bouncing RPM's
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Post Fiend
Joined: Jun 2006
Posts: 9,714
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From: White Mnt's,New Hampshire
bouncing RPM's
ever since i put the moded 17 HPOP in my RPM's bounces about 50 RPM's..only does it when the truck has warmed up ...first start of the day it cranks a little longer...other then that it runs smooth and stong and theres no smoke......oil level in pump is always with in 1/2 inch from top... im thinking maybe an IRP needs cleaning....but maybe o-ring in the injectors..if it was injector o-ring..wouldnt it smoke and miss a little?? any input would be helpful...i dont want to spend alot of cash i dont have to find this...thanks guy's..
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Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
not sure..i think the CPS..come to think of it..i changed that too.just before the pump install.i took the gray out and put in a new black IH one..it made the injectors test lower on the Rotational Vel.. before that they were over 1.0
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Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
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Hotshot
Joined: Jan 2008
Posts: 13,144
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From: Rochdale MA
Good point Robin. Could something have gotten stirred up during the install and cause the ICP to have problems?
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Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
wont even start if i un hook the IPR..plug it back in and it fires right up...i been up since 2 am...had to be at work by 3 am and didnt get in till 5 pm...im going to bed..ill mess with it later this week,,,just hopeing to get some ideas...thanks guy's...
Post Fiend
Joined: Nov 2007
Posts: 9,549
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From: Payson, AZ
Post Fiend
Joined: Sep 2006
Posts: 5,584
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From: Millbrook Alabama
Did you have Jody update your tunes when you changed the HPOP?
PCM may be getting funny readings , and trying to compensate for a slightly higher than called for ICP by varying the idle.
Of course this is just a Wild azz guess, but stranger things have happened.
PCM may be getting funny readings , and trying to compensate for a slightly higher than called for ICP by varying the idle.
Of course this is just a Wild azz guess, but stranger things have happened.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
And if "stranger things have happened" we hear about them from other FTE'ers. 
