Rough Idle

[jfc]

Hi all,

I am having a very rough idle, but runs decent (a little rough) when reved up

Fuel filters been changed and now lift pump changed.

The only thing I couldn't do is prime it, as I can't seem to figure out how to turn the crank 90 degrees, (What the best way?) I tried priming while it was running but it didn't help.

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92, 250, ext cab, 4x4, 5 speed

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Last edited by jfc : 11-06-2009 at 12:01 PM.

[jfc]

And driving it to town (20 min highway) didn't help

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92, 250, ext cab, 4x4, 5 speed

[Greenleaf]

This happen all at once?

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1990 D250/1992 D250 Modified by **Smokehouse Diesel** Ashland, OH

....therefore, my brothers, I want you to know that through Jesus the forgiveness of sins is proclaimed to you. Acts 13:38

[jfc]

Originally Posted by Greenleaf

This happen all at once?

The rough Idle yes.

I ran a leaky fuel filter for (as in my fuel filter thread) a while, then couple days ago it started fine, then ran a bit rough on the way to town, and then roughy idle at the lights in town, fixed the fuel leak on the filter, still ran rough, changed the lift pump, still runs rough.

I didnt get a change to bleed it properly though as the lever on the lif pump aint doing anything, and I havent figured out how the rotate the crank

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92, 250, ext cab, 4x4, 5 speed

[SheffDodgeD250]

Im having a similar problem. I took a video of it to see if anyone could help?


http://tinypic.com/r/208brc8/4]View My Video

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91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

[powerbrake]

you can bleed the injectors one at a time while the truck is running. wear old clothes and eye protection as it can get messy.

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92 4x4, fuel screw turned in all the way, starwheel dropped to the bottom, 40 hp injectors, machined pin, detroit locker lets me smoke 'em evenly. auto meter pyro.
God Bless Our Country and Damn The Goverment

[jfc]

Originally Posted by SheffDodgeD250

Im having a similar problem. I took a video of it to see if anyone could help?


http://tinypic.com/r/208brc8/4]View My Video

Yup thats about what mines doing, runs just about fine when reved up, but rough as fawk at idle, never actualy stalls though.

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92, 250, ext cab, 4x4, 5 speed

[jfc]

Originally Posted by powerbrake

you can bleed the injectors one at a time while the truck is running. wear old clothes and eye protection as it can get messy.

I did this ... but how long should you keed the injector open?, how much spray dou you want coming out?, and will this also bleed the low pressure side of the fuel system?

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92, 250, ext cab, 4x4, 5 speed

[powerbrake]

it will bleed all of the system but it would mak a big mess.. seeing as you have both been running your trucks all the air should have been forced to the injectors. i am not aware as to where else the air ( if that is what it is ) could be hiding. i will be watching this as i've seen this problem before and bleeding at the injectors fixed it.. this might be something else and i want to learn how to fix it too. send philip or greenleaf a pm. please post what you learn.

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92 4x4, fuel screw turned in all the way, starwheel dropped to the bottom, 40 hp injectors, machined pin, detroit locker lets me smoke 'em evenly. auto meter pyro.
God Bless Our Country and Damn The Goverment

[SheffDodgeD250]

Will do. Like jfc ive tried that. and everything hes done. I wonder if it is something to do with the ve pump???

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91' D250 w/ Lil Red Express Bed stacks, Soon to be tweaked FP and Custom fuel system.

[jfc]

I guess it could be, but I am hoping not

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92, 250, ext cab, 4x4, 5 speed

[Left out in the cold]

Is your LP sucking in air some where?

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91.5 I/C W250 5sp 3.07s turned up pump 16cm2 M&H M2 BHAF Bosch +40s
92 W250 Xcab auto 3.54 bonehead stock