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Old 01-11-2010, 03:21 PM   #1
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90 Wrangler won't start.

My 90 YJ 2.5L will not start. It does however start with starting fluid. Thought it was the injector so I replaced that.. still nothing. I then replaced the ECU thinking there was no signal being sent to the injector.. No start still. Its got a strong spark and appears to be getting fuel to the throttle body. Could it be that there is not enough fuel pressure??? ANYONE got any ideas???

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Old 01-11-2010, 03:56 PM   #2
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I had the same problem with my 93 2.5l. It was the crank position sensor. I had spark and it would crank over fine but wouldn't start. I changed the cps and haven't had anymore problems.

Jason

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93 yj wrangler, 2.5, 5spd, 10" stretch, spring over, 38" tsls, mt classics, dana 44 front and rear, locked, 5.13 gears, rear disk brakes, griffin aluminum radiator, custom aluminum fuel cell
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Old 01-15-2010, 08:41 PM   #3
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Turns out it wasn't getting enough fuel pressure. (hardly any at all) It needs 15 psi. I pulled the fuel pump out of the tank to discover it completely covered with sludge and build up. Gonna buy a new pump, possibly new tank if it doesn't clean up well. Shoulda trusted my gut instinct in the beginning.

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