Question about 1991 Geo Tracker

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1991 tracker I put in a new fuel pump relay. the new relay has power comming to teh relay the wire going to the fuel pump has no power. put the jumper wire in and the pump runs. Why won"t the power go through the relay?

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Probably becuase its faulty...try replacing it and go from there...or else there is another source of resistance in the circuit some where....also, check your fuses....a blown fuse will stop flow of current as well.

Posted on Nov 14, 2009

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Fuel


old post 1991 a 8valve engine????
it ran before? or not? if not you did the diagnosis wrong, ask?
does it crank? no, then.
if you read the fsm it said disconnect battery first.
forget to put it back?
keyon, CEL lamp glows, it must or you blew up to 3 ECU fuses.
say it cranks,
fuel pressure not 34psi but 0 or 10
you did it wrong.

http://www.fixkick.com/nostart.html

the first test for dead fuel system after proving
that is what
check output of fuel pump relay for 11 to12v cranking
if good the at pump. actual
if no power to pump all old and new pumps are useless
ask how to finish this process..

Mar 27, 2014 | 1991 Geo Tracker

2 Answers

Cant find fuel pump relay on 1991 geo trcker


the 91 is below the ECU, the socket is green , the relay has a huge
pink wire, which is pump power.
did you find the bad ground in 2door car? is it? behind the left rear tail
light, the pump grounds with a screw there, all trackers (sidekicks) fail there. , and kill the pump, it the first check on all . with low or zero pressure.
post symptoms and can take you to it fast.
just a no start ?
this year, kick has pump power for only 3 seconds keyon
that be rule 1.
and pump power 12vdc cranking and running.
the wire is pink at the left tail light too.

every pump that ever failed, in every way possible, is here.
read this.

http://www.fixkick.com/INJECTORS/PUMP/dead-pump.html


2door or 4 door is first quesiton.

here is my 91
and my FP relay

http://www.fixkick.com/INJECTORS/PUMP/Fuel-Pump-Relay1w.jpg

Mar 27, 2014 | 1991 Geo Tracker

1 Answer

95 Buick LeSabre 3.8 L which is the fuel pump relay?


You can usually go by the wire colors. The fuel pump relay wires are pink, gray, black, and green with a white stripe. When troubleshooting a fuel pump that is not coming on, the relay is the best place to figure out why. You can pull the relay out and put a jumper wire from the battery to the terminal with the gray wire. If the pump runs, you know that isn't the problem. Then turn the key on and use a jumper between the terminals with the pink and gray wires. If this turns the pump on, you know the ignition switch is sending power to the relay, and the fuse is good. Pull that jumper out, but leave the key on. Push the relay back into the socket, but put a jumper from a ground point to the terminal with the black wire. If that turns the pump on, the ground wire is bad. If not, the PCM is not turning the relay on. Reasons for that may be a bad wire from the PCM, a passlock issue, or the PCM fuse/power wire.

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Jun 14, 2011 | 1995 Buick LeSabre

3 Answers

I have a 02 grand caravan, there is fuse call asd that keeps on blowing.


Well in a short term, you have a short circuit somewhere. Here is a detailed toturial for you. Please rate this post, thank you.

Automatic Shutdown (ASD) sense - PCM Input

The ASD sense circuit informs the PCM when the ASD relay energizes. A 12 volt signal at this input indicated to the PCM that the ASD has been activated. This input is used only to sense that the ASD relay is energized.
When energized, the ASD relay supplies battery voltage to the fuel injectors, ignition coils, and the heating element in each oxygen sensor. If the PCM does not receive 12 volts from this input after grounding the ASD reley, it sets a Diagnostic Trouble Code (DTC).

Automatic Shutdown Relay - PCM Output

The PCM operates the Automatic Shutdown (ASD) relay and fuel pump relay through one ground path. The PCM operates them by switching the ground path for the solenoid side of the realys on and off. Both realys turn on and off at the same time.
The ASD relay connects battery voltage to the fuel injectors and ignition coil. The fuel pump relay connects battery voltage to the fuel pump.
A buss bar in the power distribution center (PDC) supplies voltage to the solenoid side and contact side of the relay. The ASD relay power circuit contains a 20 amp fuse between the buss bar in the PDC and teh relay. The fuse also protects the power circuit for the fuel pump relay and pump. The fuse is located in teh PDC.
The PCM controls the relay by switching the ground path for the solenoid side of the relay on and off. The PCM turns the ground path off when the ignition switch is in the Off position. When the ignition switch is in the On or Crank position, the PCM monitors the crankshaft position sensor and the camshaft position sensor signals to determine engine speed and ignition timing (coil dwell). If the PCM does not receive the crankshaft position sensor and camshaft position when the ignition switch is in teh Run position, it will de-energize teh ASD relay.
The ASD relay and fuel pump relay are located in the PDC near the battery. The inside top of the PCD cover has a label showing relay and fuse location.

