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1996 won't move once it gets hot


 
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uwireme
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Joined: 04 Jul 2005

PostPosted: Mon Jul 04, 2005 7:09 am    Post subject: 1996 won't move once it gets hot Reply with quote

1996 Jeep 4.0 wouldn't start, replaced the crankshaft sensor-now it starts. Now when it gets HOT idles erratically. When you step on the throttle it bucks and kicks and we go no where. Replaced the throttle position sensor with no luck. Fuel filter replaced 4 months ago. please help

stuck in the driveway
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ThePhantum
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Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Mon Jul 04, 2005 5:15 pm    Post subject: Reply with quote

Stating the obvious here, but it's either fuel or spark. On the ignition side, my best guess would be the ignition control module. You can have autozone test the module for you (it's free). It could also be a bad distributor or a bad camshaft position sensor.

On the fuel side, put a gauge on the fuel rail and watch the pressure as the engine heats up. It should stay between 30 and 40psi. If the pressure drops, then you could have a bad fuel pressure regulator, a bad ballast resistor (causing the pump to stop pushing fuel) or the fuel pump itself is shot.
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