Wire Harness Replacement
Former Vendor
Joined: Mar 2004
Posts: 4,362
Likes: 3
From: Hendersonville, NC
Originally Posted by MNFORDCHICK
After all this.....and just driving it out during lunch I am now realizing that when jsut going down the road staying at a constant speed you can hear it idle up and down, the rpm's stay put but I can hear something like the idel sound reving up and down - now what is this about???????
It will adjust depending on engine load; engine load and RPM do not always have a direct correlation. When the computer senses more load, it can up the fuel and open the vanes of the turbocharger to maintain speed without changing RPM's the slightest; this may be what you are hearing.
Senior User
Joined: Jul 2004
Posts: 411
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Originally Posted by jdadamsjr
Could it be the EBP Sensor or is that only active at idle ????
Have you tried disconnecting the EGR valve wires to see if that changes it ?
Might be worth a try....
Have you tried disconnecting the EGR valve wires to see if that changes it ?
Might be worth a try....
Best of Luck,
Corey
Postmaster
Joined: Aug 2003
Posts: 4,483
Likes: 2
From: Central Texas
I plugged in my Predator and went to Live data and watched the digital rpm jump up and down 50 RPM but didn't see any fluctuation of the tach on the dash. I guess if I was listening for it, I could hear it. It runs great the rest of the time.
MNFORDCHICK, does it run fine the rest of the time? If so, I wouldn't worry. Check your oil level. It shouldn't be up to or over the "Max" mark. Overfull oil will cause idle problems. Here is a bulletin from FORD:
MNFORDCHICK, does it run fine the rest of the time? If so, I wouldn't worry. Check your oil level. It shouldn't be up to or over the "Max" mark. Overfull oil will cause idle problems. Here is a bulletin from FORD:
Oil Level Check Tip:
When checking the oil level on the 6.0, the vehicle must be on a level surface and the dipstick must be fully seated into the tube to ensure an accuarte reading. Do not add oil if the level is above the "MIN" line on the dipstick. Broadcast Message 1512, 1574
When checking the oil level on the 6.0, the vehicle must be on a level surface and the dipstick must be fully seated into the tube to ensure an accuarte reading. Do not add oil if the level is above the "MIN" line on the dipstick. Broadcast Message 1512, 1574
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Junior User
Joined: Sep 2004
Posts: 63
Likes: 0
From: Hanover, MN
Yeah my truck seems to run fine except at occasion when I am stopped at a signal or stop sign it will idle really low and start to shake and then do a jerk and idle back up to about 750 rpm's - is that normal??? I am just so frustrated.....
I paid a lot of money and bought a new truck to not have problems....I guess I learned my lesson....
I paid a lot of money and bought a new truck to not have problems....I guess I learned my lesson....
Former Vendor
Joined: Mar 2004
Posts: 4,362
Likes: 3
From: Hendersonville, NC
Originally Posted by MNFORDCHICK
Yeah my truck seems to run fine except at occasion when I am stopped at a signal or stop sign it will idle really low and start to shake and then do a jerk and idle back up to about 750 rpm's - is that normal??? I am just so frustrated..... I paid a lot of money and bought a new truck to not have problems....I guess I learned my lesson....
I paid a lot of money and bought a new truck to not have problems....I guess I learned my lesson....
Senior User
Joined: Jul 2004
Posts: 411
Likes: 0
Originally Posted by MNFORDCHICK
Yeah my truck seems to run fine except at occasion when I am stopped at a signal or stop sign it will idle really low and start to shake and then do a jerk and idle back up to about 750 rpm's - is that normal??? I am just so frustrated..... I paid a lot of money and bought a new truck to not have problems....I guess I learned my lesson....
I paid a lot of money and bought a new truck to not have problems....I guess I learned my lesson....Best of Luck,
Corey
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