I just grind the cam plate and turned the pump up and now i have to pump the throttle to start it but after its warm it starts. I think it could be the lift pump because it runs about 12 -15 on idle but when running it dosent change much and when i get in to it goes max to 20-25 and goes down it dosent hold i checked the heater grid its fine i replace ofv it helped with smoking but i dont want to replace if i dont have to but if so i was thinking about putting a 6.0 duramax fuel pump on it because the hold up 55psi so i would kinda be like a air dog just not as $$$.

 

wats idle rpm.

 

it idles at 500-600 rpms that's never changed

 

i think the idle is a little on the low side. 750 to 800 seems a little better. just my 2 cents

 

but do u think it would matter on the start up?

 

yep do u know how to adjust it

 

no i dont, let me ask u i put a fuel psi gauge on it and my max fuel was 25psi do u think after the truck sits the pressure bleeds off and a few hour start up it has to repressure's the system and thats what could cause the ruff start?

 

truck should idle at 750 rpms with the truck in drive and the a/c on, after i did my fuel plate i had the same ordeal, i gotta give it a little throttle to start, no big deal and everything is normal plus it blows a little smoke when it starts

 

no like i have to hold it full throttle for it to start and its like i have to repressurize the system. i have the fuel plate slide half way now and the pump turn back down. i just ordeted a fass fuel pump to get rid of the lift pump.

 

fass pumps are a waste of money on 12v's. 12v's dont need crazy hi fuel pressure like 24v's do. Yes, readjust your idle. That will help. I'll bet money you dont need to have the go-pedal floored (remember; this is a mechanical truck.. it's doing the same thing w/ your foot partially on it as it is floored). I ALWAYS had to hold my foot just barely touching the go-pedal for it to start when it was below say... 50*.