Runs rough when warm.... - Ford Powerstroke Diesel Forum
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post #1 of 47 Old 04-26-2011, 08:45 PM Thread Starter
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Runs rough when warm....

ok any ideas? my truck runs smooth when its cold but once you drive it a few miles it starts to get rough and the RPM jumps around. like its turning on and off. and i have replaced the ICP and no change. and when its warm and parked running its choppy shut her down and let her cool off and she runs good. its just when its worm it runs like crap. I was thinking a TPS but would that have anything to do with it at idle? And only when she’s warm….. and my scan gauge says P1111 (good to go) so im lost! any ideas guys

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NEW MOTOR BEING BUILT! motor thats in it right now....7.3,DI stage 4s 350/200s, GT4594 turbo, ZF5 swap, Valair Kevlar clutch, term twins HPOP, 6" lift, 35",Banks IC, DIY 6637 filter, 3.5" down pipe, BDP IDM, TW live tuned chip, BD turbo timer, DIY ladder bars,910 springs, push rods, studs, fuel and airdog I.
SOLD 99 F350 CCLB 6speed 4in down pipe. and banks junk, made 330 on the dyno at 5k feet though. 2.5in leveling kit. custom bumper.
1983 F250 6.9 IDI, 4X4, Flat bed

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post #2 of 47 Old 04-26-2011, 08:50 PM
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bad ipr o ring letting high pressure oil seep past?

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post #3 of 47 Old 04-26-2011, 08:53 PM Thread Starter
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Quote:
Originally Posted by kanuck15 View Post
bad ipr o ring letting high pressure oil seep past?
could be, i have a new set and should swap them out. its a new IPR from ford though. and it looked good when i but in the twins

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NEW MOTOR BEING BUILT! motor thats in it right now....7.3,DI stage 4s 350/200s, GT4594 turbo, ZF5 swap, Valair Kevlar clutch, term twins HPOP, 6" lift, 35",Banks IC, DIY 6637 filter, 3.5" down pipe, BDP IDM, TW live tuned chip, BD turbo timer, DIY ladder bars,910 springs, push rods, studs, fuel and airdog I.
SOLD 99 F350 CCLB 6speed 4in down pipe. and banks junk, made 330 on the dyno at 5k feet though. 2.5in leveling kit. custom bumper.
1983 F250 6.9 IDI, 4X4, Flat bed
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post #4 of 47 Old 04-26-2011, 08:54 PM
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who knows, I know warm oil works through stuff better than cold oil

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post #5 of 47 Old 04-26-2011, 08:54 PM
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yea a bad ipr would have been my first guess but im at a loss

97 f250 extended cab longbed 4x4
electric fuel, 5"pipe, 6pos chip
d60 swap 3" lift 315s
fresh e4od-blown
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post #6 of 47 Old 04-26-2011, 08:56 PM Thread Starter
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i might put them new O rings i have in and see if it fixes it

Trevor
NEW MOTOR BEING BUILT! motor thats in it right now....7.3,DI stage 4s 350/200s, GT4594 turbo, ZF5 swap, Valair Kevlar clutch, term twins HPOP, 6" lift, 35",Banks IC, DIY 6637 filter, 3.5" down pipe, BDP IDM, TW live tuned chip, BD turbo timer, DIY ladder bars,910 springs, push rods, studs, fuel and airdog I.
SOLD 99 F350 CCLB 6speed 4in down pipe. and banks junk, made 330 on the dyno at 5k feet though. 2.5in leveling kit. custom bumper.
1983 F250 6.9 IDI, 4X4, Flat bed
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post #7 of 47 Old 04-26-2011, 09:14 PM
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Put a mechanical gauge on the oil rail in either head and see what it looks like. If it's bouncy, then your dual pumps are aerating the oil, or the IPR is gettin really sticky.

And I fixed the thread title lol.
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post #8 of 47 Old 04-26-2011, 09:20 PM Thread Starter
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Quote:
Originally Posted by chvyrkr81 View Post
Put a mechanical gauge on the oil rail in either head and see what it looks like. If it's bouncy, then your dual pumps are aerating the oil, or the IPR is gettin really sticky.

And I fixed the thread title lol.
i was hoppin you would show up bud and thanks for fixin the title so you dont think its the O rings? and the IPR is brand new from ford.

Trevor
NEW MOTOR BEING BUILT! motor thats in it right now....7.3,DI stage 4s 350/200s, GT4594 turbo, ZF5 swap, Valair Kevlar clutch, term twins HPOP, 6" lift, 35",Banks IC, DIY 6637 filter, 3.5" down pipe, BDP IDM, TW live tuned chip, BD turbo timer, DIY ladder bars,910 springs, push rods, studs, fuel and airdog I.
SOLD 99 F350 CCLB 6speed 4in down pipe. and banks junk, made 330 on the dyno at 5k feet though. 2.5in leveling kit. custom bumper.
1983 F250 6.9 IDI, 4X4, Flat bed
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post #9 of 47 Old 04-26-2011, 09:37 PM
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Brand new don't mean it's good.

You'd be shocked if I shared stories of the hundreds of thousands of dollars of aircraft parts we get that're DoA.

However, that's unlikely.

I doubt the injector o-rings are bad haven't been in the truck long have they? Might try new o-rings on the IPR, and/or a spare IPR if you have one available.

Twin pumps on a single IPR, like the termies, are famous for aeration. One of the symptoms of that is a choppy/rough idle. But, the mech gauge will tell the tale there.

The ICP sensor doesn't see the difference between oil pressure and air pressure. It just see's pressure in that oil rail. Where as a mech gauge will flutter/bounce as air pockets pass under it.

Any hot start issues? What's the story on the injectors? New when installed?

How about the pumps used in the twins? New or used?
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post #10 of 47 Old 04-26-2011, 10:15 PM
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IIRC he was having horrible hot start problems until he put in the duals with the new IPR and that solved his hot start issues. Still sounds like the current problem is IPR related to me.

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