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Author
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Topic: fox wont turn over......fuel pump bad?
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mikeP
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Member # 4489
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posted
 
 
while driving today (91 fox vert) car all the sudden cuts out on me...try to start it back up, it turns over but wont start..i hear a cosistant humming noise from the fuel pump when it use to just humm for about 5 seconds. i left the keys in the ignition now my batt is dead as well im assuming from the fuel pump and that constant humm.. do i need a new fuel pump fellas?? thanks in advance
-mikeP
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91 vert lx 5.0, 68 CS, 69 BB nova
Posts: 975 | Registered: May 2004
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Jaejae5.0
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Member # 7958
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posted
Maybe the relay is sticking ? Check under the driver side seat fr a green an black relay
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1987 notchback h/c/i 302 & 70mm turbo SOLD
2000 camaro ss cam only
Posts: 4890 | From: the combustion chamber | Registered: Oct 2007
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mikeP
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Member # 4489
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posted
located the relay how do i check for proper funtioning of the relay?
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91 vert lx 5.0, 68 CS, 69 BB nova
Posts: 975 | Registered: May 2004
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triple b
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Member # 8763
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posted
auto zone can test it
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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mikeP
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Member # 4489
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posted
weird just reconnected the relay and now the fuel pump does not sound like its priming....anymore tips?
sorry guys just know the basics lol..
[ August 10, 2012, 10:06 PM: Message edited by: mikeP ]
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91 vert lx 5.0, 68 CS, 69 BB nova
Posts: 975 | Registered: May 2004
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mikeP
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Member # 4489
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posted
not the relay, just bought a new one and now the fuel pump is not even priming...could it be anything else besides my pump? maybe the computer? just want to make sure before i start paying for crap i dont need.....thanks again
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91 vert lx 5.0, 68 CS, 69 BB nova
Posts: 975 | Registered: May 2004
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triple b
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Member # 8763
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posted
u need to put a gauge on ur fuel line 0psi for sure bad pump buy one and take out the valve on the schrader valve on the fuel line by the rail an have some one turn ur car on
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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sic70stang
CAFords OG
Member # 4347
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posted
Had this issue twice. It came down to the computer. See if a buddy will let you swap one for a quick test.
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The anti-crew
1987 rolling safety violation.
Posts: 6940 | From: California | Registered: Jul 2005
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LXjames
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Member # 10791
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posted
Does your car have significantly more power than stock with a non upgraded pump?
Do you often drive with low fuel level?
I'm thinking the pump is burned out. Could be another reason as to why but I believe the pump burned out
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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sic70stang
CAFords OG
Member # 4347
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posted
The reason I suspect a ecu is because the pump was stuck on rather turn priming the sexonds as it should. Try my simple idea first before you chase unicorns
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The anti-crew
1987 rolling safety violation.
Posts: 6940 | From: California | Registered: Jul 2005
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racsirx
CAFords OG
Member # 1710
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posted
It can be computer but if the computer replacement isn't the problem, I have had the distributor and the fusible links next to the solenoid and the ground next to the battery which has that detachable connector on it give me starting issues like this. I had a convertible come in this week which was thought to be a bad fuel pump but further checking, it wasnt reading enough voltage to the pump and it was just a bad ground next to the battery.
[ August 11, 2012, 02:57 AM: Message edited by: racsirx ]
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88 Saleen #564
88 GT 331 NOVI2000
88 Coupe TURBO 9.75@142
95 Cobra R #75-SOLD
06 F250
13 BMW AH3
17 GT350 #5556
GOD'S NOT DEAD
Posts: 20750 | From: Concord & Pittsburg, CA | Registered: Aug 2002
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86- 50
TEAM PLATINUM
Member # 4723
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posted
quote:
Originally posted by ECOboostin:
Had this issue twice. It came down to the computer. See if a buddy will let you swap one for a quick test.
Had this issue also, and it was the computer.
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My baby:88gt 347 stroker
RIP MATT, Gone but never forgotten
TEAM PLATINUM
Posts: 1796 | From: richmond | Registered: Jul 2004
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mikeP
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Member # 4489
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posted
ok. dropped the fuel tank and took out the fuel pump...hard connected the + and - to the batt and it seems that the pump is still functioning and spinning ok. just wanted to rule this out but anymore suggestions, im trying to get a hold of a computer to see if its that before i go spend some money..once again thanks again guys for the input. i look like a man that has been rolling around on the dirt for a couple roles and damn dont you hate when shit gets in your eyes grrr!!!
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91 vert lx 5.0, 68 CS, 69 BB nova
Posts: 975 | Registered: May 2004
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85notch fo-eye
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Member # 10637
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posted
I had the same problem it was the two relays next to the mass air they wasn't making good contact my cuzn cleaned them up an the pump chime on u can try that
Posts: 145 | Registered: Feb 2011
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mikeP
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Member # 4489
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posted
been working since 9am and still havent found what is going on. went to pick&pull to pick up a computer but no luck. full pump is good ruled out since i stuck back in the tank and hard wired it to a batt and it shot out real good. anyways anyone know how i could be getting low voltage all way back to the fuel pump its like at 2.2. racirx this is exactly what is happening. im getting 12v at the relay but after that the fuel pump shut off and the pump connection im reading both 2.2V's so im not getting enough juice. ive checked the grounds with the screws next to the battery and they seem good. do you know which particular ground it was??? damn i feel so close yet im so f'n burnt the hell out.....im selling this damn car after im done..
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91 vert lx 5.0, 68 CS, 69 BB nova
Posts: 975 | Registered: May 2004
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85notch fo-eye
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Member # 10637
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posted
That's exactly how mine was it was reading low voltage at the back and it ended up being those two relays that are by the mass air take them out and see if u cam clean them up mine wornt making good contact my cuzn cleaned them and it worked hope that's ur problem
Posts: 145 | Registered: Feb 2011
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mikeP
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Member # 4489
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posted
and the winner is................ecoboostin ![[worship]](graemlins/worship.gif) !!! i just picked a computer up and said f it since i could not think of anything else and checked everything you guys said grounds, fuse links, relays, fuel pump, connections, car alarm....connected it checked my voltage to the back and wala 12VOLTS!!!! hooked up the fuel pump while tank was on the ground turned key right before starting and there was the priming 3 secs of the pump and fuel spitting out!!! f*** man if only i knew...anyways thanks fellas for all the great advice and chasing the unicorns around lol..now i just need to put all this shit back together. it was a great learing experience and def. dont over look the computer probably the easiest thing if you can just swap one out and check it..thanks again and thanks to alex the dood who sold me the computer in milpitas for a great price!! ![[dance]](graemlins/dance.gif) ![[patriot]](graemlins/patriot.gif)
btw this link was a great help as well:
web page
[ August 12, 2012, 09:48 PM: Message edited by: mikeP ]
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91 vert lx 5.0, 68 CS, 69 BB nova
Posts: 975 | Registered: May 2004
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