surging problem?

[Dafiveo]

Ok i recently changed my oil, oil filter, air filter, and fuel filter. Now after the truck sits for a long period if time (normally overnight) when i start it up, the truck has a real bad surging idle until i either tap the gas or put it in gear. Also if you just let it continue doing it, it will eventually level out. What is the problem here? Im new to the whole diesel scene so i decided to ask someone that actually knows something about them... Thanks for the help!

[NCHornet]

Could just be the cold weather affecting it. Have you checked the GP system to make sure it is all working fine? Plug it in and see if the problem goes away.

[rufushusky]

I would plug it in and check the fuel filter and make sure the cap is on tight and there are no leak or anything. I know after I change the fuel filter on my dodge it idles like crap until it can fill the filter container.

[jejjackson]

Sound like the exhaust backpressure valve to me. It is normal. If it has a kind of hissing sound during the surges then that is most likely the EBPV. It is there to help the engine heat up faster.

[Dafiveo]

See its not cold around here yet. Doesnt matter bout the temp. It does it hot or cold. I know the sound of the exhaust valve. Its definately not that. The exhaust valve wont kick in till it stops. It sounds kinda like when you start up a big blower car. Top alcohol funny car or top alcohol dragster. Just kinda roar roar roar roar. Almost like you are tapping the gas quickly. It makes the truck rock back and forth. As soon as you touch the gas or put it in gear it stops. I was wondering if it could be the o ring on the fuel filter cap not being seated properly? Like leaking down over night and getting air in it. Maybe this helps yall...

[Mikesf250]

Do you use Lucas oil stabilizer or some other thick additive if you do try changing oil with proper spec. Mine was doing that and it was the thicker oil messing up the IPR when you first start it causing the Idle to gun or surge. I ended up having to put new IPR

[Dafiveo]

Originally Posted by Mikesf250

Do you use Lucas oil stabilizer or some other thick additive if you do try changing oil with proper spec. Mine was doing that and it was the thicker oil messing up the IPR when you first start it causing the Idle to gun or surge. I ended up having to put new IPR

Yeah i run lucas. What is the ipr?