make a few blasts on the highway with TLink.
The engine is running lean.
First off, let me mention that there is a code 44 (O2 sensor LEAN) stored in the ECM. Before, I thought this code was because of the 36# injector chip I had in to get the car started, but obviously not, since it came back after the chip change.
The wastegate rod is not turned up, its adjusted all the way out to where I can slip it on by hand without force. I am still getting 16+ psi boost, I guess from the chip. I have had it in the #3 setting and once or twice in the #4 setting. FP is set at 43psi.
I got as much as 12 degrees of KR. Also had a bad backfire from the intake.
I'll be dam**d if I mess up this motor too! :mad:
O2s look good though, over 800 (812, 824) :confused: . BLMs do not look good (160 at idle, cruising at 140~, and no less than 137 at WOT!). Im not used to this. If anything I always ran rich with the other engine (128~ at idle, 115~ cruising, 128 WOT).

With just my exhaust and air induction mods, I know its not time for the bigger injectors already is it??!!
Are the O2 readings telling me that its not really running lean and the problem is somewhere else? MAF #s were only as high as 208! I could never reach any higher than 240~ with this same MAF on my other engine with the TA33, V1 intake and ported heads. Maybe the MAF is reading lower airflow than is actually present and is the problem? O2 sensor bad? Problem with the chip?
I tried turning up FP (to 47psi), but did not make a difference.

Any ideas?
 
Thumbwheel

Just curious, I looked @ a friends 84 GN recently with a 7 position thumbwheel. Every time he dropped it in gear and tried to give it gas it would die. He put his old chip back in and told me later it was much better.
 
Hmmm, no issues like that, with the engine I just took out or this one. Is he still using a '84 ECM? Mine has always been with '87 ECM.

I swapped out the '87 MAF for a '84 MAF and the block learn #s have gone down. MAF readings with only 14-15~ psi boost shot up to 250. Maybe the '87 MAF that Ive been using for the last couple years has been defective:mad:
Maybe its time to get a translator?
 
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