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Post by Lucid on Apr 1, 2010 22:02:33 GMT -5
I didnt like the way my car has been idling lately, its been pretty choppy in gear, so I pulled the chip and flashed it with a target idle speed deadband in drive of 15 RPM. With the car in gear and my foot on the brake the car would buck and rock back and forth. I went back to flash the chip again and my chip died, with no spares...
I borrowed the chip from the other car and reset the target deadband to 25 RPM and it seems to tolerate it much better. Its a tiny bit choppy, but not by much.
I also looked at my Spark Tables and found a few inconsistencies where the spark would increase and one or two cells would decrease and then the following cells would increase again. I made all the spark ramps linear and adjusted the MAF tables again. Make sure the starting value in each following MAF table is equal to or greater the last value in the table before it.
The very first line in my timing had a whole bunch of 10.90 degree values and my base was set at 13 BTDC. I adjusted all those values to 13 and the car seems pretty responsive. I am thinking of adjusting those values down again and lowering the base timing, this car wants to just get up and go.
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Post by z28camaroracer on Apr 2, 2010 19:43:58 GMT -5
If you need some chips I have a few extras that need to be cleared and reflashed.
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Post by Lucid on Apr 14, 2010 21:14:39 GMT -5
I bought a bunch of new chips, thanks for the offer.
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Post by Lucid on Oct 24, 2010 0:48:06 GMT -5
The last time we met up at Bigs (?) when I pulled the chip for you to read, that chip died on me, and thats why it was running funny after I reinserted it.
I couldnt figure out which tune it was, since I do a lot of revisions, and the car has always run pretty choppy at idle since. I finally figured out what the difference was: those 02 tables that we were tinkering with and restored the nice tune I had on it tonight.
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Post by Lucid on Dec 17, 2010 1:38:05 GMT -5
I hooked up my ALDL cable and saw how lean I was running at idle and it kept setting a code. I reversed all the 02 tweaks and then did the MAF tables and richened them up a bit. Car idles very nicely now and most of the choppiness is gone. For those of you wanting to add MAF volts into your datalogging session, and compare them with the corresponding MAF grams/sec airflow, I created this thread to make it easy in Tunerpro. www.thirdgen.org/techboard/diy-prom/596895-adding-maf-voltage-tunerpro.html
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