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UPDATE: we changed the fuel and return lines they showed leaks when we pumped air into the gas tank. It now starts immediately! It drives good, but i think i feel a slight miss now. I do have a small leak in the new line which we will fix Saturday. We had to make the lines because no one had them

Now where to find the lines? I think it's a little tricky because it's a "cab and chassis model" but is standard cab 135.5 wb. any help would be appreciated. I see dorman makes something that s says Rear; Standard Cab Pickup; Return and another that says feed but I am not sure. I was also...

Didn't look at the FFM or IP. once leak at a time

It's a dump so seeing the top of the tank is the easy part. The sending unit does look good. The concern I have with making lines is that they are crimped flex lines to the steel hard lines. My question regarding the siphon was to try to understand how the return line leaks would cause air to...

Was able to pressurize the system with a few pound of air in the filler neck and noticed a few damp spots on the return back to the tank. Finally found something that may point to the problem. Looks like the line has started to rust through where the factory hold downs are. Would this cause our...

I will give them both a try, thanks

just started it parked up hill . We could see air bubbles in the clear tube we installed. it was empty before start then bursts of small air bubbles every 10 seconds for about two minutes. then engine engine smoothed out. Is there a way to pressurize the system or put dye in the fuel?

Does not seem to make a difference with the level of fuel in the tank. This is a dump truck with dual tanks. I believe it lifts from the back tank to the front tank then lifts to the FFM. I had read about pressurizing the fuel system with 3-4 psi through the tank fill to force the leak. Anyone...

When the truck is cranked or just begins to run there is no sign of fuel unless it's so clean it's fully transparent) in the clear tube. After a few seconds when it is running a couple small air bubbles pass through. We cracked all 8 injector lines prior to cranking after sitting nose uphill...

I will tell you of all the places I have inquired, you guys are the most help. I will try it all and let you know

we put that in but didn't see that many bubbles on start or when running

How can I find where the air is getting in to the system? is there a test? I did park the truck facing downhill last night and this morning it fired right up! Mayb cranked for 3 seconds.

It cranks at least twice as long without any sign of starting, then starts to show signs of the hit- stall. It finally starts with black smoke running very rough for a minute then it runs fine. yesterday we towed a backhoe with it up some steep hills. It was laboring. When we got back it had...

Truck only has 68k on it. injectors 3000miles (off ebay https://www.ebay.com/itm/Chevy-GMC-6-5-6-5L-Diesel-injector-nozzles-/152593256002?hash=item2387444e42 ). we put a clear line on and get a couple of small bubbles on start and a couple as it runs. not a lot. I will park it nose down tonight

Hi, need some help with this truck. When cold (80 degrees this morning) it cranks and cranks then starts and runs rough with black smoke. In a minute that clears up and it runs fine. If I shut it off, it starts right back up fine. We have two year old injectors, glow plugs are new and work...