Author Topic: Need help with the name of electrical wire harness  (Read 7988 times)

Offline rcollamore

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Re: Need help with the name of electrical wire harness
« Reply #15 on: April 13, 2016, 04:45:25 AM »
You guys are awesome!!! Well I changed out those wires and knock sensor but no luck with the engine starting.
I do see the issue though no fuel coming from the injectors that could be a problem lol ugh man always something

Offline bd

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Re: Need help with the name of electrical wire harness
« Reply #16 on: April 13, 2016, 09:27:16 AM »
Do you hear the fuel pump run for a couple of seconds immediately after switching the ignition on?  Check the ECM I and ECM B fuses.  Check the ECM ground connections at the thermostat and back of the right cylinder head.  Make sure that the distributor connectors are completely plugged in and that no pins are bent over.  Check the fuel pressure.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline rcollamore

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Re: Need help with the name of electrical wire harness
« Reply #17 on: April 17, 2016, 04:44:14 PM »
Ya the fuel pump turns on for a couple minutes when turned on. All the fuses are good.
I did find that there is no fuel in the fuel lines period none at all lol.
So I am guessing it's the Fuel Pressure Regulator am
I right?

Offline Irish_Alley

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Re: Need help with the name of electrical wire harness
« Reply #18 on: April 17, 2016, 05:09:44 PM »
no fuel in the fuel line, sure you got fuel in the tank? made that mistake once lol
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline rcollamore

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Re: Need help with the name of electrical wire harness
« Reply #19 on: April 17, 2016, 05:10:46 PM »
Lol ya I made sure I had a enough before I posted this question lol

Offline bd

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Re: Need help with the name of electrical wire harness
« Reply #20 on: April 17, 2016, 05:34:57 PM »
Check for a pinched fuel line and/or totally plugged f/filter.  If it has dual tanks the selector valve maybe sticking or plumbed to the wrong tank.

Substitute a pressure gauge for the f/filter, start the engine and take a measurement; pinch off the return line leading back to the tank and take another measurement.  What are the pressure readings?
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline rcollamore

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Re: Need help with the name of electrical wire harness
« Reply #21 on: April 17, 2016, 05:39:16 PM »
I have checked the fuel lines for anything pinched nothing there either I have already changed out the fuel filter when I did that there was no fuel even coming out of the lines when I removed the old filter.
I will have to get a fuel pressure reading gauge since I don't have one and to rent one autozone wants a 150$ deposit lol

Offline bd

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Re: Need help with the name of electrical wire harness
« Reply #22 on: April 17, 2016, 05:46:58 PM »
It could be a faulty or dislodged pump in the tank, or a plugged pickup.  When you replaced the fuel filter, did you notice whether the old filter contained any sediment?
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline rcollamore

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Re: Need help with the name of electrical wire harness
« Reply #23 on: April 17, 2016, 06:13:20 PM »
No I didn't notice anything out of the ordinary. I have tested everything minus the fuel pressure gauge test.
There is no fuel coming through the lines at all pretty much bone dry lol when I pour fuel into the carburetor it will start but of course die when its out of fuel.
I have ran air through the lines to see if there was a clog I wasn't able to find a clog when I did it.
So I assuming that it's the fuel pressure regulator

Offline Irish_Alley

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Re: Need help with the name of electrical wire harness
« Reply #24 on: April 17, 2016, 07:08:15 PM »
theres a little rubber line that attaches the fuel pump to the sending unit it could be busted and all the fuel is pouring out the side back into the tank
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline rcollamore

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Re: Need help with the name of electrical wire harness
« Reply #25 on: April 17, 2016, 07:17:57 PM »
Ok I think I would see that because my gas tank sits in back like this while I try to find someone to build me a custom tank or just mount this tank.
So that's why the gas tank is currently like this.
It helps though because I can see everything on the tank and accessing areas are a lot eas

Offline rcollamore

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Re: Need help with the name of electrical wire harness
« Reply #26 on: April 17, 2016, 07:21:47 PM »
Here is the pic I didn't get to attach to my last post

Offline Irish_Alley

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Re: Need help with the name of electrical wire harness
« Reply #27 on: April 17, 2016, 08:27:11 PM »
you wouldnt see it cause its in the tank itself. you have to take the sending unit out to see it
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline rcollamore

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Re: Need help with the name of electrical wire harness
« Reply #28 on: April 18, 2016, 12:14:24 AM »
I misread your post sorry it's a brand new fuel pump and that rubber hose was replaced in the process.

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Offline bd

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Re: Need help with the name of electrical wire harness
« Reply #29 on: April 18, 2016, 01:10:14 AM »
Well, the picture you've painted suggests either a faulty pump or improper installation.  With the pump running, can you hear fuel flowing inside the tank?  If you pull the 3/8" fuel line off of the fitting on the fuel tank pickup and cycle the pump for 1 second, will any fuel pump into a can or rag?
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)