Well im not sure whats going on... everytime i start my truck it cranks over forever before it starts, almost like im haveing to bleed air outa my lines. Even if i have it running and turn it off and then start it immediatly after i shut it off.... its still takes to long to start and doesnt have any start up smoke either. Infact when it does start it sounds like its just barely getting enough fuel and then idles fine. I idle at 800rpms and fuel psi is at 40 during idle. Any ideas as to why my truck doesnt like to start? i feel like im gonna burn my starter out if i keep this up

jason

 

nobody has any ideas? its got me super confused and i think my starter is getting burned out or something cause thats even starting to not wanna always crank over........ the truck drives fine and has plenty of fuel at WOT, but starting always takes to long and feels like its not getting any fuel when it does start it kinda stumbles to and idle and then its fine. I have new fuel lines from the tank to the pump and back, larger than stock too. New lift pump from PDR and i didnt have this problem till i put my laser cut DVs in, but i didnt think they would cause this... could they?


Jason

 

Is this your 1st GEN engine or the 95 P pump? If its the P pump. Your losing your prime. Check for air leaks in the line's as well as a lift pump issue...Thats why it starts back up after you have ran it....HTH

 

Does sound like an air in fuel problem. I agree with Rifle, check all of it, put a wrench on the lines just in case when you installed the DVs you left one a hair loose.

 

Hey thanks, this is a 95 p-pump motor, just a first gen body the thing is... the truck doesnt start up right after i have run it...... which lead me away from the thought of losing prime, because i would have assumed that i would still have a little fuel pressure right after i turn the truck off, but it still takes the same amount of cranking time to start. im not leaking fuel anywhere, but ill double check all fittings, how can i check to see if my lift pump is bad? and would that cause the drain back? Oh and my starter is starting to just click when i go to start it, but then sometimes it will turn over and then stop.... then turn over and stop.... then click and click and then finally crank over till the truck starts...... any ideas on that? thanks guys

jason

 

You will not lose fuel when it sucks air. Hence the hard starting problem. Your losing prime. Do yourself a favor. Hit the priming botton afew times after it sits. If she starts right up, its on the suction side of the fuel system. If your LP is in good shape, then you should not be having the problem. When you go and "prime" it next time, see how long it takes to prime up. If it takes a long time to prime with the piston LP, time to replace it. As far as your starter. Throw a rebuild kit in it. WHEW!!!!! Hope that helps man...

 

Thanks alot man, ive been so stumped and frustrated over it i was going nuts. Especially since my LP is brand newish... ive had i for over a year, but only had it in use for a few months, ill prime it and see if that helps thanks again.


Jason

 

Okay.... so the lp aint the issue... i went to prime the truck before i started it and it had plenty of pressure i could barely push the prime button, so now what? is my inj pump bad? i got plenty of fuel in the filter. Also i noticed my fuel pressure gauge do this twice now... i started my truck and fuel pressure went all the way up to 80psi!!!! so i hit the throttle and started driving and it hovered between 40-50psi, when i go to stop and let off the throttle it climbs back to 80psi then to 60 then 70 and then down to 50psi when i stop. Why would my fuel pressure be jumping like that? it normally idles at 40psi and cruising i have 36-38psi, at WOT i never go under 25psi. But the fuel pressure spiking like that cant be good? BTW my fuel psi has only done this twice... usually psi is fine.


Jason

 

any ideas? could my inj pump be bad? or on its way out? i really need to figure this out before i burn out my starter........... is their anything else i should check? thanks

jason

 

Ever change you overflow valve?

 

Nope, but ive played with the spring in it to get my fuel pressure to read 40psi, but other than that i have never had a reason to replace it. I never hear of them going bad?



Jason

 

Could it be your shutdown solenoid sticking? Sounds like your starter contacts are fried and don't they supply power to the shutdown solenoid during cranking?

Also have you tried giving it throttle while cranking?

 

hmmm could it? my LP still has pressure against it when i try to prime it, and my fuel solenoid is wired to a momentary switch. So my fuel solenoid and starter are wired totally seperate. And i have noticed that my truck gets harder to start the more i drive around town and turning it on and off going from place to place. it takes longer to start and cranks forever..... even throttling it while cranking doesnt help Im still so confused?

jason

 

Doesn't the solenoid on the p-pumps have 2 sets of windings? 1 low amperage to hold it open, and 1 set of high amperage to pull it? Maybe your wiring on the pull side is too small and it doesn't pull all the way into start position?

 

Yes you are correct, and when wiring this i new i had to wire it differently, there are two power wires for the solenoid, one for a constant low amp 12v, and one for a large amp momentary 12v. So the low amp one is wired to my constant low amp 12v keyed on wire and the other is wired to a momentary switch that allows all the amps needed to open the solenoid, this aint the problem though..... i have been running this setup for years now. Because when cranking the motor over i dont hold the solenoid open with my momentary switch, i open the solenoid and then crank the motor. The issue is something else........... plus when cranking the motor my fuel pressure bounces between 10-40 psi until it starts... so i know i got fuel pumping through the filter.......... my itching suspicion is my inj pump is going out...????


jason