84 50th ecu code 12

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84 50th ecu code 12

Postby 84zman » Wed Jun 24, 2015 2:00 am

Ho guys I'm new to nistune I'm the owner of Zx Auto Center in Jacksonville Fl I know Z's well I'm new to ecu tuning nistune board has connection no issues there. the car is setup with jimwolftech 450hp package ran well for years no wiring issues but since I swtiched to nistune having issues with code 12 for maf I have a friend that got me a jwt88t map setup so i didn't have to do much tuning tell dyno .the ecu I had nistune done on is a 88 Na ecu .should I switch to stock maf to see if code 12 goes away ? the car running super rich and chokes at 2500rpm like when u have a bad maf I have two cobra mafs ive switched with no change

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Re: 84 50th ecu code 12

Postby Matt » Thu Jun 25, 2015 12:28 pm

The JWT code may have made adjustments for the Cobra MAF. Check the MAF voltage. If it drops below 1 volt it will raise the 12 (AFM fault code)

It may be necessary to take the JWT ROM chip and copy that into the Nistune board to resolve this issue. Contact via email for this one. Not a software bug

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