ASD and Fuel Pump Relays

The following description of operation and tests apply only to the Automatic Shutdown (ASD) and fuel pump relays. The terminals on the bottom of each relay are numbered.

'------------------'
' __85 ___________'
' __87A '87 '30 ___' Sorry for the crudeness of this. This is supposed to
' __86 ___________' be the relay terminals!
'------------------'

OPERATION
- Terminal number 30 is connected to battery voltage. For both the ASD and fuel pump relays, terminal 30 is connected to battery voltage at all times.
- The PCM grounds the coil side of the relay through terminal number 85.
- Terminal number 86 supplies voltage to the coil side of the relay.
- When the PCM de-energizes the ASD and fuel pump relays, terminal number 87A connects to terminal 30. This is the Off position. In the off position, voltage is not supplied to the rest of the circuit. Terminal 87A is the center terminal on the relay.
- When the PCM energizes the ASD and fuel pump relays, terminal 87 connects to terminal 30. This is the On position. Terminal 87 supplies voltage to the rest of the curcuit.

TESTING
The following procedure applies to the ASD and fuel pump relays.
(1) Remove relay from connector before testing.
(2) With the relay removed from the vehicle, use an ohmmeter to check the resistance between terminals 85 and 86. The resistance shoud be 75±5 ohms.
(3) Connect the ohmmeter between terminals 30 and 87A. The ohmmeter should show continuity between terminals 30 and 87A.
(4) Connect the ohmmeter between between terminals 87 and 30. The ohmmeter should not show continuity at this time.
(5) Connect one end of a jumper wire (16 guage or smaller) to relay terminal 85. Connect the other end of the jumper wire to the ground side of a 12 volt power source.
(6) Connect on end of another jumper wire (16 guage or smaller) to the power side of the 12 volt power source. Do not attach the other end of the jumper wire to the relay at this time.

WARNING: DO NOT ALLOW OHMMETER TO CONTACT TERMINALS 85 OR 86 DURING THIS TEST.

(7) Attach the other end of the jumper wire to relay terminal 86. This activates the relay. The ohmmeter should now show continuity between relay terminals 87 and 30. The ohmmeter should not show continuity between relay terminals 87A and 30.
(8) Disconnect jumper wires.
(9) Replace the relay if it did not pass the continuity and resistance tests. If the relay passed the tests, is operates properly. Check the remainder of the ASD and fuel pump curcuits.

__________________________________________________ _______________

I know you said you replaced the relay, and this is a test procedure for the relay, but I have bought bad parts in the past. The description before the test procedure at least gives you an idea of what components are wired through and controlled by the relay. One of those may be faulty. Email me if you want or need wiring diagrams and I should be able to scan them and email them to you.

I hope this helps.

Please rate this post, thank you

Apr 07, 2011 | Dodge Grand Caravan Cars & Trucks

1 Answer

We can't get our 1991 GEO Tracker to start


I had this problem as well. The tracker had sat for 8 years and would only run off of starter fluid. I replaced the filter and fuel pump then I had no fire. Located under driver side dash in the fuse panel theres a fuse for coil. I don't remember which one, but, I am pretty sure it is a 10 amp fuse. Or just do like I did and replace any bad fuses. If that doesn't work it will be a relay located above that same fuse box.

Aug 01, 2010 | 1991 Geo Tracker

1 Answer

Not getting fuel blows out fuelpump relay


You have either a shorted wire going to the fuel pump or a bad fuel pump. I'd guess you have a bad pump, wires enter at the top of the tank anyway, so probably water condensation has rusted the pump.

Aug 11, 2009 | 1991 Geo Tracker

5 Answers

On a 1991 geo tracker trying to find location of fuel pump relay?


The fuel pump relays are mounted on an "L" bracket underneath the ECM. Both have something to do with the Fuel pump. Be careful not to get it confused with the horn relay it is in the same vicinity (under the dash on the drivers side).

Feb 18, 2009 | 1991 Geo Tracker

2 Answers

On a 1991 geo tracker trying to find location of fuel pump relay


Have the computer checked. My Dads Tracker was doing the exact same thing and it turned out the computer was bad. I'm afraid it wasn't cheap to get the computer refurbished either. ($500)

Feb 18, 2009 | 1991 Geo Tracker

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