Cars & Trucks Logo
les duggan
les duggan Posted on Dec 27, 2011
Answered

Lost electrical power to fuel pump

New fuel pump no electrical power

Answer This Question

1 Answer

Kirk King

Kirk King

Level 1:

An expert who has achieved level 1.
MVP:

An expert that got 5 achievements.
New Friend:

An expert that has 1 follower.
Corporal:

An expert that has over 10 points.

  • Contributor 18 Answers
  • Posted on Dec 27, 2011
Kirk King
Contributor
Level 1:

An expert who has achieved level 1.
MVP:

An expert that got 5 achievements.
New Friend:

An expert that has 1 follower.
Corporal:

An expert that has over 10 points.

Joined: Dec 27, 2011
Answers
18
Questions
1
Helped
13082
Points
33

There are many reasons why fuel pumps have no power, most (in tank) fuel pumps fail due to low fuel inside of tank.

These fuel pumps turn at an alarming rate which in turn causes an alarming amount of heat. This heat is then dissipated by the fuel inside of the tank itself.If the driver/operator allows to run the fuel very low and continue to do so, this will over time allow for the fuel pump to overheat due to the ONLY source used to cool the fuel pump is the fuel inside of the fuel tank itself. Electrically, view the operator's manual or similar source to locate fuel pump fuse and/or relay of which will open the electrical path when the fuel pump overheats.
This should be a pretty good starting point to locate/isolate electrical issue you may be experiencing.

Good Hunting to you & hope this gets you back on the road soon!
FASTESTNASCAR

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
1answer

I have a 96 sonoma put new fuel pump in checked all the grounds relays good still no power to fuel pump there is power to purple wire no power to gray oil pressure switch has power to reduce wire but...
Fuel pump electrical circuit diagnosis no fuel pressure testing GM
GM Fuel Pump Relay Testing

Read full answer
Jul 08, 2018 • Cars & Trucks
0helpful
2answers

1992 Ford E150 has no power to fuel pump, inertia switch good, relays good, new pcm i am lost.
the pressure regulator controls the power requirement to the fuel pump
when pressure is reached , it allows power/circuit to the ECM to be broken which in turn stops the pump relay from working
when the pressure drops , that circuit is energized and the ECM switches on the circuit , to the relay allowing power to the pump to supply fuel to get the pressure back up
for the circuit operation you will need a schematics of the electrics for the vehicle ( workshop manual) as some may not use the ECM but go straight from the pressure regulator to the relay through a fuse
Read full answer
Jun 14, 2017 • Ford Cars & Trucks
1helpful
1answer

My fuel pump is good, but foe some reason it's not getting any electrical power from the line....what should I do?
Well Jason you could have a bad fuel pump relay in the underhood electrical center . The PCM - powertrain control module turns on the relay . An your vehicle has a anti-theft system probably ! Is there A security light lit on the dash ? If not pull the fuel pump relay out of the electrical center an check for power an grounds , there will be two grounds an one battery voltage an one open . The open will be power when cranking the engine , this is the control side from the PCM . If you look on the side of the relay there should be a circuit diagram , an on the bottom the pin's should be marked 30 , 87 this is the fuel pump side of the relay. 87 is battery voltage , 87 goes to the fuel pump . Pin's 85 , 86 . 86 is ground an 85 is power from the PCM when cranking ! GM Fuel Pump Relay Testing
Read full answer
May 09, 2015 • 1997 Pontiac Grand Prix
0helpful
1answer

They replaced my car with new battery but still stalling - no power at all. What do you think is the problem?
power?

electrical power, as in dim lights
or engine power, like you can go up a hill fast wide open throttle
is it just quick loss of engine power or constant.
hot engine cold engine or both.?

stalls come on may ways.
1: lost DC electrical power lost to EFI system.
2: lost compresson, fails hot?
3: lost spark , try a 60k mile tuneup now, if skippped, they are critical.
4: bad fueling

there are simple tests for each failure path./
do you want to, do you have tools, ???? or just want guessing../?????

ok , i will guess, warning all of mine are wrong.
1: the Fuel pump regulator is bad stuck wide open and fuel pressures
is 1/2 spec at 15psi, car is gutless all the time.
one down 49 to go..
Read full answer
Feb 02, 2014 • 1997 Toyota RAV4
0helpful
2answers

I have a 98 Camaro I put a fuel pump in fuel filter an my car still won't start.Do thank the gas line clog up?
If you know for a fact the pump is getting power and ground, and nothing is coming out of the line before the filter, then yes the line could be clogged up.
Read full answer
Aug 03, 2013 • Cars & Trucks
0helpful
1answer

Isnt getting any power to the fuel pump
Should be a designated fuse for the power to the fuel pump I'm not familuar with this model but some vehicals with electric fuel pumps have a reset swich on the pump or under the hood on the fire wall.
Read full answer
Aug 22, 2012 • 1987 Toyota Supra
0helpful
1answer

2003 honda element - it lost power while driving about 60 mph and then turned to come home.. going about 15 mph and lost power and started jerking - it did not die and the electrical was working - battery...
You should start with the basics, are you getting fuel and air to the engine and spark at the plugs? Is the battery being charged? When did you last change the fuel filter? Does the car still start and run?
Read full answer
Jan 08, 2011 • Honda Element Cars & Trucks
0helpful
1answer

No electric on grey wire ... new fuel pump wont work
On this year the oil sending unit runs in the circuit with the pump a bad oil sending unit will cause no power to the gray power wire. Check that next
Read full answer
Jun 21, 2009 • 1996 Chevrolet Monte Carlo
1helpful
1answer

Lost Power to Fuel pump
There is a fuel pump fuse in the fuse box, also there is a fuel pump relay under the hood in the power control box, One of these is ur problem.
Read full answer
Mar 06, 2009 • 1999 Oldsmobile Alero
0helpful
2answers

My s-10 will not pump any fuel
Check on top of the tank and make sure there are no kinks in the hoses leading off the pump. Also I have run into situations where the new fuel pump simply died due to faulty assembly at the factory.
Read full answer
Jul 31, 2008 • 1991 Chevrolet S-10
Not finding what you are looking for?

View Most Popular

1987 Mercedes Benz 190 Class

  • Cars & Trucks

Related Question

I have a 96 sonoma put new fuel pump in checked all the grounds relays good still no power to fuel pump there is power to purple wire no power to gray oil pressure switch has power to reduce wire but...

  • Cars & Trucks

Related Topics

332 views

Ask a Question

Usually answered in minutes!

Popular Questions

Wiring diagram for mercedes 190e w201

1989 Mercedes-Benz 190

Engine shut down

1993 Mercedes-Benz 190

I need a diagram of a serpentine belt

1987 Mercedes-Benz Mercedes Benz 190...

Mercedes vito heater not working

1993 Mercedes-Benz 190

What kind of transmission fluid does it take

1989 Mercedes-Benz 190

Check Out the Latest Top Trucks Report!
Check Out the Latest Top Trucks Report!

View all Fixya Reports

Top Mercedes-Benz Experts

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

xxxxxx xxx

Level 3 Expert

5117 Answers

Arnie Burke
Arnie Burke

Level 3 Expert

7339 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...