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Old 07-15-2018, 09:16 AM
Texas92 Texas92 is offline
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Default 1992 2.3 questions

I have a 1992 2.3 5 spd that will crank but will not start. It was possible to push start it so it was taken to Pep Boy's and they said it was the ECU. Not real sure if I trust this particular Pep Boy's. When picked it up from them with no work being done it would no longer push start and I have noticed there are some plugs under hood that are not connected. Plugs are on the passenger side by the main power fuse box but I can't see anything they could plug into. Any suggestions? Would love to find a full under hood wiring diagram.
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Old 07-16-2018, 04:53 AM
tomw0 tomw0 is offline
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Default Re: 1992 2.3 questions

If you can push start, then the computer must work... or the ignition would not fire.

If you have a TFI, Thick Film Ignition, module, manual transmission vehicles have a 'push start' mode, that will operate the module w/o computer assistance. Well, for 92 models, I am not sure, but the older ones did have that. Key to ON, get rolling, pop into 4th and dance on the clutch to get running.
The two plugs that I see, up close, are the ones used to pull any codes from the computer. The larger needs to be grounded and mumble, the smaller, umh, well memory is not that great, but if you get an EEC-IV reader, they both plug in. You can retrieve the codes using a jumper wire and a VOM. Instructions on the web, I do not have them memorized.
In my truck, both plugs are kept hidden under a plastic panel. They are generally NOT connected to anything during normal use.
I do not think you needed a computer, but, eh, I am not there. Perhaps their 'tech' did not know how to work with something that old that required knowledge beyond 'plug this into that, watch the screen'. The EEC-IV system produces 'serial' pulses that show on a VOM, or blink a light/beep on a reader device. You have to interpret the pulses, count them, and mentally calculate the 'space' between pulses to determine when they start/end.
tom
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