I pulled the codes on my truck (1985 F-150 w/300 C-6 2wd) yesterday but don't really know what to think about it. I erased all codes before starting the truck. Then I took it for a 30 minute spin and then came back to pull the codes. On the KOEO (key on engine off) I pulled a 22. MAP sensor out of range. I replaced this about 2 weeks ago. I checked the voltage and it was good. I also checked vacuum at the sensor and it was good.

So, then I did the KOER (key on engine running) test and pulled codes 24, 25, 71, 87 and something else. One is a bad IAC (intake air charge sensor), one is a knock sensor not operating, one is fuel pump relay and then one was that the ECU detected a reset which I assume was when I erased the codes. There was one other code that I can't think of but it was something to do with the EGR position sensor being out of whack. I don't think I have one of those.

1. I don't know if an 85 w/carb has a knock sensor
2. An 85 w/carb w/mech fuel pump shouldn't have a fuel pump relay
3. And I thought that only Fuel Injected engines had the IAC in the intake.

I'm pretty sure I read them correctly because they repeated twice and I don't think the 85's use 3-digit codes. I'm gonna have my wife help me Tuesday night so I can be right in front of the scanner when it's blinking.

I swear it's almost as if I have a 90+ ECU in an 85. But if that was true it wouldn't run right.

I swear I will get this truck to run right one of these days!!!!