1993 Geo Tracker Won't start when cold

Tiny
ISLANDMARINER
  • MEMBER
  • 1993 GEO TRACKER
  • 4 CYL
  • 2WD
  • MANUAL
  • 165,698 MILES
A relay, I believe for the fuel pump under the drivers side dash cuts in and out when starting. The fuel line at throdle body leaking and car will only start with starter fluid. Will the fuel line leak reduce the fuel pressure to cause the relay to cut in and out and keep the injectors from working at low fuel pressure? I had a blazer that fuel leaked in the throdle body causing flooding that kept the car from starting after sitting over night. The rest of the time the Blazer ran fine just like this GEO Tracker.
Wednesday, March 26th, 2008 AT 11:38 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Will the fuel line leak reduce the fuel pressure. Yes and has nothing to do with a relay-what you are dealing here with is an electrical problem.

If its the fuel pump relay that's making the clicking sound-check the circuit to it-who knows its shorting out-
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Thursday, March 27th, 2008 AT 8:47 AM
Tiny
ISLANDMARINER
  • MEMBER
  • 6 POSTS
I replaced the leaking fuel line. The car runs good but still won't start after shutoff. I can hear the fuel pump wine and then the relay starts clicking. If the fuel pump works ok when the car is running why isn't there gas to get it started? Does starting require more fuel pressure than running? Could the fuel pump be the cause of relay kicking in and out? Can I test the relay with an ohmmeter and 12v contact? Is there a procedure to test the relay? Is there a procedure to test the fuel pump in the car? If I put a pressure gage on the fuel hose and crank the engne I should be able to check the pressure. Will the gas hurt the pressure gage? The car does have throdle body injection. Could the injector system be flooding the engine like my old Blazer? Of course that wouldn't explain the relay cutting in and out. Seems to me the relay is pointing to a problem with the fuel pump.
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Thursday, March 27th, 2008 AT 2:31 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If the fuel pump works ok when the car is running why isn't there gas to get it started? Bcuz the fuel pump and oil sending unit is providing the power when the engine's oil pressure is above 4lbs and running.

Your problem is coming from these possible areas computer relay control, fuel pump relay,fuel pump and its wiring-

Check the fuel pressure and look for excessive voltage drop in the circuit. See below circuit


https://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_37.gif

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Thursday, March 27th, 2008 AT 3:59 PM

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