Updated: 1993 Nissan Fuel Pump Always On


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Lukewarm Heat............

New antifreeze reverse flush heater core...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

2014 Nissan Sentra Shaking

Car recently started shaking when accele...

Buy Flualprazolam Powder Online Whatsapp: +1(424) 328-1086

N/A

1989 toyota pickup 3.0 crank no start

I have a 1989 toyota pickup 3.0 crank no...

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

Updated: 1993 Nissan Fuel Pump Always On

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Car Troubleshooting

jasonspelts
Novice

Aug 31, 2015, 11:35 AM

Post #1 of 4 (1646 views)

Updated: 1993 Nissan Fuel Pump Always On

I posted earlier about having fuel pump issues. There was a short behind the dash. I fixed the wiring, hooked everything back up, and cranked the engine. Wouldn't start. Fuel Pump Relay just clicked, fuel pump wouldn't hum.

Tested the FPR. Works fine. Jumpered the connections for the FP. Hummed beautifully. Did some reading, and came to the conclusion the fuel pump relay had a bad ground. Looked at the bundle of wires going through the firewall and said, "there's got to be a better way..."

So I spliced the ground wire from the fuel pump relay harness, and ran it directly to the engine block.

Now when I turn the key to the "ON" position, the fuel pump hums like a champ.

PROBLEM: The fuel pump doesn't stop humming. I'm pretty sure it's only supposed to hum for 2 seconds to prime the engine.

So I'm obviously missing something. Question is what? Can anyone out there tell me what's going on? Is the ground from the FPR switched by the computer? Any help is GREATLY appreciated!!!

Thanks,
Jason

(This post was edited by jasonspelts on Aug 31, 2015, 1:46 PM)

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Aug 31, 2015, 2:08 PM

Post #2 of 4 (1620 views)

Re: Updated: 1993 Nissan Fuel Pump Always On

OK - you found something and notice more but please continue on your original thread not make a new one which makes us hunt around for things already done or what.

I won't but expect this thread to be locked and continue with the other please,

T

jasonspelts
Novice

Aug 31, 2015, 2:27 PM

Post #3 of 4 (1615 views)

Re: Updated: 1993 Nissan Fuel Pump Always On

Yeah, I fixed the first issue (bad ground on the fuel pump relay) but ran into the new issue.

So now I'm guessing that the ground wire is actually switched by the computer. I'm considering just running a new ground wire from the relay to the computer. Just I have no idea where the computer is on a 93 Nissan pickup (v6)...

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Aug 31, 2015, 4:06 PM

Post #4 of 4 (1606 views)

Re: Updated: 1993 Nissan Fuel Pump Always On

Locked! Didn't want any more on this new thread. Saw the original. Can't follow two threads on same subject matter/vehicle and make any sense,
T

Search for (options) Privacy Sitemap