Fuel pump fuse , fuel pump regulator , fusible link , ignition module , oil pressure switch/sending unit , pickup coil , fuel pump ground wire !!! If you have no test equipment start with cheapest and easiest items first , use a 9 volt battery to test injectors ... listen to the relay and fuel pump turning key to on position , inspect all connections for rust or corrosion , look for broken , worn or frayed wires .... And Pray To God Alot !!!
The only test equipment I don't have at least for this old truck is a fuel pressure gauge so I might just go buy one of them put it on my inline filter and check my pressure and if I don't have good fuel pressure I'll go from there I cannot figure out barely even start this time I've died in the middle of the highway a couple months back and I replaced all of the ignition system except for the actual distributor shaft because the shaft still looked good after cleaning yes one of them parts may have somehow gone faulty again but I have good spark to me it seems like a vacuum or a fuel pressure issue and I can't find good info on what my injector spray should look like when they should spray yada yada definition of goose chase and you ain't kidding when you say pray a lot
Your video was great, we learned a lot about the fuel system, but we had a definite Slingblade moment ( ain't got no gas in it, lol) - the problem was actually the fuse under the dashboard! Blown fuse for the injector relay. We changed our the alternator, which was going out, fuel pump, filter and fuel pump relay before I realized/remembered the fuse panel inside the truck! But your video was spot on, thanks!!
Great video!!! I'm in bed and my truck is parked a block away where it died. My fuel pump is good because I changed it twice. 😩 The relay location on my truck is in poor condition. Wires exposed. I'm wanting to get dressed and fix.lol I'll wait for the morning. Thanks a lot bud!
I am from Saudi Arabia and I think that the reason for the damaged fuel pump is the depletion of fuel and the best refueling in the last third of the tank
Also, there is , well, on my 92 gmc truck, an oil pressure switch, behind the distributor that routes the 12vdc to the fuel pump! My truck's switch broke after 28 years while I was going to a doctor's appointment. Switch was $34, Tow back to my house $124.
I understand that a faulty oil pressure switch will not cause a crank / no start condition on the OBD1 systems but on 96 & later OBD 2 systems the spark /fuel is disabled to prevent engine damage due to a no / low oil pressure condition. I had an occasional no start condition on a 91 & i found the oil pressure gauge was not working so i swapped out for a new one but the problem re occured. The ground wires are where I'm looking now. These are definitely weak points on these older trucks.
Watched this cause I had sort of the same problem. Only you might want to look at the ignition control module witch is located on the distributor. That's why I was getting no fuel. Replaced that and truck had fuel again.
Yeah I replaced that years ago when the engine wouldn't fire up after shutting the engine off (once it reached normal operating temperature). I remember having to wait maybe a half hour and then it would start and stay running again.
@@shauntelreyes3544 Pull the distributor cap off and then the rotor. It's screwed down to a horizontal metal plate (heat sink) and has 1 or 2 connectors. (can't remember)
It was mice in my case. Truck had been sitting awhile. When I got access to the Fuel pump I found that the wires had been chewed through. After replacement I put a mouse deterrent on the wires. Spray adhesive then Cayenne pepper, wrapped with electrical tape then another layer of adhesive and pepper.
Fuel pump fuse , fuel pump regulator , fusible link , ignition module , oil pressure switch/sending unit , pickup coil , fuel pump ground wire !!! If you have no test equipment start with cheapest and easiest items first , use a 9 volt battery to test injectors ... listen to the relay and fuel pump turning key to on position , inspect all connections for rust or corrosion , look for broken , worn or frayed wires .... And Pray To God Alot !!!
