[IDI Dude]

I was driving my truck the other day and then it just died. I thought at first I might have ran out of fuel but thats not the case. I changed my fuel filter and still nothing. I know I'm getting fuel up to the fuel filter because i pushed in the valve up there while cranking it over. I cracked a few a injector lines and no fuel was coming out of them while cranking it over.

 

[CDX825]

sounds like either your FSS is not getting power or has failed. The red wire on top of the injection pump should have power when the key is on. Try unplugging it and plug it back in while the key is on. You should hear a click.

 

[IDI Dude]

Well pulled the wire to see if it was getting power and it is, so i plugged it back in and still did not start. I ran a jumper wire from the battery to the pump and I did hear it click. I tried to start it with the jumper wire and still nothing. What exactly is the FSS and how could it fail?

 

[cdnsarguy]

How much fuel in the tank selected........ tank pickup breaks off at the 1/4 mark... you have fuel just no way to get it to IP.

If you have a tank over 1/4 full select it and try again....... Did you remove or fix the water separator air intrusion problem at the firewall by the booster.

FSS is the fuel shutoff solenoid... it withdraws when power is applied (click) and the metering valve is supposed to spring open allowing fuel to the IP pressure side.

You will see nothing or at best minimum fuel from the injector lines when disconnected.

 

[IDI Dude]

Well the tank pickup is fine. Also the fuel water seperator is bypassed. What else could the problem be?

 

[cdnsarguy]

OK...... if you remove the large (steel) return line from the IP.... then the fitting(s) from the top of the timing advance solenoid.... check to see if there are black particles stuck in the check ball..... If there are not re install the fitting(s) caution with the oring.. Using a hose to direct fuel flow to a white margerine dish.... have someone crank the engine over so fuel comes out the hose... You should disconnect the FSS so there is a no start.... Once you have enough fuel check it for black specks..... re connect the return line and both electrical connectors to their respective spade terminals.

Get back to us with your findings.......

 

[IDI Dude]

I was looking at the pump and I know where the ball is supposed to be but I dont see it on mine. Could this be part of the probelm.

 

[cdnsarguy]

Got a picture........ The check valve is supposed to be the first thing outside the cover just below the 90* return fitting... maybe someone did not install yours.

Check my photo link..... use 90 pics per page and hunt up the IP top pic, you will find the item there. Find the IP cut away pic too it has info and a little better item recognition. The governor cover pic shows the advance solenoid with the lifting pin for the ball, but no check valve.

 

[IDI Dude]

So your talking about the ball in the IP or the ball in the 90 degree elbow for the retutn line. I dont have the one in the return line.

 

[cdnsarguy]

There is a fitting that attaches to the governor cover with the check ball, then the 90* fitting attaches to it.

Well the tank pickup is fine. Also the fuel water seperator is bypassed. What else could the problem be?

If there is no water drain/separator in the system then rust and water may be in the IP.

Do you get any fuel out of the IP return.......when cranking over the engine by starter.

 

[IDI Dude]

There is no fuel coming from the return line while cranking. Should I try to replace the FSS?

 

[cdnsarguy]

I will send you a TSB on opening the Governor cover on the IP..... if you are mechanically inclined. You will then see the internals to a point, FSS, Advance solenoid and the metering valve..... When you remove the cover the metering valve should open. You can test the FSS too by using 12V to the spade terminal and a ground to the cover

Just PM me an email addy and request IP TSB...

 

[turbo_2006]

I worked on a truck that had a simaliar problem. We replaced injectors, injection pump, and lift pump. What it ended up being is the the line running to the lift pump had a small hole in it from rubbing.

 

[cdnsarguy]

turbo 2006 ...... was that the rubber line into the lift pump from the steel frame line. That is a good start point for air leaks and should be considered a replacement item if it has never been replaced. Remember the line should have a pigtailin it to absorb engine motion/vibrations. Dayco will have suitable fuel line in 3/8ID IIRC.

 

[turbo_2006]

This was a steel line and had rubbed a hole in it on the frame. It was on the passanger side close to the lift pump. I think that we just cut out the bad section and slipped a pieace of rubber hose over it to fix it with two hose clamps. My brother inlaw wasnt to happy when we found that after he spent all that money. How we found it was the truck wouldnt start very well after we put all that stuff on. So i pushed air in the fuel tank to get fuel up to the injection pump. Thats when we saw fuel coming out of the metal line. It was just a small small hole to. It dont take much and they wont run.

 

[IDI Dude]

I have a new lift pump, I think ill replace that and the lines before i put a new FSS in. I hope thatll fix it cuz i dont wanna spend the $75 for the FSS.

 

[IDI Dude]

I havnt replaced the lift pump yet because it seems fine cuz im getting good fuel flow to the filter and the filter is new. The IP is still not getting fuel. I have removed the top cover and still nothing. The return line did have fuel coming from it though. Do i have a bad IP?

 

[cdnsarguy]

When you had the cover off did you power up the FSS and test it to see if the plunger withdraws......... Did you check the metering valve for spring loaded open.... when the top is off the MV should be open... if you gently rotate it closed and let go it should spring open again. Just remember the FSS does NOT hook under the metering valve it just gently pushes up against it to close it

 

[forddiesel11587]

i dont know if you have tried this but ........ take off the 90* elbow check valve from the IP housing, leave it open to the air, now go ahead and crank the motor as if you were going to start up.. you may or may not have fuel at the injectors but still never the less fuel should come out from the orfice. if it does theres the problem bad check valve....... replace and prime the system and go ahead and start up...

 

[wizo]

IDI Dude keep us posted. I have the same issue with my IP. I have fuel up to the pump and have bleed all air our of the system up to the pump but still no fuel from my injector lines.