Question Runs when first cranked HELP

[Ken Harris]

When I first crank the truck...it runs rough & then it smooths out. I have a 1997 F250 7.3 L Diesel. I have done everything I know to correct this but nothing has worked. Please let me know if anyone has had this problem & know what I can do to fix it...

Thanks

 

[BIG JOE]

When I first crank the truck...it runs rough & then it smooths out. I have a 1997 F250 7.3 L Diesel. I have done everything I know to correct this but nothing has worked. Please let me know if anyone has had this problem & know what I can do to fix it...

Thanks

What have you done, or checked so far ??

 

[WD40]

Welcome to SSD.com Ken, glad to have you here. We have some good 7.3 guys
on here and someone should be able to help you.
Doug

 

[DaveBen]

Ken.

Dave

 

[Ken Harris]

Truck runs rough

What have you done, or checked so far ??

I have put a Cam Shaft Sensor, Fuel Pump, A high Pressure oil pump sensor, fuel sensor on top of engine but none of these have helped. It runs rough when it's hot or cold until I hold down the throttle it quits & then it runs smooth. No check engine lights come on.

thanks
Ken

 

[BIG JOE]

I have put a Cam Shaft Sensor, Fuel Pump, A high Pressure oil pump sensor, fuel sensor on top of engine but none of these have helped. It runs rough when it's hot or cold until I hold down the throttle it quits & then it runs smooth. No check engine lights come on.

thanks
Ken

Fuel & Air filter good shape ?

Battery posts & clamps clean ?

What weight of oil ?

 

[Ken Harris]

Truck runs rough

Yes, all of these items are ok...

Thanks

 

[BIG JOE]

Yes, all of these items are ok...

Thanks

Plug in the bolck Heater for at least 2 hours prior to first starts. See if that helps ?*

(if not, check the GPR & GP Voltage & ohms)

*(my question about Oil wieght might have sounded Dumb to you.. but IF your oil is Thick & Cold.. due to the wieght, some of your Injectors can be slow about injecting fuel.. until the oil heats up) (viscocity issues) (rough run'n) (even in Florida)

 

[iracemine]

yeah Id say something with the gpr or a bunch of bad plugs

 

[Ken Harris]

What kind of plugs are referring to...

Ken