racingmason
Well-Known Member
Will Lund look at your logs? It thought they went back and did revisions for free with in a certain amount of time? I have random cold start issues depending on the ambient temp. When it was below 50 degrees outside there was a lot of hesitation below 2000 rpm, in fact WOT would barely keep the car moving forward in 1st gear below 2k. I data logged the issue and it was fixed the next morning with a revision. I don't use Lund but I figure they would look at it for you. FI cars can be finicky and I never expected my car to run as "smooth" as it did on the factory tune.Okay maybe you gents can help me out. Unfortunately I am NOT running the Whipple software, but the car has been dyno tuned via Lund. I've been dealing with erratic fuel trims for like 2 weeks. At first, car hesitated to start and idled rough, out of NO WHERE. I've put 16K miles on the car, and it's had the Whipple since 400 miles ( 26K now ) and had no issues. Replaced plugs, gapped .028, and my cold start hesitation ( not wanting to turn over or idle ) is gone, but the erratic fuel trims haven't. Figured maybe vacuum leak, but can't find anything. If it was the O-Ring in the intake manifold I feel like I would've noticed it by now, unless some how it's come apart?
Decided maybe I had a melted/failed cat, and had cat deletes put on, still not different ( rear O2 and cat ot are turned off ) I've got no codes, trims seem spot on at cruising 2500-3000, but it's weird. I'll see -15 or so at start up, and once the cars warmed up, it works it way back to 0 (STFT1) and jumps around a bit but it's almost like it learns as it goes? I wouldn't think low compression since it seems like it's got plenty of power, and actually still adds 2-3 degrees of timing
Anyone experienced anything like this?
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