Replacing 2.6L 4cyl. engine in a 94 Rodeo. We have dash lights, it turns over but doesn't start. There is "spark". Also, in wiring harness we have black/red wires (2) with juice, but don't know where they connect up to, there were 2 ground wires too -- wiring diagrams note that they are grounded but to where? (This is a rebuilt engine shipped from WI to AZ) We tested the wiring, fuses, fuse, etc with meters but can't find the problem. Suggestions? I would really like to get my car running again! Thanks!
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Re: Replacing 94 Rodeo Engine--
Could be a failed crimp on a solder-less connector. Take it in to a
high end radio installer and explain it to them like you did here. If
your alarm is still functioning normally then its just a small wire off
the LED leads that's not completing a circuit.
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If the check engine light does not light up on the dash when you turn on the ignition, at those times when your jeep doesn't want to start, then your main jeep ecm is in need of repair. The fuel pump relay will get energized only after that check engine light comes on. It's a known problem, especially with the first and second year production Grand Cherokees, 93 and 94.
an engine could run for 250k to 300k if you keep the oil and coolant changed regularly a rule of thumb is new fluids in an engine is always better than an old fluid. keeping spark plugs and fuel filter change and it helps keep carbon out of the top end.
This is straight from Haynes Repair Manual for 1989-1997 Isuzu Amigo/Rodeo/Honda Passport (book # 47017:
The 12 pin Assembly Line Data Link (ALDAL) terminal is located under the dash on the driver's side on 3.1L engines. To retrieve the trouble codes, connect a jumper wire to terminals A and B. It may be covered with a plastic cover. They suggest using a paper clip to jumper the two terminals-then turn ignition switch to ON position (NOT ENGINE START). Check engine light on dash will flash-one flash-a pause-then two short flashes-indicating code 12-diagnostic mode. After self checking-if there are any trouble codes-the light will flash proper codes using mentioned method.Note the flash code then call a shop with your info for what ails your Rodeo.
check for a small vacuum leak speciallythe lines going to the throtle have someone look at it while you seat onthe car , idle ,FOOT ON THE BRAKE ! a way to test for leaks if to spray a lil wd40 around the lines an listen if the idle gets better or worst, sometimes the reason the engine runs to rough or lean are vacumm lines that are slightly broken.