DIY PROMDo It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.
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I just wired everything in as the tech article specified for the ecm swap from '870 to '165. I must have done somthing wrong because the MAF Burn-off relay is constantly humming when the battery is connected.
It is not surprissing that the car runs like crap. Where should I start? It seems that the relay is reciving voltage all the time when it shouldn't
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__________________ Blue 5-Speed TPI 85' Z28 Hardtop 60,XXX Miles
mods: $6E '165 MAF ECM Swap, Hedman Shorties to a 2.5" cutout,LS1 Driveshaft, Zexel Torsen Posi, Center Force DF clutch, Hurst Short Throw Shifter, Comp 1.6 magnum rockers, Modified stock TPI w/ SLP runners, Sphon LCA, Panhard Bar, and SFCs, free mods
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As a follow up the Maf burnoff relay was removed and reinserted trouble cleared, no humming.
I would suspect dirty contacts that were "cleaned" by removing and reinstalling the relay. The humming was probably due to low coil voltage, not fully pulling in the relay armature.
I'm troubleshooting an unrelated issue on my 7730 conversion and I ran across the MAF burnoff relay, long since unplugged for the same reason and forgotten. Once I figured out what the relay was I remembered.
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1987 Iroc 5.7 - Megasquirt II 3.0, WB O2, 3 Bar, single T70 turbo, 8 psi, Cold AC!
