A little confused about two codes.

[Hoosierman]

So I've been recently trying to diagnose what could ultimately be a misfire (didn't think so at the time), and so I used a Ford scanner to retrieve codes and what I got were 18c and 67o.

One of them has to do with each and the other is the neutral safety switch I think. On the NSS, the truck was in neutral (5-speed, no parking brake!) and I read that if the clutch wasn't depressed during the KOEO test, it could throw the code. True?

On the other code, it's worth mentioning that I've tried three different TFIs, one a brand new Motorcraft. It could be a fault in the wiring and it could also be the PIP. Does anyone have further information on that?

Ill be testing for a misfire next weekend, I figured I'd like to gather some information on those codes from knowledgeable gear heads on this forum in the meantime.

Thanks!

 

[franklin2]

On code 18, you do have the SPOUT jumper inserted correct? And those jumpers have been known to go bad.

You are correct about the code 67. You can try again and when prompted, push the clutch pedal in.

 

[Hoosierman]

On code 18, you do have the SPOUT jumper inserted correct? And those jumpers have been known to go bad.

You are correct about the code 67. You can try again and when prompted, push the clutch pedal in.

I removed the Spout, cleaned the contact points and reinserted. Could I just jump it with some wire to see if it improves anything? For context: I'm not fully versed on what those do, but I recall them being used for timing adjustment.

 

[rusty ol ranger]

I wouldnt worry a whole lot about 18 as a continuious memory (c) code. If you research it NUMEROUS EECIV fords end up with this code and no one really has ever figured out why. I know my ranger had it and ran fine. My B2 did to untill i changed the ECM...


67 ive only gotten when doing a KOEO test with the truck in first gear. Never heard it being caused by not hitting the clutch.

These things while computer controlled are still pretty old school. A missfire is more likely to be a rotor, cap, plug wire, plug or possibly injector.