pfeinauer

Hey all,

I have a 1994 E350 Ford Club Wagon with a 460 in it. I hope you don't mind, but I want to give all the details of my issue, so it may make the post a bit long.

It had been sitting for about 2 years, and after 1 year they drained the gas, tried to start it, but no go. Then a year later, I took over, added gas to the tank (the tank probably had just a gallon or two of bad gas) and it was misfiring quite a bit. Now, I'm experiencing a misfire at random times while the car is idling (it never completely stalls, it always stays running), and also while driving.

I've also had a tune up done, and the technician was specifically looking for the cutting out and the misfire. This is what he changed:

New Plugs (OEM FORD)
New Spark Plug Wires (OEM FORD)
New Distributor Cap
New Rotor
Replaced CTS sensor (What is this?)
Changed Ignition coil (same problem)
Cleaned Fuel Injectors
Cleaned Throttle Body

It also does this when I'm low on gas. When going up a hill, the engine will basically cut out several times until I'm on level ground, However, even with a full tank, it will cut out and misfire during idle, and once about every 5-10 minutes.

The issue was a lot more severe until I replaced the TFI module, which then it fixed most of it, but it still happens about once every 5-10 minutes, and a lot more during idling.

I can drive it around, and it's not that bad, but I would like to have it perfectly working. Any ideas from any gurus?

-Pat

R.S.LOGAN

Could try changing fuel filter .

pfeinauer

I'll try out the fuel filter, but I believe I just had that changed with my latest oil change about 3 months ago (I've had the problem for almost 3 years now).

I also wanted to add a couple things. I've made a video where you can hear the problem, to see if that helps anyone.

(" 1994 Ford Club Wagon misfiring issues - YouTube") at 13-16 seconds you can hear it misfiring and almost stalling, and again at 24-26 seconds.

I also have an Actron code scanner, and I am getting a perfect run through the KOEO test, but in the Continuous Memory Test, I get code 212 which is: Lost of Ignition Diagnostic Monitor signal - short to ground in Spark Output circuit (SPOUT).


-Pat

Figaredo

I have the same issue. All filters new, oil, plugs, cables, rotor, distributor cap. What could it be?

Bert

What code are you getting? Fuel Injection Technical Library » How To Run a Self-Test

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Bert

Figaredo

For me, there are no codes at all. Not with the self test, nor with the scanner.

Figaredo

Searching on the net I found a post with the solution: Open the PCM and search for the three capacitors. Only one will be rated 10uf (Ten microfarads). It will be certainly blown. Change it. Problem solved. My truck now has very few/no misfire after a 300 miles trip.

I'll let you know if the problem returns.

Cheers!

Bert

That's great info, thanks for the update.

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Bert