New issue just popped up today. My truck is an '03 F250, 7.3, auto, 4x4. As I was driving this morning I felt the engine/transmission stumble as it was shifting gears. It was raining and at first I thought it might just be the tired skipping on the wet streets. Then after a while it did it again as it was shifting gears from a stop.

As I was about to get home the CEL came on and stayed on till I got it parked and shut it down. When I restarted it the CEL was off.

It appears to idle fine. Any thoughts???

I plan to get it to a mechanic to see what codes there are in the morning, but what could possibly make it stumble as it is shifting gears and would throw a CEL?

BTW.....I just replaced the ICP from the dealership, and I also recently had the transmission flushed.

Would the transmission shift solenoid throw the CEL? Just thinking out loud. Of course it could be engine related as well.....

 

Update......just got back from a 30 minute drive and not one issue. It shifted fine.....no stumble or misses.

 

Yes, a shift solenoid can turn on the CEL. So can about 100 other things. There is a code stored, you need that code to find out what's wrong.

 

Thanks for the reply. I intend to get the codes read in the morning. I just didn't know if there was anything I could visually check in the meantime. Weird that the next drive I took with the truck it ran fine with no issues.

 

when you where having issue where you using the windshield wipers and then on the next drive no windshield wipers?

 

Wiper used on both drives.

 

You can visually check everything on the truck. Without the codes it's a waste of time.

 

I agree. I'll report back when I get the code(s). I though something simple, like when my ICP went bad. I had no clue that a tell tell sign was oil in the connector. However, I needed to verify by getting the codes as well.

 

What CPS do you have?

 

Funny you should ask that, as I've been wondering if this was my problem all day. I changed the CPS a short time ago when the issue was actually my ICP. I changed my original CPS with a Duralast CPS from Autozone. but it wasn't the problem, however it was a cheap try. I kept the OEM CPS as a backup. I wonder if this is my problem? I guess I'll know more when I see my code(s).

 

I am leaning that way. Those cheap aftermarket CPS' are known to be susceptible to interference from the wiper motor. Change it back to your original and see what happens.

 

I never heard of this before.....but that doesn't mean anything either. Thanks for the tip.

 

You are welcome. Here is a link to a good thread talking about it

https://www.ford-trucks.com/forums/9...werstroke.html

 

.......

 

I couldn't get it scanned today.....mechanic was sick. So I decided to put the original CPS back in and use the newer one as a spare. Don't know if this will fix my issue, but it's not raining today. Runs and drive normal today though.