Fuel pump relay

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
What model?
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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
CHASETARD
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  • 3 POSTS
1987 chevrolet 1/2 ton 2wd 5.7ltr 350ci TBI customdeluxe 10 P.O.S.


https://www.2carpros.com/forum/automotive_pictures/370299_061809_2015_1.jpg

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+13
Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 1991 CHEVROLET TRUCK
  • 45,000 MILES
I have a no start and have replaced the fuel relay and still nothing everything I've read said to check the ecn b fues, but I can't find the location. Can you help me with that?
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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
That is the fuel pump relay do not know what Auto Zone gave you. Find orange and red wire jumper this will hot wire pump.
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+3
Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If it cranks good, but, won't start, have helper crank it, while you visually check for spark at the spark plugs. If you have spark everywhere, use a gage and check fuel pressure. How long since a tune-up? Are there any applicable mil codes? You can check mil codes, yourself. Use a jumper wire between the A & B terminals at the datalink connector. Turn key just till dash lites come on, no further. The mil lamp on the dash starts flashing. You count the flashes to get the codes. Your looking for two digit codes.

To test for spark, you can use a spark tester. Plug it into the spark plug boot, ground metal part of tester to metal part of engine, engine cranking, watch for spark at the tester. The autostore sells a spark tester, doesn't cost much. There are other ways to check for spark, but, the tester is the safest, if you don't like getting bit by secondary ignition voltage, which I don't.

Do you still want the location of fuse box?
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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The fuse block is under left side of dash.
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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
AUDREYSDUANE
  • MEMBER
  • 1 POST
I ran into the same problem, Auto Zone does not carry anything like this, and LMC Truck caries the same thing as Auto Zone. Where can I get the right part?
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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
PASTORED
  • MEMBER
  • 1 POST
  • 1994 CHEVROLET TRUCK
Engine Mechanical problem
1994 Chevy Truck V8 Two Wheel Drive Automatic

where is the fuel pump relay switch located, under hood where, is it inside something. Or is it under the dash
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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
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Attached to passenger side firewall, under hood..


https://www.2carpros.com/forum/automotive_pictures/261618_Noname_1438.jpg

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+4
Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
BILLABBOTT
  • MEMBER
  • 1 POST
  • 1993 CHEVROLET TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 175,000 MILES
Where is the fuel relay for a 1993 Chevy 4x4 350ci automatic work truck?
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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The fuel pump relay is located on right side of firewall near battery jucntion block-see item location no.3 below


https://www.2carpros.com/forum/automotive_pictures/12900_fp_relay_3.jpg

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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
ROSUL22
  • MEMBER
  • 4 POSTS
  • 1991 CHEVROLET TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
Can you tell me where these are located and what exactly they do?
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Friday, February 8th, 2019 AT 8:01 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Your vehicle does not have an intertia (fuel cut-off switch) and the fuel pump relay is similar to a switch that flips on and off. When key is turned on in ignition it flips the "switch" (fuel pump relay) on which allows electrical current to flow to the fuel pump. Your vehicle's fuel pump relay is located on the right side of the firewall, behind the battery junction block cover.
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Friday, February 8th, 2019 AT 8:01 PM (Merged)

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