Need help. Idle problem.
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Joined: Sep 2011
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From: nj
Need help. Idle problem.
Hi guys I have a 98 ls1 stock engine with a vortec supercharger 3.8 pulley installed. 60lbs injectors and a greedy blow off valve. Since day one on my current tune the car has an odd idle. It goes from 800 rpm and drops to let's say 300 rpm and back up and does that alternating every second. And won't stop.
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Joined: Sep 2011
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From: nj
Thanks for reply I don't have a tuner the car was built in my garage and tuned by me with HP tuners with a little help from a few people along the way but I don't know how to attack the idle issue.
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From: St. Joseph MO
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Using the forums boards for whichever tuner package you use (EFILive or HP Tuners), read up on idle surge and flare control.Take your time and understand how the min/max tables affect actual commanded spark. Make sure your fuel trims are good and just take your time dialing it in.
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Joined: Sep 2011
Posts: 568
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From: nj
Hi guys at idle with 60lbs injectors my tuner put 400 rpm and 800 rpm the pulses at .805 then at 1200 rpm up he put 1.277 should it be 1.277 across the board and I noticed my spark advance at idle on my oem tune cylinder air mass is at .36 to .84 goes -7 up until 1200 rpm but on my supercharged tune they have it at +8 could this cause irratic idle issues? My idle fluctuates a lot when the car is
