Lope-like issue - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 11 (permalink) Old 07-10-2014, 12:18 AM Thread Starter
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Lope-like issue

On my way to work this morning the truck lost most of it's power and struggled to even get up a small grade. Got to work and parked it. Started it back up before i left work and it ran almost like it was an old car idling with a big cam just "loping". checked ICP sesnsor and it was covered in oil as was the pigtail. Bought a new ICP sensor but the pigtail won't be here til tomorrow. sprayed out the pigtail with some brake cleaner and put a little dielectric grease on the new sensor. fired it up and still same thing. hooked up my OBD2 adapter and checked on torque. my PSI on hpop was 650ish at idle in park (600-700 rpm) and 2900 psi at 2500+ rpm in park. I drove my work truck home (got fixed today) so my personal truck is still sitting at the shop. didn't take it back out on the road. I plan to swap out the pigtail on the ICP sensor tomorrow evening. however what else should i look at or symptoms should i look for?
1999.5 F350, 4x4, auto trans, 160k miles, only mods are glowplug relay(western plow), 6637 and well that's about it. tranny rebuilt at 114k with a shift kit (before i owned the truck) Any help would be GREATLY appreciated!

99 F350 (99.5 motor E99 suspension)
Rebuilt tranny (with shift kit) @ 114,000
6637, Foil Delete, IC tubes Boots and clamps cleaned
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post #2 of 11 (permalink) Old 07-10-2014, 04:39 PM
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Re: Lope-like issue

did the truck ever throw a CEL/SES light?

no tuner/programmer/'box'/chip etc on the PCM?
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post #3 of 11 (permalink) Old 07-11-2014, 12:11 AM Thread Starter
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Re: Lope-like issue

SEL is on only when its it running. Doesn't store a code that I can pull with torque. No tuner

99 F350 (99.5 motor E99 suspension)
Rebuilt tranny (with shift kit) @ 114,000
6637, Foil Delete, IC tubes Boots and clamps cleaned
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post #4 of 11 (permalink) Old 07-11-2014, 12:18 AM Thread Starter
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Re: Lope-like issue

New pigtail installed. No change. Could the CPS do that?

99 F350 (99.5 motor E99 suspension)
Rebuilt tranny (with shift kit) @ 114,000
6637, Foil Delete, IC tubes Boots and clamps cleaned
kenmore is offline  
post #5 of 11 (permalink) Old 07-11-2014, 01:55 AM
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Re: Lope-like issue

check you valve cover gaskets mine did the same thing ran like #### cel was on no codes
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post #6 of 11 (permalink) Old 07-11-2014, 02:04 AM Thread Starter
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Re: Lope-like issue

i will have to check that out then...good call

99 F350 (99.5 motor E99 suspension)
Rebuilt tranny (with shift kit) @ 114,000
6637, Foil Delete, IC tubes Boots and clamps cleaned
kenmore is offline  
post #7 of 11 (permalink) Old 07-11-2014, 02:17 PM
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Re: Lope-like issue

Quote:
Originally Posted by kenmore View Post
SEL is on only when its it running. Doesn't store a code that I can pull with torque. No tuner
constant SES/CEL can only be caused by:

A) lack of electrical continuity to 'an' injector (inj solenoid, inj wiring, IDM issue)< ie, something electrical

B) bad ICP sensor

if the truck doesn't have a dead misfire on one/more cyls...then it's most likely an ICP sensor/harness issue.

highly recommend using OEM Ford/Motorcraft sensors
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post #8 of 11 (permalink) Old 07-11-2014, 06:50 PM
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Re: Lope-like issue

Quote:
Originally Posted by golfer View Post
constant SES/CEL can only be caused by:

A) lack of electrical continuity to 'an' injector (inj solenoid, inj wiring, IDM issue)< ie, something electrical

B) bad ICP sensor

if the truck doesn't have a dead misfire on one/more cyls...then it's most likely an ICP sensor/harness issue.

highly recommend using OEM Ford/Motorcraft sensors


Also, you have a constant SES light but no codes? That seems odd. As long as you have a scan tool that will pull Ford enhanced codes, you should be able to pull something from that light. Unless something fishy is going on with your PCM.
post #9 of 11 (permalink) Old 07-13-2014, 12:33 AM Thread Starter
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Re: Lope-like issue

constant SES but when it gets turned off no codes and no SES

99 F350 (99.5 motor E99 suspension)
Rebuilt tranny (with shift kit) @ 114,000
6637, Foil Delete, IC tubes Boots and clamps cleaned
kenmore is offline  
post #10 of 11 (permalink) Old 07-13-2014, 02:29 PM
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Re: Lope-like issue

I had some funky idle with a ses ..was the uvch.
then had similar situation again, but that was fuel pump failing.
cant remember if that had a light or not.

Early 99 f350 4x4 crew cab, auto. pmt2 pcm
2001 cup holder ,T500, MAX AC ASSIST AC mod, Diy Twin tymar, TS chip, Powerslots & Hawk pads, ford AIC, ..... with big fat want to list.
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