Hi All,
I have a 95 F150 with a 302. 131k miles, I am getting the CEL after letting off the accelerator, but it goes out shortly after acceleration and back up to speed. It doesn't sputter, hesitate, shake, nothing abnormal. Few months ago, I replaced all vacuum lines, vacuum canister, EGR valve, EGR solenoid, EVR, spark plugs (Motorcraft) plug wires, (Ford Performance 9) cap and rotor, new serpentine belt and idler tensioner. New AC compressor and Power Steering Pump. All.work was done by me except charging the AC system. Like I said this was all done a couple of months ago. No problems until last week. With no code to look up, and no real problems with the truck running, I am at a loss. Any help is appreciated.

 

Most likely a flaky sensor to cause this - maf, o2, tps; or corroded connections can be problem too

verify 5vdc at the single test connector also

 

What method are you using to pull codes? Are you getting code 111 on both KOEO and KOER?

 

OBD 1 Scan tool. Yep 111 code on both on/off engine reads.

 

Cleaned the MAF, that was my first thought also. Haven't checked o2, or TPS. I will check the 5vac also. Thanks