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Author Topic: No fuel to injectors  (Read 10492 times)

Offline Red87

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Re: No fuel to injectors
« Reply #15 on: February 22, 2017, 09:53:29 pm »
Quote from: Captkaos on February 22, 2017, 09:04:35 pm
the valve in the dash come out by just pinching the ends in.  You have to be flexible to get to it though.

Cool...thanks.

Well, here's my update:  replaced the tank selector valve and no dice.  However, I correctly made a 10-amp fused jumper wire and verified that the right fuel pump is energizing.  The right tank fuel pump connector has two wires, but the left tank has only one wire (at least, I believe that was the left fuel pump connector...it looked identical to the right fuel pump connector, except for just that one wire).  So I put my jumper wire on that one lead and did not hear the left pump energize.

So now I believe it's an electrical problem.  I guess I could've had my wife start the truck while I was down below energizing the fuel pump, or is that a bad idea?
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Offline Irish_Alley

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Re: No fuel to injectors
« Reply #16 on: February 23, 2017, 01:24:09 am »
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Offline Red87

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Re: No fuel to injectors
« Reply #17 on: February 23, 2017, 09:23:29 am »
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Offline Red87

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Re: No fuel to injectors
« Reply #18 on: February 23, 2017, 05:30:41 pm »
Got the switch out of the dash, but I can't figure out how it comes apart.  I'll order a new one anyway, but I'm about to "go postal" on this one.
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Offline VileZambonie

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Re: No fuel to injectors
« Reply #19 on: February 23, 2017, 06:59:52 pm »
There should be 3 wires at each tank unit. One goes directly to ground. Cavity A is B+ to the pump and cavity B is the sending unit wire. See attached
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Offline Red87

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Re: No fuel to injectors
« Reply #20 on: February 23, 2017, 11:05:56 pm »
Well I'll be a monkey's uncle.  Bought a $14 switch tonight, after going postal on the one I yanked out...and the dang thing started.  I can switch between the tanks, she idles great and got her power back, too.  Now on to getting my motorcycle back up and running...missing the great riding weather down here.

Thanks for y'alls help!   8)
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Offline Irish_Alley

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Re: No fuel to injectors
« Reply #21 on: February 24, 2017, 07:10:26 am »
did you change the switch or just mess with the wiring?
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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 Red87

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Re: No fuel to injectors
« Reply #22 on: February 24, 2017, 08:07:31 am »
Quote from: Irish_Alley on February 24, 2017, 07:10:26 am
did you change the switch or just mess with the wiring?

Bought a brand new switch.
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Offline hatzie

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Re: No fuel to injectors
« Reply #23 on: March 05, 2017, 07:49:09 pm »
Quote from: Red87 on February 24, 2017, 08:07:31 am
Quote from: Irish_Alley on February 24, 2017, 07:10:26 am
did you change the switch or just mess with the wiring?

Bought a brand new switch.
The rocker switch is cheap and 8 out of 10 times it's the problem. 
I replace em if they aren't brandy new.

Sent from my SM-P605V using Tapatalk

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Offline Red87

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Re: No fuel to injectors
« Reply #24 on: March 05, 2017, 10:51:02 pm »
Quote from: hatzie on March 05, 2017, 07:49:09 pm
Quote from: Red87 on February 24, 2017, 08:07:31 am
Quote from: Irish_Alley on February 24, 2017, 07:10:26 am
did you change the switch or just mess with the wiring?

Bought a brand new switch.
The rocker switch is cheap and 8 out of 10 times it's the problem. 
I replace em if they aren't brandy new.

Sent from my SM-P605V using Tapatalk

I wish I had known that before I tried all the other stuff, but now I know something else about the truck that I didn't before.  Another problem has come up, though...I have a fuel leak somewhere on top of the left tank.  My wife filled up the left tank a week or so ago, and when she came home, I told her there was a strong smell of gas from the left side of the truck.  Peeked down between the cab and bed and saw a pool of gas sitting there.  I ran that tank out and am now just using the right tank again until I can get to it to fix it.  Given the age of the truck, I'm thinking about just biting the bullet and replacing everything fuel related:  tanks, pumps, sending units and lines.  It looks like some of the lines are metal...is this correct?
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Offline Irish_Alley

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Re: No fuel to injectors
« Reply #25 on: March 06, 2017, 12:17:38 am »
well if its on top of the tank more than likely its the rubber hose
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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 Red87

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Re: No fuel to injectors
« Reply #26 on: March 06, 2017, 07:44:57 am »
Quote from: Irish_Alley on March 06, 2017, 12:17:38 am
well if its on top of the tank more than likely its the rubber hose

Yeah, but if I'm dropping the tank to replace that hose, might as well replace the other stuff, too.
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Offline hatzie

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Re: No fuel to injectors
« Reply #27 on: March 07, 2017, 04:22:20 pm »
Depends on what the tank and steel sender lines look like.  If they aren't rusty and leaky don't just replace them.

Replacement senders typically don't operate as well as the original Delphi parts.  The only reason to replace the fuel tank is if the tank is full of crud or rusty and full of holes.

I'd get about 10" to 12" of SAE J30R10 submersible fuel hose for the fuel pumps and 5' or so of SAE J30R9 Fuel Injection hose for the supply and return line connections from the senders to the frame lines and connections to the valve.

Use new German Fuel Injection clamps or new spring loaded constant tension band clamps in the correct size for your hoses.
« Last Edit: March 07, 2017, 09:36:05 pm by hatzie »
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SVC & wiring mans --> Here http://tinyurl.com/7387BRD-SVCMAN or My Bucket @ http://tinyurl.com/SQ-SVCMAN
Parts & Illustr Books -->http://tinyurl.com/SqParts
GMSTG Textbooks-->http://tinyurl.com/STG-TEXTBK
Radio Manuals-->http://tinyurl.com/DELCORADSVC

Offline Red87

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Re: No fuel to injectors
« Reply #28 on: March 07, 2017, 05:06:44 pm »
Quote from: hatzie on March 07, 2017, 04:22:20 pm
Depends on what the tank and steel sender lines look like.  If they aren't rusty and leaky don't just replace them.

Replacement senders are typically don't operates as well as the original Delphi parts.  The only reason to replace the fuel tank is if the tank is full of crud or rusty and full of holes.

I'd get about 10" to 12" of SAE J30R10 submersible fuel hose for the fuel pumps and 5' or so of SAE J30R9 Fuel Injection hose for the supply and return line connections from the senders to the frame lines and connections to the valve.

Use new German Fuel Injection clamps or new spring loaded constant tension band clamps in the correct size for your hoses.

Good info to know...thanks.
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