rought idle

[pullinpower350]

im out of ideas. on my 1995 ford f-350, i replaced my fuel pump, glowplugs, and glowplug relay. on cold mornings when i start it, it will lung and idle rought until i give it fuel. i have a remote car starter i want to put on it but dont want to cause any damage. any help?

[95PDXLT]

How cold are we talking? These powerstrokes idle a lil too low anyway, so once its below freezing with thick oil its not the best. The regulator shim seems to work wonders for people.

There is a fast idle for when its real cold. Its only came on once on mine when it was 15 below and not plugged in. It stayed on for like maybe 20 seconds. -25 C and plugged in my fast idle still does not come on.

[pullinpower350]

only around 30 degrees. where do i get these shims.

[95PDXLT]

check out post #3 in this thread for tips on the regulator shim.

What mods can I do???

Might want to clean the screen and inspect your fuel pressure regulator while your there.

How rough is your idle? my trucks got 195K no shim on the regulator and it idles a hair under the 500 rpm mark hot on the tach. When it first starts it idles a high higher when cold. It ran a little better when i went from the stock airbox to a home made tymar intake.

[pullinpower350]

it will bounce from 200 to 600 rpm until i give it some fuel. where the fuel pressure regulator screen? also when its warm it only idle at 500 and never goes up above that even when it is cold.

[95PDXLT]

regulator is bolted to the fuel bowl. Be on the right side standing infront of the rad.

has it always done this or is it a new problem? is the engine oil dirty?


I'd start with cleaning the screen between the regulator and fuel bowl first, if it does not help try shimming the FPR. If the problem still persists might want to check to see what the fuel pressure is at idle cold when it runs bad.

[pullinpower350]

thanks ill try this

[z250kid]

get the oil cross over kit
i just orderd one like 10 min ago
let you guys know the results after i install it