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Author
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Topic: I have spark but no fuel!
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Gear Head
JARED
Member # 779
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posted
2003-10-20 01:04 PM
 
 
When I turn my car to the on position I can't hear my fuel pump prime anymore, but instead I hear a click coming from under my driver's seat(the fuel pump relay?). When I go to start my car it turns over I just have no fuel.
Did my relay go out or do I need a new pump?
Thanks
Jared
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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4RS FED
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Member # 2067
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posted
2003-10-20 01:04 PM
new pump.... ![[patriot]](graemlins/patriot.gif)
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i have a twin turbo mustang and you don't!
Posts: 3686 | From: 650 | Registered: Nov 2002
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Fast472Mach1
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Member # 2559
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posted
2003-10-20 01:06 PM
Check your wires before replacing anything.
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11.7@116 1.7 60ft. N/A
11.4@124 1.9 60ft. 100NX
Posts: 639 | From: Laguna West | Registered: Mar 2003
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66 AC COBRA
Nitrous King
Member # 904
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posted
2003-10-20 01:16 PM
if the relay is clickin it sounds like ur pump died
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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Gear Head
JARED
Member # 779
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posted
2003-10-20 01:23 PM
Anyone else have any ideas? I am looking on Summit @ the BBK 255 In tank Elec. Fuel pump for $130.
What do you guys think?
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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BlackNGold
CaliforniaFords.com
Moderator
Member # 655
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posted
2003-10-20 04:36 PM
I think I would buy and replace the fuel pump relay first...They're cheap (less than $10)and easily replaced....Pumps are more expensive and harder to replace...
Make sure you didnt accidently hit your inertia switch in the trunk too...
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-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
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yellow67stang
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Member # 903
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posted
2003-10-20 04:59 PM
Is there gas in the tank?
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I like cars.
Posts: 371 | From: Ca. | Registered: Feb 2002
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Blue Oval
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Member # 2548
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posted
2003-10-20 05:00 PM
if the relay is clickin that means its working.id replace the pump but check the wires first.
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65 Coupe 306, AFR's
89 Cali. Ed. Saleen "sold"
BAB 89 GT
08 Yamaha R6
Posts: 2345 | From: Sacramento | Registered: Mar 2003
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Gear Head
JARED
Member # 779
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posted
2003-10-20 05:20 PM
Yes I have gas in the tank and it's about half way full. That's going to suck if I have to replace the pump with a half way full tank. Yes the relay is clicking when I turn the key to the on position but the pump isn't priming. The wires all look good that are going into the relay. Someone over at stangnet also told me to check the inertia switch which I have done but I don't really know what it's supposed to look like when it's normal or it's tripped. Here's the pics of it. A guy over there told me to press the red button and when I tryed to do that it didn't even compress so I don't know. It didn't do anything for me at all.
My car almost has 160k on it so the pump might have just taken a dive.
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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Blue Oval
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Member # 2548
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posted
2003-10-20 05:23 PM
i forgot but i think mine has a white button,if i remember correct its towrad the bottom or on the bottom of the swicth.maybe someone else can clear this up.
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65 Coupe 306, AFR's
89 Cali. Ed. Saleen "sold"
BAB 89 GT
08 Yamaha R6
Posts: 2345 | From: Sacramento | Registered: Mar 2003
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Unregistered
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Member # 786
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posted
2003-10-20 05:33 PM
Jared, if you need a relay I have one for you, $7, call me if you want it
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Gear Head
JARED
Member # 779
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posted
2003-10-20 05:35 PM
Ok cool Kevin the guys over at stangnet said to just get a relay and try that before I go and replace the pump since they are so cheap.
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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Stimson
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Member # 51
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posted
2003-10-20 06:27 PM
Here is what you do....
1) Make sure the fuel pump is seeing electricity.
2) on top of the gas tank where its closest to the rear bumper, there is a 4 wire connector in the middle. Unplug it.
3) 2 of the 4 wires are ground
4) 1 of the 4 wires is your fuel level signal
5) 1 of the 4 wires is power to your fuel pump.
6) Put your volt meter between ground and this power wire.
7) Have someone put the ignition key in the on position. If the pump is getting juice, the meter will show ~12Volts for ~2 seconds.
8) If you see no voltage, drain the gas tank and replace the pump
Posts: 2373 | Registered: Jun 2000
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Gear Head
JARED
Member # 779
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posted
2003-10-20 07:13 PM
Ok this is the connector I unplugged, it was the only one that I saw under there. I don't have a volt meter just a test light so I used that instead just to see if I had any type of electricity back there, wich I didn't. I probed with the test light on each of the four connectors on both ends while having someone turn the key to the on position. I had no electricity what so ever with the test light.
Does it sound like I did all of that correctly? Should I get a volt meter and do it again? I think I am just going to purchase a new pump. Anyone have any links to sites with the install, I have never done one before?
[ October 20, 2003, 07:15 PM: Message edited by: 91sleeper ]
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
2003-10-20 07:22 PM
if u tested all the pins and got no electricity at any pin, then its not the fuel pump, that means that something is bad between the pump and the cpu probably, could be the relay, could be the inertia switch, when my inertia switch popped when i hit a big rock (8" round rock) i had to push the switch up and down a few times and just keep fiddling with it until the pump came back on, it took a few trys to get my switch to reset
see if u have power at the inertia switch goin into it, if u have power at the switch, but not goin out of it, its the switch
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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Stimson
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Member # 51
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posted
2003-10-20 07:26 PM
Are you sure you're probing the connector that goes to the wiring harness, and not the conector that goes to the fuel pump/tank?