The only test equipment I don't have at least for this old truck is a fuel pressure gauge so I might just go buy one of them put it on my inline filter and check my pressure and if I don't have good fuel pressure I'll go from there I cannot figure out barely even start this time I've died in the middle of the highway a couple months back and I replaced all of the ignition system except for the actual distributor shaft because the shaft still looked good after cleaning yes one of them parts may have somehow gone faulty again but I have good spark to me it seems like a vacuum or a fuel pressure issue and I can't find good info on what my injector spray should look like when they should spray yada yada definition of goose chase and you ain't kidding when you say pray a lot
Your video was great, we learned a lot about the fuel system, but we had a definite Slingblade moment ( ain't got no gas in it, lol) - the problem was actually the fuse under the dashboard! Blown fuse for the injector relay. We changed our the alternator, which was going out, fuel pump, filter and fuel pump relay before I realized/remembered the fuse panel inside the truck! But your video was spot on, thanks!!
I appreciate your positive comments drakko769. Thanks!
Cut the splice out and go back with a fusible link like it had before. The fusible link is a protection device.
Great video!!! I'm in bed and my truck is parked a block away where it died. My fuel pump is good because I changed it twice. 😩 The relay location on my truck is in poor condition. Wires exposed. I'm wanting to get dressed and fix.lol I'll wait for the morning. Thanks a lot bud!
Thank you and you're welcome. I hope you're truck is up and running again.
I am from Saudi Arabia and I think that the reason for the damaged fuel pump is the depletion of fuel and the best refueling in the last third of the tank
This was helpful to me. I didn't know where the fuse link was. Problem solved
Thanks!!!!!!! So nice. I hope this is the problem
Thanks for the video- I am going to go try all of that. FYI liquid electrical tape is really handy.
Also, there is , well, on my 92 gmc truck, an oil pressure switch, behind the distributor that routes the 12vdc to the fuel pump! My truck's switch broke after 28 years while I was going to a doctor's appointment. Switch was $34, Tow back to my house $124.
I understand that a faulty oil pressure switch will not cause a crank / no start condition on the OBD1 systems but on 96 & later OBD 2 systems the spark /fuel is disabled to prevent engine damage due to a no / low oil pressure condition.
I had an occasional no start condition on a 91 & i found the oil pressure gauge was not working so i swapped out for a new one but the problem re occured.
The ground wires are where I'm looking now.
These are definitely weak points on these older trucks.
Watched this cause I had sort of the same problem. Only you might want to look at the ignition control module witch is located on the distributor. That's why I was getting no fuel. Replaced that and truck had fuel again.
Yeah I replaced that years ago when the engine wouldn't fire up after shutting the engine off (once it reached normal operating temperature). I remember having to wait maybe a half hour and then it would start and stay running again.
Where is that ignition control module located.....?
@@shauntelreyes3544 Pull the distributor cap off and then the rotor. It's screwed down to a horizontal metal plate (heat sink) and has 1 or 2 connectors. (can't remember)
@@shauntelreyes3544 it has 3 connections. It's on the back side of the distributor. 2 screws.
But if it was the ignition control module, he would still have fuel, and no spark... right ??
I just changed my fuel pump/fuel filteron my 1994 ck1500 5.7 carb is not getting fuel
👍
Thanks man!
So the fuel relay wasn't bad? Just a corroded gray wire?
Correct
The relay was fine and still is.
Have changed my relay, still won't start. Could the fuse on the left of the relay be the problem??
I don't know.
Check your ignition control module
OK Robi, you got it out but, and I don't mean this to be mean, don't quit your day job.
It was mice in my case. Truck had been sitting awhile. When I got access to the Fuel pump I found that the wires had been chewed through. After replacement I put a mouse deterrent on the wires. Spray adhesive then Cayenne pepper, wrapped with electrical tape then another layer of adhesive and pepper.
Nice work
Can't u jump that relay
Brake cleaner will dry your wires out and make them brittle to the point they crumble. Just don't do it. If anything, use QD cleaner
Mines 2wd😪
Were you not hearing anything from the pump?
I did not hear the pump when the wire was bad because the relay wasn't getting power to turn the pump on, from what I can remember.
@@robi0305 That makes sense. Other people have actually had that relay go bad.
220,000 miles and still relaying. Haha
What happened to your elbow