engine won't rev past 2500 rpms - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
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barkdog67
 
  engine won't rev past 2500 rpms - Posted: 06-02-2007, 07:19 PM
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Post #1

My buddy has a 02 4.7L quad cab ram he had a viper alarm system installed a few months back and a wire fried in the dash and the truck won't rev past 2500 rpms It started when the alarm fried is this some sort of anti theft or protect mode any help on fixing this would great. We reset the pcm but didn't help it.
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hemi1569
 
 Posted: 06-02-2007, 07:30 PM
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Post #2

Won't rev past 2500 in park or in any gear? Check for proper throttle cable operation and make sure it is not binding
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Names' Kevin
9/26/09 htc rally, best run 4880lbs, full street trim minus tailgate
14.31 @ 93.52
6.1 cam and pushrods
Ramhammer intake
Doug's headers(mids) with factory cats
catback

http://www.streetfire.net/video/6500...ift_740132.htm
My 6500rpm superchip shift 0 to 60mph video

Knock retard limitations by the pcm on a stock tune, it can pull:
15.0 degrees at low RPM's
5.0 degrees at 6000 RPM
9.0 degrees at 4800 RPM's.
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barkdog67
 
 Posted: 06-02-2007, 07:39 PM
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Post #3

you can still drive the truck it has a rev limiter activated that won't let it go past 2500 rpms. you can smash the gas in neutral or driving down the road it will just bouce off 2500 rpms
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hemi1569
 
 Posted: 06-02-2007, 08:02 PM
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Post #4

Try removing the battery cables for about 10 minutes... Touch them together and then reinstall.
__________________
Names' Kevin
9/26/09 htc rally, best run 4880lbs, full street trim minus tailgate
14.31 @ 93.52
6.1 cam and pushrods
Ramhammer intake
Doug's headers(mids) with factory cats
catback

http://www.streetfire.net/video/6500...ift_740132.htm
My 6500rpm superchip shift 0 to 60mph video

Knock retard limitations by the pcm on a stock tune, it can pull:
15.0 degrees at low RPM's
5.0 degrees at 6000 RPM
9.0 degrees at 4800 RPM's.
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paramount
 
 Posted: 06-02-2007, 10:09 PM
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Post #5

Sounds like the truck is in limp mode... Is it throwing any codes? Try resetting the ECU by taking off your negative battery cable for 10 min.
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+ '06 Dodge RAM 1500 4x4 \ QC \ Big Horn \ HEMI
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barkdog67
 
 Posted: 06-04-2007, 07:58 AM
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Post #6

yes it is throwing codes he hasn't had a chance to check it out yet
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