Inherited this truck from my brother. It has had stalling issues since the day I got it. At first it would only stall when I stopped. It has progessively worsened and will not stay running unless I feather the throttle. It is a 1990 F150 with a 302. I have replaced the following: Plugs, wires, cap, rotor, pcv valve, and filters. I also replaced the IAC, TPS, EGR valve, EGR valve position sensor because of codes. Well, I actually replaced the IAC just because it was only stalling while idling at the time so I thought it made sense.

I am now getting the following codes:

KOEO, 34

KOER, (with wife feathering the throttle) 12, 44, 34, 32, 55, and 21.

Any ideas? I'm going insane here. (That's a short trip for me anyway.)

 

The ECT is fairly cheap so I'd probably change that. You're still having EGR problems unless you didn't erase the codes when you changed the EGR stuff. Check the vacuum lines and check the power at the EGR solenoid.

 

ECT doesn't ring a bell. What is that? I erased the codes after all the replacements were installed. Previously I was getting only codes 23 and 31. All these new codes occurred afterward. I have checked the vacuum lines but not power at the egr. I'll go do that now and post the results.

Thanks

 

coolant temperature, it's right below the throttle body, on a tree with the heater hose.

 

Okay, thanks. I have replaced the ECT and ran self tests again. Got rid of code 12. Here are the new results.

KOEO 34

KOER 44, 45, 34, 32, 55, 24.

Also, what value am I looking for when checking EGR solenoid for power? Anything in particular?