I am new to the page. I have read posts trying to get help. I have a 94 3500 when the truck sits over night or for a long period of time. A little history on the engine. It has a new ip, new lp, custom exhaust, GLE eprom, different waste gaite actuator, done away with vaccum operated one. I have checked the lift pump pressure. it checked good. it has duraterm glow plugs new gp controller. checked all grounds they are good. All the ones that i know. New batteries and new battery cables. When trying to crank it acts like it has got an air bubble. tries to fire but doesnt. done a test by eliminating fuel sending unit and running truck out of a bucket. that test did not help either. Just put new fuel filter in thinking that might help (not). NEED HELP going crazy

air leak could be any of the lines from tank to ip. If it's not leaking fuel most likely pre lift pump

It does sound like a fuel delivery issue. Is there any fuel leaks, especially around the fuel filter? If you lossen off and injector line at the injector when cranking, is there fuel squirting out?

Does it start okay when its warm?

Welcome BTW.

Also please feel obligated to fill out your signature and even get some pics of that girl on here. :D

It does sound like a fuel delivery issue. Is there any fuel leaks, especially around the fuel filter? If you lossen off and injector line at the injector when cranking, is there fuel squirting out?

Does it start okay when its warm?

Welcome BTW.

Also please feel obligated to fill out your signature and even get some pics of that girl on here. :D




Yes it cranks fine when it is warm. it only gives problem when it sits for more than 8 plus. when i crack the injector line loose fuel does squirt out. It acts like it is sucking air when it sits over night. The rubber lines at he fuel filter housing is there a good kind of line i have regular fuel line on with small hose clamps.

what kind of fuel lines do you recomend using for the rubber lines

I used the Dipaco fuel return line kit. It is the no-clamp lines that have a braided sheathing over them. The only two clamps in the kit go on the plugs for the two back injectors.

What do you use for the supply line and where do you get the kit from

I know you have new LP but how is your OPS? OPS controls the LP after the engine start but if it is bad, the LP will turn off as soon as the engine start.

What do you use for the supply line and where do you get the kit from

I used standard fuel/oil resistant 1/4" rubber hose from the parts store.

My LP is straight wires key dependent hot.

I used standard fuel/oil resistant 1/4" rubber hose from the parts store.

sorry didn't answer the second part of your question... I got the Dipaco kit from a local diesel shop. They had it hanging on a hook behind the counter and it just happened to be the one for this truck. It included an upper intake gasket, 8 lines, 2 plugs/caps, and 2 clamps. $25... not bad

Still having cold cranking problem. Could the injectors be the problem??? :confused:

Before undertaking the task (or cost) of replacing the injectors, you should inspect your glow plugs. How many miles are on those Duraterms?

Does the vehicle smoke or stumble for a while once it starts? White smoke would be an indicator of leaking injectors or retarded IP timing... likewise black smoke and/or excessive carbon buildup on the GP's would be indicators of advanced IP timing.

How many miles are on the injectors?

I have a 94 chevy 1500 diesel it was starting an running beautifully in the cold, i plug it in have battery warmers, tried boosting once and it started but recently wouldn't start again. It turns over and over...but never fires, thought maybe fuel gelled but have additive in the fuel and its not cold enough. What is a likely cause for it not firing up? Thanks

Welcome to DP dommer! You should definitely check out the Stickies and fill out the check list and start a new thread that way your question will be seen by a lot more folks!

Depending on the mileage of your truck it could be a number of things. Once you fill out the checklist it should help the members hone in on the problem and give you suggestions.

i had the same problem unhooked the ect bam 3 spin fired with the lest amount of smoke ive ever seen come out of it got the stuff to do the glow plug fooler mod just need to get in the shop to do also i have 1000w block heater that works like a charm

The glow duraterm glow plugs only have about 50 or so miles on them. got different prices on injectors one is from heath diesel and the other one is from ss diesel supply dont know which one to go to

Before undertaking the task (or cost) of replacing the injectors, you should inspect your glow plugs. How many miles are on those Duraterms?

Does the vehicle smoke or stumble for a while once it starts? White smoke would be an indicator of leaking injectors or retarded IP timing... likewise black smoke and/or excessive carbon buildup on the GP's would be indicators of advanced IP timing.

How many miles are on the injectors?



The vehicle smokes and stumbles for a little then clears up. wen trying to crank it blows white smoke also. sounds like a fuel leak but have ckd all fuel lines and replaced ones that looked bad ,changed the o-rings on lift pump and sending unit.

2 things put a piece of clear tubing on the return line coming off the ip. You need to check for air bubbles in it second thing unplug the ect sensor in the coolant crossover next time you start it cold and see if that makes any difference.

I have tried unplugging the sensor and that did not help. i will try the clear tubing

I took the four injectors out on the driver side and had them checked. All four checked out fine per diesel injection shop. Injection shop said something about the fuel filter housing. So i eliminated the fuel filter housing and everything back for test purposes. The truck cranked a little better but did not crank right up but the temp outside was 18- 20 degrees with the wind blowing. The truck was plugged in trying to find someone to check my TDCO.

So did you have a lift pump on it at all? The ip (especially an older one) likes some pressure to it.

no the lipt pump was not connected