I've recently installed a WAR chip, MAF conversion, and full Borla exhaust with high-flow cat and headers on my '89 325i. Idle was great before the upgrade, but now I get a surging idle when cold (or even after a short stop when warm) that will run from 700rpm to 1000-1100rpm. I'm also running a tune sent from Brody at Miller.
I've triple checked all potential intake leaks, my ICV is spinning and good, and I've tried adjusting the idle fuel and idle speed up and down. Any other ideas?
I've triple checked all potential intake leaks, my ICV is spinning and good, and I've tried adjusting the idle fuel and idle speed up and down. Any other ideas?
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