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Excellent advice above. Make sure to also clean your headlight grounds. Both are located in front of the headlights and above them level with the top of the radiator..
Glad you like the reader. It does make it easier. Did you run both the KOEO AND KOER test? If you only ran the KOEO, get truck to operating temp by idle or driving and run those KOER codes which could show something.
Thank you again for being willing to help. These are the results of a test this afternoon: KOEO - 111, 539 KOER - 111
No other codes even though it shuddered/skipped/stalled several times on the way home.
I can sit in the driveway and rev it up no issues now that it's warmed up. If I turn on the headlights and wipers, it's likely to start doing it's miss/stall. It's seeming like an electrical thing. Right?
Clean your grounds. It sounds stupid, but it fixes alot of stuff like this. Don't just like *look* at them, or spray them down with QD or Deoxit or something, disconnect the battery, and unhook the grounds at their grounding points, and take a wire brush, or sandpaper, or some such to them, and make sure you've got a good bare metal connection.
CODE 539 A/C was on when tested. Hope the ground cleaning helps you.
I removed and cleaned the ground at the driver's side front by the coolant overflow, the one from the batt neg to the passenger's side fender well towards the front, and also the one over by the ECC test port. It seemed to make no difference. I can consistently get it to stall/stutter around 3,000 RPM's with headlights on. With headlights off, it is not as consistent. In fact, it hardly does it all with headlights off. Windshield wiper motor seems to have no effect. Heater blower motor alone seems to have no effect unless used in conjunction with the wipers. However headlights alone will cause the stall/stutter.
I put a volt meter on the battery. 12.5v engine off. 14.5v engine running. Holds between 14v and 14.5v with engine running and lights, wipers, blower motor on. There's no noticeable drop in voltage even when the stall/stutter hits. I'm going to clear the codes, drive it again tomorrow, and check codes again.
So, I cleared codes yesterday. Drove it to work and back today. Ran the tests today.
KOEO - 111, But in continuous mem it found the 212 code again. KOER - 111
No other codes even though it's still shuddering/skipping/stalling at times.
Headlights still seem to make it worse.
Remember the truck has new black ICM, coil, plugs, plug wires, rotor, cap. Voltage across batter hold steady over 14v with accessories running and even during the skip/stall/stutter.
The 212 in memory can be a bad ICM or a grounded spout or a resistor issue. I would first use the warranty you got with the ICM and get a new one. You can test the ICM but since 212 is in memory that means the problem happened at an earlier time but is not currently active. So you may have a short but I would replace the ICM first.
Code 212 = Loss of IDM (Ignition Diagnostic Monitor) input to EEC or SPOUT circuit grounded.... 1. Check for the short to ground possibility in the SPOUT wire (to ECM side and to ICM side)
Update:
Took the ICM back. It tested good, but they swapped it for another one anyway. Put new one in truck. it does the exact same thing.
So, here's where we are:
1995 Ford F150 5.8l 4x4. No MAF model.
Symptom - Truck stumbles/skips/misses/etc at times. (Mainly when accelerating) Turning on headlights makes it worse.
Codes - KOEO - 111, But in continuous memory it sometimes finds code 212. Can clear codes and 212 will reappear after a few trips but never right away. KOER - 111
New stuff - black ICM, coil, sparkplugs, sparkplug wires, dist cap, dist rotor.
Freshly cleaned stuff - Batt terminals and connectors, SPOUT jumper, grounds at: the passenger fender near battery, front top near radiator, driver fender near the EEC port, front bottom near connecting frame to radiator mount, and bottom passenger side connecting frame to cabin.
I'm at a loss. Thinking about taking it to Ford. I'm going to try a new thread post in the off chance someone else has had this exact thing.
Update:
Took the ICM back. It tested good, but they swapped it for another one anyway. Put new one in truck. it does the exact same thing.
So, here's where we are:
1995 Ford F150 5.8l 4x4. No MAF model.
Symptom - Truck stumbles/skips/misses/etc at times. (Mainly when accelerating) Turning on headlights makes it worse.
Codes - KOEO - 111, But in continuous memory it sometimes finds code 212. Can clear codes and 212 will reappear after a few trips but never right away. KOER - 111
New stuff - black ICM, coil, sparkplugs, sparkplug wires, dist cap, dist rotor.
Freshly cleaned stuff - Batt terminals and connectors, SPOUT jumper, grounds at: the passenger fender near battery, front top near radiator, driver fender near the EEC port, front bottom near connecting frame to radiator mount, and bottom passenger side connecting frame to cabin.
I'm at a loss. Thinking about taking it to Ford. I'm going to try a new thread post in the off chance someone else has had this exact thing.
I will say, I wouldn't hold your breath on the dealer being able to do anything that any independent mechanic can't. Damned few of the dealerships have held onto the tooling, diagnostics, or even the people that know anything about these systems. They haven't been used in close to 30 years at this point, and they've generally got their hands full just keeping up with what gets released new, each model year.
You might get lucky, and they've still got that one old mechanic that has been there since Henry Ford was still in charge, but I wouldn't bet on it, most of those guys have retired, or gone into business for themselves.
Look behind each kick panel, at floor lever. You should have a ground on each side. If not, you will have a ground below the fuse panel that is hard to see and get to. Just because it looks clean doesn't mean it is. Miner looked good, but had corrosion and slight rust when I took the screw out and looked at the terminal.
So, I cleared codes yesterday. Drove it to work and back today. Ran the tests today.
KOEO - 111, But in continuous mem it found the 212 code again. KOER - 111
No other codes even though it's still shuddering/skipping/stalling at times.
Headlights still seem to make it worse.
Remember the truck has new black ICM, coil, plugs, plug wires, rotor, cap. Voltage across batter hold steady over 14v with accessories running and even during the skip/stall/stutter.
I just went through this on an 89 150xlt 5.0 / 302 .
For me the ICM (grey) fixed my problem (crank no start... fuel but no fire)
I went though it just like you... Starter relay, Coil, wires, distributor cap, rotor bug, ICM.
My next step was inside the upper distributor... replacing the pickup coil.
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