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Fuel pump?

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Bad vacuum and or vacuum should not affect the fuel pressure and cause no fuel and no pressure

If you hear the pump coming on and no fuel pressure
Have to check fuel pump module inside the tank and the hoses that connects it to the outlet
When 1st key on and or when cranking the fuel pump should come on
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
WRESTLERJF
  • MEMBER
  • 3 POSTS
  • 1995 DODGE NEON
  • 4 CYL
  • 2WD
  • MANUAL
  • 120,000 MILES
My fuel pump is not working, but I dont belive it is out. I noticed the (fuel pump) fuse under the hood was blown. So I replace it, I drove about 100yard and the fuse blew again. I once again tried to replace it and this time it blew as soon as I turned the car over. I'm guessing the wiring is grounding out somewhere, but I can figure out where. Any ideas? Also, I was thinking of running a wire from the pump to the battery (or fuse box). Would this work? If so what one is the positive on the fuel pump, theres 4 wires. 2 blacks, a blue, and a black with white stripe.

Any help would be great!

Note* To access the fuel pump is on the bottum of the fuel tank. No need to drop the tank (wierd I know)
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum, that fuse supplies voltage to the fuel pump relay--asd relay--pcm. The asd relay supplies voltage to the coil primary--injector/s-- 02 heater circuit, maybe one or two more. You might unplug the relays one at a time, see if the fuse still blows. I have heard of the 02 heater circuit shorting out causing a problem. Unplug all the 02 sensors, see if it makes a difference? Any codes? We appreciate the donation.
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
WRESTLERJF
  • MEMBER
  • 3 POSTS
Any idea if running a wire from the fuel pump to the battery will work? Just to be able to drive it back to my house so I can work on it there
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hi, if the problem is on the asd relay circuit, the vehicle won't start even if you run the pump all day. If the pump itself is blowing the fuse, it isn't safe to wire around anything. I'm a member of this site and have been told not help bypass anything. I'll talk to my boss.
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
WRESTLERJF
  • MEMBER
  • 3 POSTS
Ok thanks! I was only going to do it to get the car home, but I understand. Thnx for the help!
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
MOR_REEN
  • MEMBER
  • 1 POST
  • 1995 DODGE NEON
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 12,000 MILES
Where is the fuel pump relay on the 1995 dodge neion
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hey again, if you use a jumper wire from battery voltage to the output terminal for the switch side of pump relay, the pump should run. Be sure to use an inline fuse on the jumper. If the fuse still blows, you know the problem is on the pump circuit.


https://www.2carpros.com/forum/automotive_pictures/170934_voltage_here_1.jpg

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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
It's in the power distribution center, under the hood.


https://www.2carpros.com/forum/automotive_pictures/512072_neon_power_distribution_center_1.jpg

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-1
Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 1995 DODGE NEON
My fuel pump fuse keeps (20a) blowing? When I put a new fuse in and I first turn my key on, I can hear my fuel pump engage as I continue to crank to it over that's when it blows.
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Try going to the tank and unplug the connector to the pump and then put a new fuse in and crank the engine as if you are trying to start it, even though it isn't going to start and then see if it blew the fuse. If it didn't, then replace the pump.
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
BRIAN3066
  • MEMBER
  • 3 POSTS
  • DODGE NEON
I have a 1995 neon and the little 20amp fuse keeps blowing could it be the fuel pump itself or is it a wireing problem please help thanks brian
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
BACKYARDMECHANIC
  • MECHANIC
  • 337 POSTS
If the fuse blows as soon as you replace it with the car off then its the wiring. If the fuse blows when you turn the key on then I would suspect the pump. Try and wiggle the wiring harness for the fuel pump and see if the fuse blows. If it does then the wiring harness is shorted some where. To further check that its the pump see if you can disconnect the harness to the pump at the tank and then turn the key on. If the fuse holds then plug the harness back in and see if the fuse blows. If it does then the pumps bad. Hope this helps. Backyard mechanic :)
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
BRIAN3066
  • MEMBER
  • 3 POSTS
Thanks but its not the pump I changed it and ran new wire from the pump harness to just under the dash before the wires went into 2 diff baxes one was a little black conector the other was going to a a bigger silver box I believe could one of those be gone I changed the fuse box under the hood and also the computer there are just to live wires and 2 grounds the grounds go to the trunk and they are good im still looking should I change those 2 conector things thanks brian
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Thursday, December 17th, 2020 AT 8:37 AM (Merged)
Tiny
SURELDABROWN
  • MEMBER
  • 4 POSTS
  • 1995 DODGE NEON
Electrical problem
1995 Dodge Neon 4 cyl Two Wheel Drive Automatic N/A miles

Hi my dad owns a 95 dodge neon sports car and is currently haveing a problem with it it wont start due to the fuel pump fuse blowing what else runs off or what else is connected to the the fuel pump fuse (20 amp)? We disconnected the fuel pump wireing harness and we checked the relays and its still blowing but what else could be connected to that fuse that might be causing this problem or even if it cant be causing the problem we still want to know what else is connected to that fuse so we can pinpoint the issue better thanks
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Thursday, December 17th, 2020 AT 8:38 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Powers Automatic Shut Down relay and PCM. Pull ASD see if that is culprit. Take ohm meter place one lead to ground the other to non power side of fuse what does it read?
Let me know
Thanks for donate
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Thursday, December 17th, 2020 AT 8:38 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
The fuse feeds three circuits. Unplug the fuel pump relay and the Automatic Shutdown (ASD) relay. If the fuse still blows, the Engine Computer or wiring to it is shorted to ground.

Plug the fuel pump relay back in. If the fuse blows, the pump, or more likely, the wiring to it is shorted to ground.

Plug the ASD relay back in. If that causes the fuse to blow, look at the igition coil, injectors, alternator field, and oxygen sensor heaters.

The two relays will not turn on if you plug them in after the ignition switch is turned on. They only turn on for one second after the ignition switch is turned on, then again when the engine is rotating, (cranking or running).

Caradiodoc
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Thursday, December 17th, 2020 AT 8:38 AM (Merged)
Tiny
SURELDABROWN
  • MEMBER
  • 4 POSTS
Powers Automatic Shut Down relay and PCM. Pull ASD see if that is culprit. Take ohm meter place one lead to ground the other to non power side of fuse what does it read?
Let me know

Ok I tryed pulling the ASD relay and the fuel pump relay and the fuse still got blown but we decided to disconnect the PCM and the fuse did not blow but is what we are trying to figure out is if its the wireing or the PCM its self and ideas?
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Thursday, December 17th, 2020 AT 8:38 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
If it was a short in wiring then fuse would still blow with PCM disconnected. So PCM must have internal short
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Thursday, December 17th, 2020 AT 8:38 AM (Merged)
Tiny
SURELDABROWN
  • MEMBER
  • 4 POSTS
If it was a short in wiring then fuse would still blow with PCM disconnected. So PCM must have internal short

OK well will a bad PCM cause a scanner not to work? Cause I tryed to plug it in and it wont even come on I plug it in my truck and it wokrs just fine
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Thursday, December 17th, 2020 AT 8:38 AM (Merged)

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