steve281086

Hi all,
I have a weird intermittent CEL on my F150 and I'm trying to figure out how to catch it?
Basically, The truck run perfectly fine until I drive for more than 1 hour. I specially noticed it on highways.
After about 1 hour the CEL lights up and lasts for maybe a minute then goes away again and will come back for a little and so on.
The symptoms are the truck starts shifting funny. When climbing a hill on the freeway it wont shift down, or when accelerating it wont shift up.
What I do to force shift it is I punch the gas to the floor until I get the shift I want.

It's been doing this since I have the truck. Last year I replaced the tranny and it still does it. This leads to me think it's not tranny but maybe something electrical.

Is there anyway I can read the ECU while driving? Or have any of you experienced this before?

Any help is greatly appreciated.
Thanks

FORD TUFF

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tvand13

A scan tool, or the paper clip method, may read codes even if the light isn't on. A flashing mil means misfire.

fltdriver

It would continually flash for a misfire-as long as it's detecting it, but yes pull your codes and go from there.

Chris_1

iTrader: (1)

Pull the codes,the computer is all set up to tell you where the problem is. Not pulling them and trying to guess is just silly.

FORD TUFF

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steve281086

Sorry all,
Had a quick appendix removal in between all this.

Alright so I pulled the codes:
The engine off test passed. I had code 212 in the continuous memory...

and then the engine on I got:
536 and 632. Something about the brake on/of circuit and the overdrive cancel switch.

I will say, in the little booklet it tells me if code 10 appears to push the accelerator the floor and release. I did that and code 10 still seem to be hanging there until code 536 showed up. Is this normal?

Any help is greatly appreciated

Thanks all and sorry again