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1990 geo tracker automatic 1.6l 8 valve throttle body injected. not getting power to fuel injector, checked with noid light, fuel pressure to injector good, spark good, ecm good help

Posted by Mark Walser on

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3 Answers

Stoney Thompson

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  • Master
  • 440 Answers

May be a sttlupid question but did you check fuses and relays? Also, a faulty crank sensor or cam sensor will cause no power to the fuel system as well.

Posted on Jul 22, 2021

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gia thiet ke nha

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Posted on Jul 22, 2021

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Vernon Taylor

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  • Geo Master
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I am not familiar with the model. Single point injection would normally inject almost continuously and if the wiring diagram was checked it would probably show the injector power comes direct from the same supply as the ECU uses and the ECU will provide the ground path if the ECU (ECM) is good and is receiving the correct data from the various sensors.
This provides possibilities: -
Bad ECU.
Bad wiring.
Insufficient information from sensors.

If there is an immobiliser it is worth checking it is properly disarmed.

Posted on Mar 23, 2020

5 Related Answers

Anonymous

  • 1392 Answers

SOURCE: no injector pulse, no current to the injector

Check the pickup in the distributor as this is the cam sensor. The injectors run of the pulses created while the rotor is turning around. It should be a plastic disk located under the rotor button.

Posted on Mar 13, 2009

Anonymous

  • 4088 Answers

SOURCE: 1987 chevy s10 2.5l tbi will not start. changed

That eliminates the crankshaft and camshaft position sensors. Have you checked the fuel injector itself for an open winding or stuck valve plunger? There should not be a steady 12 volts to the injector--if good injector, it would be spraying fuel steadily into the throttle body. But at least the engine should try to run if poorly. Take the injector out, dry it off with air, and intermittently apply 12 volts to one terminal while grounding the other. You should hear a click from inside every time you touch 12 volts. If not, replace it. If it does, it may be plugged with debris. Try blowing through it in reverse with compressed air.

Posted on Jul 17, 2009

Anonymous

  • 5 Answers

SOURCE: 1987 chevy engine problem

you have to reset base idle see manual at library for procedure

Posted on Jul 19, 2009

Dale McNair

  • 78 Answers

SOURCE: 1993 geo tracker fuel injector

ecm does control but is also based on input from the Throttle position senser. unplug the TPS and try again. Also make sure the ECM and engine grounds are good

Posted on Feb 21, 2010

Anonymous

  • 1 Answer

SOURCE: 1990 chevy blazer 350 ci throttle body fuel

truck is missing and it back fires, started after i washed engine, replaced distributercap,plugs,wires,coil,ignition model,throttel body sencer,map sencer, its still missing. brake warning light flashes 7 times and stays on on the 7th flash. please heip

Posted on Jun 10, 2011

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Does a geo tracker have a hot and ground injecter wire

no. the TBI works unique.
it has a driven ground and driven hot,
unlike any 1992 tracker with MPI engine 4 injectors.

if the NOID lamp test fails. the ECU is bad if the fuses IG-coil are good , "FI"f fuse, good, and no DTC errors?
and ground to the TPS is not cut.
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What causes injector not firing gas?

FUEL INJECTOR NOT FIRING COULD BE FAULTY FUEL INJECTOR.HOOK A NOID TEST LIGHT TO FUEL INJECTOR ELECTRICAL CONNECTOR. CRANK THE ENGINE WATCH THE NOID TEST LIGHT SHOULD BE BLINKING WHILE ENGINE TURN OVER.IF TEST NOID LIGHT STEADY PCM FAULTY NOT FIRING THE FUEL INJECTOR.IF FUEL INJECTOR DONT BLINK OR LIGHT UP.YOU HAVE OPEN WIRING CIRCUIT TO THE FUEL INJECTOR CONNECTOR.
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My 1992 geo tracker wont start but if u spray starter fluid in it it will then quit

Guys-no schrader valve-and 92 doesn't have scan capability. Its a fuel problem-so listen at fuel tank inlet with cap off and have someone turn key to on, not start, ON. Hear the pump run for 2 to 3 seconds??, Pump may be ok. next find fuel inlet on back of throttle body and loosen it, don't remove. Key on again does fuel spill out of connection? Pump is OK! Tighten up fuel inlet to throttle body. Make a jumper wire with a 5amp fuse in the middle and alligator clips on each end. Locate the POWER wire to the injector, red I think. Pierce the power wire with a pin or whatever and attach one alligator clip to the pin and the other clip to the positive battery post. Start the car!! IF it starts and runs, the circuit in the PCM that provides power to the injector has burned out. Rebuilt ECMs are on ebay. Common failure. Good Luck!
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No injector pulse, no current to the injector

Check the pickup in the distributor as this is the cam sensor. The injectors run of the pulses created while the rotor is turning around. It should be a plastic disk located under the rotor button.
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94 Geo Tracker is getting gas to the throttle body but will not get gas or voltage to the injector?

dead Injector 8valve.

use a NOID lamp to see if ECU is pulsing this
injector.

http://carfix.stufftoread.com

see line that says injectors....xxxxxx
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