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Old 08-22-2009, 05:10 PM   #1
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Join Date: Aug 2009
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Help, Trouble Shooting.

2002 TJ
Inline 6
4.0 Liter

Rebuilt engine is put back together, however, it won't start.

What I know:
1. When I turn the Key the starter works and the fan and belt is turning.
2. There is no sputtering or coughing of the engine.
3. When I hook up a scan tool I get no codes.
4. The Check Engine light remains on.
5. The fuel line has pressure. I loosen the quick connect and gas spits out.
6. TDC is set.
7. Camshaft Position Sensor is set. (assuming it was done correctly)

Questions:
1. How can I tell if the Coil Ignition (Pack) is working and I'm actually getting a spark?
2. How can I tell if the Fuel Injector's are working and sending the fuel in correctly?
3. Any other thoughts?

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Old 08-22-2009, 05:34 PM   #2
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i would start with the simple stuff. first get a can of starter fluid and spray some in the intake and try to start it. if that doesnt work take the coil pack off and stick a philips screw driver in one of the coil pack holes that would normally line up with a spark plug and hold the screw driver close to something metal and have someone turn the key for a few seconds. if you get sparks then its working fine. after those its time to check timing again and make sure all the wires are hooked up and are tight.

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Old 08-22-2009, 06:06 PM   #3
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I tried spraying Exhaust Manifold cleaner into the throttle body and nothing different happened.

I have not tried testing the Coil Pac. I will try that next to make sure I am getting a spark.

Just for SnG, lets say I don't get a spark. What do you recommend?
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Old 08-22-2009, 09:16 PM   #4
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if no spark make sure theres power going to the coil pack. if no power then start checking electrical connections and make sure no wires got cut dropping the motor back in. if there is spark then its back to checking timing.
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Old 08-23-2009, 02:04 AM   #5
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For SnG check your ecm fuses and use a test light to make sure there is power there. (on both siddes of the fuse) Simple and quick.
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