1) Clip the test light to metal part of the chassis.
2) Have someone repeatedly turn the ignition key on-off-on-off (They relay should be clicking on and off durring this time)
3)At the same time probe each of the 4 wires coming from the wiring harness of the car (Not the gas tank)
4) If the test light turns on, then chances are good its a fuel pump: http://www.corral.net/tech/maintenance/fpinstall.html
If you have an Ohm meter, you can also check to see if your pump is burnt out or not. The fuel level signal will have ~75 ohms resistance with respect to ground if your gas tank is about half full.... the pump power wire will have I'd say a dozen or less ohms with respect to ground if the pump is good.
[ October 20, 2003, 08:03 PM: Message edited by: st5150 ]
Posts: 2373 | Registered: Jun 2000
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Gear Head
JARED
Member # 779
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posted
2003-10-20 07:28 PM
quote:
Originally posted by 66 AC COBRA of CA PERFORMANCE:
if u tested all the pins and got no electricity at any pin, then its not the fuel pump, that means that something is bad between the pump and the cpu probably, could be the relay, could be the inertia switch, when my inertia switch popped when i hit a big rock (8" round rock) i had to push the switch up and down a few times and just keep fiddling with it until the pump came back on, it took a few trys to get my switch to reset
see if u have power at the inertia switch goin into it, if u have power at the switch, but not goin out of it, its the switch
Well that's why I kept asking about the switch! I actually got rear ended the other week at about 5 miles an hour but have been driving the car for another week or so without problems.
When you say,"see if u have power at the inertia switch goin into it, if u have power at the switch, but not goin out of it, its the switch" do you mean to unplug it and probe the connectors there? Does the car have to be in the on position? How in the hell do I reset this switch and what does it look like when it's tripped and when it's not? That's what I need to know.
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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Gear Head
JARED
Member # 779
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posted
2003-10-20 07:33 PM
quote:
Originally posted by st5150:
Are you sure you're probing the connector that goes to the wiring harness, and not the conector that goes to the fuel pump/tank?
Sawson I honestly don't know what connector that was for. I only saw one connector which is the one that I posted a picture of. I pulled them apart and then probed both sides which would be eight pins total while my GF was turning the car to the on position and then to the off position and the relay was clicking at this point. Yes I also had the test light grounded to the chasis and I got nothing.
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
2003-10-20 07:44 PM
quote:
Originally posted by st5150:
4) If the test light doesn't turn on, then chances are good its a fuel pump: http://www.corral.net/tech/maintenance/fpinstall.html
why do u keep saying that if there is no power at the plug its the pump, if there is power at the switch and the pump wont turn on the the pump is bad
but if the plug has no power, then the pump wont turn on just because there is no power, not because the pump is bad, if the pump was bad he would still have power at the plug
to check the inertia switch leave the plug in it, u need to use ur test light to poke throw the wires, thats why its so sharp (needle like), and test the wires, for power in and power out
just move then inertia switch up and down a few times, i think its in the "on" postion when the red button is down, depressed, not up ![[Razz]](tongue.gif)
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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Gear Head
JARED
Member # 779
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posted
2003-10-20 07:48 PM
quote:
Originally posted by 66 AC COBRA of CA PERFORMANCE:
quote:
Originally posted by st5150:
4) If the test light doesn't turn on, then chances are good its a fuel pump: http://www.corral.net/tech/maintenance/fpinstall.html
why do u keep saying that if there is no power at the plug its the pump, if there is power at the switch and the pump wont turn on the the pump is bad
but if the plug has no power, then the pump wont turn on just because there is no power, not because the pump is bad, if the pump was bad he would still have power at the plug
to check the inertia switch leave the plug in it, u need to use ur test light to poke throw the wires, thats why its so sharp (needle like), and test the wires, for power in and power out
just move then inertia switch up and down a few times, i think its in the "on" postion when the red button is down, depressed, not up
I was thinking the exact same thing as I was probing the connectors. I will go try to check the inertia switch again.
Thanks for the help bro.
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
2003-10-20 07:50 PM
and im 99% sure that the black plug comes from the car
the orange pump is from the tank
since i am at school, i am havin my dad go look at the car right now, my tank is out cause im sumpin it so he can look real quick
basically check the black plug very well
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
2003-10-20 07:53 PM
quote:
Originally posted by 91sleeper:
[QUOTE]as I was probing the connectors.
lol u were probing the connector
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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Gear Head
JARED
Member # 779
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posted
2003-10-20 07:59 PM
Ok so I was messing around with the inertia switch and got the red button to pop up. Then I plugged the connector back in down at the tank and thought it was going to work but it didn't. So ijust pushed the red inertia button up and down a few times to see if I could reset it or something and still no luck. ![[Confused]](confused.gif) ![[Frown]](frown.gif)
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
2003-10-20 08:02 PM
did u check power, do u even have any power at the inertia switch comin from the fuel pump relay, it could still be the realy even if it is clickin, just try it
if u have a chiltons manual or equivalent it should give a diagram of the relay, then by that u can test the relay with a power source, like a jumper wire from the battery
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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Gear Head
JARED
Member # 779
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posted
2003-10-20 08:08 PM
How do I probe the wire if I don't unplug it from the inertia switch? Punch it right through the wire? If so I tryed that for both of the wires that go to the inertia switch and had no elec. there either. Does the car need to be in the on position when I try to probe the wire?
[ October 20, 2003, 08:11 PM: Message edited by: 91sleeper ]
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Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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