No Start

[tx_fireman1525]

Im getting fuel to the injectors, but still no start. any ideas?

 

[peobryant]

Shut off solenoid? I think it needs 12V.

 

[icman95]

Air in fuel lines? You wouldn't necessarily notice it affecting the fuel to the injectors, but if it's there, it would make no or hard starts. Have you tried a shot of starting fluid? Maybe bleeding the fuel system?

 

[tx_fireman1525]

I pulled the wire off of the shut off solenoid and it clicked. Put it back on and it clicked so i figured it was good. i was able to bleed 4 of the 6 lined to the injectors but could not break 2 of them open. Do you think the air in those two may be the problem. Truck probly hasnt been started in 2 months.

 

[icman95]

Stupid question, but here goes:



If it's been sitting for 2 months, has anyting crawled up into the air intake or filter that might be blocking the incoming air? Mouse nest, etc?



Back to air in lines:



If there is air getting into the lines, then bleeding them might not help until you find the source of the air leak as more will just come in. Mine was on the o-ring around the fuel filter, but I think your 1gen has a different setup there than my 2gen. Also, I might not be right. Could be something else.

 

[JLEONARD]

How much fuel out of the injectors? A dribble or a very strong spray?

I got fuel to my injectors when my lift pump went south... seemed like plenty but it was not a strong spray.

New lift pump instant start.

Hope this helps.

 

[tx_fireman1525]

Not a real strong spray but i figured it was enough. Guess i will check into the lift pump

 

[peobryant]

Ever get it figured out?

 

[tx_fireman1525]

bought a new lift pump but its still in the box, havnt had time to deal with it yet

 

[tx_fireman1525]

put a new lift pump on it and still having problems. It takes alot of cranking to get it to start, if at all. Had to use some starting fluid a few times. Once it starts up it runs like a champ, but if i kill it, its hard to start. The longer it sits, the worse it gets

 

[JLEONARD]

It's got to be sucking air.

Don't use starting fluid. It can go bang if/when the grid heater cycles.

Use WD40 if you must use something. It's safer and will work just as well.

 

[tx_fireman1525]

Ya its gota be suckin air somewhere but i dont know where. I dont see any fuel leaking anywhere. Where do i start?



Do i still need to bleed each individual injector line even tho it runs fine once started? i figured it would get all the air out on its own.

 

[cerberusiam]

Do i still need to bleed each individual injector line even tho it runs fine once started? i figured it would get all the air out on its own.

No, they will purge on their own.



Sucking air is going to happen between the LP and fuel tank. From the LP to IP its pressurized.



The lines on the frame will rot and allow air in, or the fuel pickups will rot off and suck it in there.

 

[PToombs]

Sometimes they won't purge themselves. It's much easier on the battery if you open them up and bleed them.



To find a leak, make sure the lines are dry, then put air in the tank and check for wet spots. If you don't find any, unplug the fuel heater and do it again.

Sometimes the heater will suck air thru the plug because the terminal got hot and melted the plastic. Usually it's an overnite thing when it does this though.

 

[TBartlett1]

This may be an easy fix!!

I had this same problem with a first gen a while ago, the customer said his truck was starting hard and would stall, and it got to the point where it needed to be towed in order to get it running. I told him to bring it up & I'd look at it. As he was turning into my driveway it stalled as he slowed to make the turn so we pulled it up to my shop. I loosened the injector nut & cranked it and got a good squirt of fuel but it would not fire.

I pulled the pump & started to tear it down. When I put a socket on the triangular plug on the head of the pump it was finger tight. I disassembled the pump head & could see no damage so I reassembled the pump retorqued the large plug on the head and reinstalled. I bleed the lines & it started right up. For some reason the plug or cap on the distributor head loosened allowing high pressure fuel to leak by which is why I could bleed the injector but it would not fire because the loose plug would not allow enough pressure to build to fire the injector.

You need a special socket which I improvised. I torqued it to approx 40 ft lbs, I do not know the proper torque.

You do not need to remove the pump to tighten the plug, but may need to remove a few lines from the pump.

You should only need to bleed the first 3 injectors to get it running.

Tim