Inertia 500
Active member
I just learned something interesting that I thought I would pass along.
I have an early 1986 coupe with the iron head engine. I bought an Auto X ray E Z Link code scanner. I configured it per the instructions for an 86 model Corvette. All the readings were way off, for instance, RPM at idle was 6500 rpm, coolant temp when the car had not been run in 24 hours was 274 degrees F, intake air temp was -36 degrees F, a trouble code 42 was shown which didn't exist when I put the ECM into diagnostic mode with a jumper, etc. Called Auto X ray customer support and they were clueless. So I changed the configuration to 1985 model and now it works properly.
Maybe the early 86 iron head cars share software with the 85 models?
I have an early 1986 coupe with the iron head engine. I bought an Auto X ray E Z Link code scanner. I configured it per the instructions for an 86 model Corvette. All the readings were way off, for instance, RPM at idle was 6500 rpm, coolant temp when the car had not been run in 24 hours was 274 degrees F, intake air temp was -36 degrees F, a trouble code 42 was shown which didn't exist when I put the ECM into diagnostic mode with a jumper, etc. Called Auto X ray customer support and they were clueless. So I changed the configuration to 1985 model and now it works properly.
Maybe the early 86 iron head cars share software with the 85 models?