Looking for a little help.

I put fuel in my truck today(no biggie right), start it up and head to the gun range. Get to the gun range go pay my money and come back out to go, turn key and truck just turns over but, doesn't fire. So I try again to no avail. Third time I crank on it for about 10 seconds and it fires. All seems right so I go on about my business at the range.

Well I go to leave and it does it again but eventually starts. So I head home. Come on here do some searching to see what my problem could be. Go back out and try again to start and it does but is still being a pain. I notice the pump is seemng to run a lot longer then normal. So I open the drain on the filter to see if I got so water, all fuel. I then try and start it again LP runs maybe 2 or 3 seconds and stops, so I crank and it fires right up.

I figuerd I would go ahead and change the fuel filter while I was at it, well now it wont start at all

Please help.

I am sorry for the long winded post

 

Hello neighbor and welcome,

You really need to add a fuel pressure gauge so you know what the lift pump is doing. Did you do anything before fueling? Sounds like air getting in to the system. After the filter change did you bump the starter to fill the filter housing, if not do that 3-4 times and loosen injector tube #1 and #3 by the valve cover and try to start, once you get fuel at 1 and 3 tighten them back up and try to start.

Good luck.

 

did nothing unusual before fueling.

I have always just turned the key on and off 2 or 3 times to get the pump to fill the fuel bowl.

I will go and try your suggestions.

thanks.

 

well it worked, thanks.

let me ask you another question.

What is the point at which you want to replace the LP? What pressure is to low?

 

just tried to start it

it wouldn't start the first go around. shut it off waited for the LP which took a good 15+ seconds to stop. then turned the key back on, the LP ran for a 2 or 3 seconds then turned it over and it fired. Is it possible that the LP is bleeding off? Are the prone to getting a leak in the diaphram inside?

 

Check for codes.

Turn the key on/off/on/off/on and watch the odometer window.

Report anything you see in there.

P-ECU, P-PCU, and P-Done are normal, it's the P#### inbetween them that you need to make note of.


phox

 

I tried that out of curiousity, and only get P-done.

 

It could be the lift pump giving you fits, or more commonly it is old fuel hoses that people forget to change for a couple of years.

All it takes is a microscopic pin hole in one of the pressure side fuel hoses and the rig will drop its prime. If this happens you will find it gets harder and harder to start, and eventually it simply will not start and be allowing air into the fuel injection pump which absolutely does damage them.

There are two hoses on the suction side, and two hoses on the fuel return side. One on each line above the tank, and one on each line between the frame and the engine. Microscopic holes will never show up to casual observation, and you will never find a wet hose from a fuel leak associated with microscopic perforations.

 

would your opinion be to replace all the rubber lines?

 

The pump is priming faster now. Had a buddy come over with a pressure guage and I'm getting 12 psi @ idle and 10psi @ 2500 rpm's. Is this acceptable?

 

That is getting a little low. You never want your pressure to be below 10 psi and at WOT I bet you are well below. I would keep an eye on it or just fix it before to much damage it done.

 

is the fix, to just go ahead and replace the LP and rubber lines now?