Cruise Control Disengages - Ford Powerstroke Diesel Forum
 
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post #1 of 9 Old 06-11-2012, 11:22 AM Thread Starter
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Cruise Control Disengages

I have a problem on one particular road where cruise control disengages without me touching the brake pedal.

Its admittedly a sealed but bumpy winding section of road.

On the new freeway which is smooth as - I can go for maybe an hour before it will occasionally just disengage cruise control by itself - whereas on the bumpy road it happens every few kms.

Could it be that the break pedal moves a little by itself with the bumps and the disconnect sensor is too finely set?

Is it an easy fix?

Maybe there's something else? Does it work by maybe a dirty sensor on the tail shaft that counts RPM'S to maintain the speed or something?

Hoping this is something simple...(and cheap) that I can rectify myself.

Thanks in advance!
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post #2 of 9 Old 06-15-2012, 02:05 PM
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Same problem with Cruise Control disengaging !!!

It began with the cruise disengaging every so often, then I noticed that when I would hit a bump in the road, it would disengage. Now, I can't get it to engage. Looking forward to your thoughts. So for, I have been able to fix or replace any problem that I came across by looking it up on the forum
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post #3 of 9 Old 07-01-2012, 05:34 PM
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figure out a way to monitor your brake lights. if they are on when your trying to engage cruise control its probably a bad brake pedal switch.


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post #4 of 9 Old 07-12-2012, 07:50 PM
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Idk if its anything like my other ford, but IIRC almost all cruise controls are held by vacuum..

you could possibly have a leak in a line somewhere that would open up just enough with a bump or something and over time, grew causing your no cruise issue.

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post #5 of 9 Old 07-12-2012, 10:29 PM
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its probably your brake pedal switch needs adjusting
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post #6 of 9 Old 07-13-2012, 12:28 AM
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Take ur psd to ford theres a recal for that exact problem... Ill try to get the recall number... But they can look it up by your vin... Y worry let them fix it... fyi im pretty sure diesels dont use vacum... Lol



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post #7 of 9 Old 07-13-2012, 04:25 AM
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Quote:
Originally Posted by GunnyRappUSMC View Post
Take ur psd to ford theres a recal for that exact problem... Ill try to get the recall number... But they can look it up by your vin... Y worry let them fix it... fyi im pretty sure diesels dont use vacum... Lol



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I forgot about the harness recall.. and I couldn't remember if they did or not. I had a similar problem on my f150 and turned out to be a vacuum leak.

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post #8 of 9 Old 07-13-2012, 03:56 PM
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Ahh yes but as i said diesels dont have a vacum system i dont think....

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post #9 of 9 Old 07-16-2012, 03:31 AM
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some diesels have a vacuum pump but thats just for the blend doors in the a/c n heat


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EGT, Boost and FP Gauges
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