Will not start no injector pulse

TOYOTA 4RUNNER
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BATOSAI69
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I have a 1990 4 runner 22re, was running fine then developed a nasty oil leak but still ran good. Parked it that same day and it sat during the winter months. Went out to move it and it would not start. Found that it had no injector pulse, I have checked all the fuses and related relays I can find and everything else seems okay. I was able to pull a TPS related code earlier from it. When I went out this evening to verify which code it was the computer would not give me anything. I'm running out of options since there is no sense in rebuilding the engine until I figure out why it won't start now.. I was trying to make a new computer my last option but that's where I seem to be at now. any help would be greatly appreciated. Thanks in advance
Jul 25, 2007 at 10:26 PM
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RASMATAZ
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Check the power resistor that's the one that powers it,then the ECM grounds it through circuits 10/20.
Jul 26, 2007 at 5:02 PM
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BATOSAI69
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could you be a little more specific as to where this is located as the manual is more or less useless? thanks
Jul 26, 2007 at 6:57 PM
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RASMATAZ
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Disregard the power resistor,disconnect each injector connector check for battery power on the red/black and also on the distributor harness. Do you have it? If not check the ignition fuse/relay.
Jul 26, 2007 at 7:25 PM
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BATOSAI69
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thanks a lot. I will check that next.
Jul 27, 2007 at 5:53 PM
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BATOSAI69
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so I checked all four injectors with the key on and they are all hot on both sides.. what's the deal??
Jul 29, 2007 at 6:38 PM
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RASMATAZ
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You might have a problem in the quad driver in the ECM circuit 10/20 to include E2.
Jul 30, 2007 at 12:42 AM
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BATOSAI69
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so then whats the deal? new ECM?
Aug 2, 2007 at 5:43 PM
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RASMATAZ
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It depends on your diagnostics-did you test the 2 wires going to the injectors while ECM is disconnected for a short to each other-if they're you need to track it. Changing the ECM will not do you good. If not touching together-then we can assume its the ECM. That's the one that powers it on and off.

BTW do you have spark? if not it could get complicated if the ECM don't get the Ne/G/Igt signals it will not fire up the injectors-However the wires to the injectors are both Hot,when not suppose to. You need to find out could be an injector solenoid that can be dragging down the rest that involves the injection system.

Aug 2, 2007 at 6:27 PM
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BATOSAI69
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yes i do have good spark. the only issue is the sudden loss of injector pulse and yes i did have the computer disconnected for sometime and the reinstalled and found that it would give me no codes when connecting the 2 diagnostic terminals...e1 and te1 i believe they are. thanks in advance for any help.
Aug 4, 2007 at 7:02 PM
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RASMATAZ
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Okay, go find the power resistor it powers the injectors and the computer provides the grounding to turn it on and off.

You got me thinking here.

You said you have power on both pins at the injector connector. It tells me that the white/red or the white is touching the blue or yellow wire coming from the resistor.That's the only way to get power at both.
Aug 4, 2007 at 8:15 PM
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BATOSAI69
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can you tell me where the resistor is located as the electrical diagram in the manual is not good. Thanks
Aug 5, 2007 at 5:45 PM
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RASMATAZ
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If it's not on the pax side on the fender, it has 2-big connectors on it, it doesn't come with it. You gonna have to test out the EFI and Circuit Opening relays.
Aug 5, 2007 at 7:56 PM
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BATOSAI69
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so since it was rebuilt 3 times by the same place{before i was with the owner} it developed a huge oil leak on the drivers side front of the engine. so i'm going to rebuild it anyway. whats the feasibility of just ripping out the ECU and going with a carburetor intake and a Weber cutting out the airflow meter, injection, and EGR all together?
Aug 5, 2007 at 9:01 PM
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RASMATAZ
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Its a lot of work to do if I were you follow a 1987 model on its fuel/ignition system set up.

Aug 5, 2007 at 10:46 PM
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ASEMASTER6371
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Good afternoon,

The ECM is what pulses the injectors once it gets an RPM signal from the distributor. If there is no signal, it will not pulse or ground the wire that goes to the ECM.

You would need a scope ideally to check for a signal from the distributor. The fact you have spark tells me it is not that. I attached wiring diagrams for you.

You need to verify power at the ECM on the wires I attached. If there is then you need a noid light for the connector for the injector. Crank the engine and see if it flashes.

chances are you need an ECM.

Roy
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