Mild rough start and slight lope at idle - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 10-01-2013, 08:55 AM Thread Starter
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Mild rough start and slight lope at idle

Ever since i got my OBS its had a slight rough start and somewhat has a small lope at idle at all temps cold or warm engine no matter what. Well i did an e-fuel conversion and i thought that would have solved it but it didnt.

So next i replaced the GPR and still has a lope. Next would be testing GPs but considering it does it at any temp and whether or not if the motor is hot or cold im gonna almost say without a doubt its not but as soon as i get ahold of a multimeter ill test for sure

So next im thinking its my oil system but after talking with Kris he thinks my numbers are good

Heres my HPOP numbers at WOT(look at max value not current)


Heres my IPR duty cycle at interstate merging speed(again look at min and max values)


My HPOP is stock and truck is not tuned just a 6637. I have no problem at all with power its just at idle it has a slight lope, just enough to shake the truck more than it should. Also now that its a bit chillier in the mornings it seems like its a bit harder starting and it puffs a little white which could just be condensation but not sure.

I understand its an older truck but still dont think its quite right.

Local Jackass member Pat

Battle cry of every 6.0 owner out there
Quote:
Originally Posted by access_max View Post
With the issues fixed a 6.0 can run circles around a 7.3.
2000 F-350 7.3L ZF6
Standard 7.3 mods
SCT tuned
8" Fabtech lift 13" total
5:13 Gears
46" Goodyear MVTs Military takeoffs
Bushwacker Cut-Out Fender Flares
Ranch Hand front and rear bumper
On-board air W/Semi horns

1995 F-350 7.3L E4OD DRW
Standard 7.3 mods
PHP Hydra W/Tony Wildman tunes
160/0 Injectors
T-500 HPOP
E-fuel Conversion
West Coast mirrors
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post #2 of 4 Old 10-03-2013, 06:15 PM Thread Starter
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Bump guys any ideas?

Local Jackass member Pat

Battle cry of every 6.0 owner out there
Quote:
Originally Posted by access_max View Post
With the issues fixed a 6.0 can run circles around a 7.3.
2000 F-350 7.3L ZF6
Standard 7.3 mods
SCT tuned
8" Fabtech lift 13" total
5:13 Gears
46" Goodyear MVTs Military takeoffs
Bushwacker Cut-Out Fender Flares
Ranch Hand front and rear bumper
On-board air W/Semi horns

1995 F-350 7.3L E4OD DRW
Standard 7.3 mods
PHP Hydra W/Tony Wildman tunes
160/0 Injectors
T-500 HPOP
E-fuel Conversion
West Coast mirrors
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post #3 of 4 Old 10-03-2013, 06:39 PM
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my truck feels the same when i run the crappy ford recall cps.
try getting a new cps and that might fix your rough idle.

one other thing that caused worse idle for me was a worn out fpr.

the brass poppet and orings in the fuel pressure relief were extremely worn out.

oh and lastly clean the ipr screen. that might help! the obs have a screen on the ipr that is often clogged.

99.5 f250 7.3 4x4 255k
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Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, RR AIH Delete, 6637, 4" Diamond Eye, BD Billet Wheel, TruCool Max
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post #4 of 4 Old 10-03-2013, 06:43 PM Thread Starter
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Quote:
Originally Posted by blue99stroker View Post
my truck feels the same when i run the crappy ford recall cps.
try getting a new cps and that might fix your rough idle.

one other thing that caused worse idle for me was a worn out fpr.

the brass poppet and orings in the fuel pressure relief were extremely worn out.

oh and lastly clean the ipr screen. that might help! the obs have a screen on the ipr that is often clogged.
I just got the upgraded dark blue one and i dont think it did anything.

I did and e-fuel conversion so no more stock fpr

Ipr is kinda the last thing i can honestly think it is how hard is it to get out ive never messed with it

Local Jackass member Pat

Battle cry of every 6.0 owner out there
Quote:
Originally Posted by access_max View Post
With the issues fixed a 6.0 can run circles around a 7.3.
2000 F-350 7.3L ZF6
Standard 7.3 mods
SCT tuned
8" Fabtech lift 13" total
5:13 Gears
46" Goodyear MVTs Military takeoffs
Bushwacker Cut-Out Fender Flares
Ranch Hand front and rear bumper
On-board air W/Semi horns

1995 F-350 7.3L E4OD DRW
Standard 7.3 mods
PHP Hydra W/Tony Wildman tunes
160/0 Injectors
T-500 HPOP
E-fuel Conversion
West Coast mirrors
Rammstein1224 is offline  
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