just the other day my truck started to bog down and it shut off. i think i might have a bad pump. i tried cranking it and i could hear the pump responding, but after about a minuet i tried cranking again, but it cranked very slow... the pump was pumping super slow as well. i have not checked the fuel pressure yet i need to get on that. i can check the fuel pressure while the truck is just cranking right? and does anybody now what problem i might be having? thanks
-louis

 

Hi Louis! Our trucks have a mechanical fuel pump off the factory floor. Unless you can also hear a mouse pissing on a cotton ball in Korea, I don't think you will be able to distinguish the pump pumping at cranking time.
You will need to have good batteries at cranking time to troubleshoot it. I would throw some jumper cables on it and try again. If you are in a cold climate I would also plug it in for the easier start.
Why do you think it is fuel related? What have you done so far? Do you have enough fuel? (sorry for sounding so elementry, just trying to cover everything) Have you pulled the filter to see if you have fuel in the bowl? Have you cleaned the "FPR screen"? Do you have the WTS light?

 

nothing done to the truck.. i figured the batteries might have something to do with it for sure. but im guessing its a fuel issue cause my fuel filter light came on along with the bogging and shutting down. i also want to add that the filter is about 1 week old lol i mihgt have run the truck on 1 quarter of fuel during the period i had the new filter. (im pretty sure thats bad) but now the truck has a quarter and a half and it was running smooth until all this ^^^ happend. but at the moment, i am completly CLUELESS

 

I would drain the bowl with the lever on the front AND clean the "FPR screen". This will get the water and junk out of the bowl. Once you have done that, when you cranker again, it should fill the bowl back up (proving the pump is working). I would find out what your fuel pressure is once you getter running again. Are you messen with it today or just getting some ammo together to tackle it later? Also, I would recommend rebuilding your bowl/FPR assembly when the weather breaks (you will be amazed at all the junk in it).

 

The trash that collects at the bottom of the fuel bowl is unbelievable. It's not a good idea to run the truck w/o a fuel filter ever. The injectors for these things are expensive. Sounds like you got some trash in the fuel system beyond the filter portion of the bowl. I would start with the FPR screen also. You might want to shim it while your in there for a little better pressure also.

 

actually my old filter was just a nightmare. i only had it for like 6000 miles, but it was a mess. there was also trash on the bottom of the bowl. like rust colored mud. so i changed the filter, a week later it bogged and died. i took the filter out and there was mud in the bottom again. its from the tanks right? so would i have to clean the fpr to perfection?

 

yeah i actually just wanna get it cleaned today. im probally going to clean the fpr and the bowl. i really hope to make a electric fuel system this year. does an electric fuel system really help tho?

 

A Dirty FPR will severely affect fuel pressure, I try to clean mine out every few months (cut a Q-Tip in half and use the stick side, works great). I am no electric fuel expert, but I don't think it hurts anything on a stocker, but is definitely required if you plan on heavy mods. The stock pump cannot keep up with the heavy demand. I am sure someone else will chime in with a more technical answer. Good Luck!

 

This is my knowledge of the electric system...take notes and save the link!
Turbo Encabulator - YouTube

 

Nice... very nice... had me rolling by the 25 sec mark. I can see how this video really captures the Fuel System. Genius!!! Why didn't I think of that!

 

Electric fuel pumps will never be as reliable as a mechanical fuel pumps. However, like was stated if you want big power you need to upgrade. Not only will the electric pumps provide more gpm , but, the size of the fuel line will be upgraded as well. This change over really cleans house on all of the cobbled up mess produced by the stock fuel bowl and mech pump. The electric systems come with regulated returns too. This way the fuel pressure can be adjusted with an allen wrench where the stock set up can only be increased with a shim and that wont get you much more.

I bought a Swamps baby fuel system when I changed mine over. The kit comes with everything you need to do it for about $700.00. I have a real easy to get to spin on fuel filter down by the frame now and it has a petcock on the bottom to drain the water off of the fuel like the stock set up.

The electric fuel system makes running out fuel an easy fix also. Not that that happens very often, but, if it does you just put some fuel in the tank and turn the key on.

 

im going to have to look into the electric fuel systems soon. i plan on getting bigger injectors later on down the road.

well i went to look at my truck to see what i could do, it seems like the light is dim for my poor baby. but honestly, i think all i need is new batteries. the truck cranks very slow like the batteries are super low on power. so im hopeing its nothing major... good batteries play a huge roll in the seven three right?

 

It takes at least 10.7 volts for the inj's to operate, but , it doesnt have anything to do with a manual fuel pump not supplying fuel to the bowl.

 

Did you getter running yet? Do you have a multimeter to troubleshoot your batteries/charging system?

 

I had a similar issue. Ultimately victory was mine after pulling and really cleaning the fpr. There was a clog in the smallest orifice on that guy. I soaked everything in carb cleaner and starting blowing through each port and almost blew my cheeks out when I met the clog. It popped free, reassembled w new o rings, and fired right up. You oughta get an o ring kit, pull the bowl and fpr, CLEAN, reassemble, and see if that helps. Sounds like you could use it either way and for $12 + cleaner it's well worth its cost.