I had some issues with my '95 F-150 that some of you were able to help with a month or so ago. I got a little closer to fixing the trucks issues but one of those problems is still sticking around. The truck will send KOEO and CM codes, but will not send KOER codes. Has anyone ever experienced this? It's been hooked up to four different code readers (mine and three at two different shops in town) and will not give any feedback. Any ideas?
Thanks,
Thomas

 

Maybe it's female!!!


I wish I could answer your question, but it don't make sense to me either.. But, I just could not pass up an opening for a wisecrack... Good luck with it..

Are you having any particular problems with it? If so some of the other symptoms might spark an intelligent thought here with these guys..

 

Ha, good one.
It burns extremely rich, which causes terrible idle and trouble accelerating when cold and lack of power throughout the band warm or cold. It gets about 6 mpg because of all of this. The only really relevant code that it displays in the KOEO and CM modes refers to a grounded spout connector. I've looked into it as have two mechanics no one has been able to track that down or get any streaming codes during a KOER test. It's a stumper.

 

If you don't have a leaking or otherwise messed up fuel pressure regulator and the fuel pressure is where it should be(40psi no vacuum), and you don't have the fuel transfer problem that sometimes floods the vents and vapor canister, and you don't have a bad MAP sensor if the truck is SD, then it sounds like your computer is fried.

 

The truck has a single tank and the last mechanic it was at verified that the fuel pump was within specs and the fuel pressure was as well. What is SD that you are referring to?

 

SD stands for Speed Density; it's the programming they used to control fuel injection before they swapped to Mass Air Flow (MAF).
SD uses input from the Manifold Absolute Pressure (MAP) sensor and engine RPMs to calculate how dense the air comming into the engine is.
Once it "figures out" what the air density "probably is" then it adjusts injector spray duration.

Ford Fuel Injection is one of the most informative websites I have ever been to, and will tell you all about the different programs.

 

If it has a 4R70W transmission and 5.0L then you do not have SD, you will have MAF system.
This would also apply to a California sold truck.

Sounds like it may be running in limp mode. What are all of the codes?
A grounded SPOUT wire may put it in limp mode. You will need to ohm-out the SPOUT wire and maybe unwrap the wiring harness to find the short to ground.

You should not even try to run a KOER self-test until all of the KOEO & CM codes are addressed.

 

The truck is a 5.0 and started life as a 5 speed manual but a c-6 was swapped in before I bought it. The codes that were flashed when the engine was warmed up:

KOEO; 67 (Neutral safety switch)

CM; 18 (IDM circuit failure or SPOUT circuit grounded), 34 (PFE or EVP circuit has intermittently failed above the closed limit of 0.67 volts), 41 (HEGO sensor circuit indicates system lean (right side))

On a different note, I noticed after I turned off the ignition after warming up the engine there was a buzzing coming from the coil. Could this be related?

Thomas

 

It sounds like someone also put in the the wrong ICM, it should be a Black one and someone put in a Gray one. That is what the IDM circuit failure or SPOUT circuit grounded code is about.

The lean code may be why it is running rich.

The EGR valve may not be closing all the way.

 

ICM, Ignition Control Module? If thats what it is, don't I have to remove the distributor to check that?

The EGR system is brand new, I replaced every component of it from the sensors and switches to the down tube (some of them twice).

 

Yes the ICM is the Ignition Control Module.
All trucks 1994 and newer are CCD and require a Black ICM but almost all the auto parts stores will try to sell you the Gray wrong one.
It is mounted on the drivers fender near the firewall.



/

 

i have noticed you said you can't do a KOER test. Me either. i goodled a bunch of stuff today and found out if the neutral safety switch is not hooked up than it will not run the test. i haven't tried it yet so we will see if it works.

 

So it's taken a little time to get back to the truck. One reason was trying to track down the black fender mounted ICM up here in Alaska, not an easy task.
After installing it I still get the same codes, including the Spout grounded code.

This sounded like a great tip and I was really excited until I realized that the neutral safety switch is working to an extent. I do have a B&M shifter installed but I pulled the wires from it and the truck wouldn't start. It wont start in reverse, 2nd or 1st though it will start in drive. I believe that to be due to a maladjusted cable. Seems like a no brainer, but is it safe to assume thats the reason its dropping that code?

 

You may be reading and old code, clear the codes by grounding the STI wire, turn on the key and when the MIL starts to flash remove the ground from the STI wire and your codes will be gone.