Can someone give me a quick how to on engine timing?
I have the 4.0HO i6 and it think it needs a timing... how should i go about this? Ive done timing before but want to do it right.
I heard/read something that i shouldnt start twisting the distrib cause of the PCM and what not. So kinda scared about that. What should i do to time my engine? I was going to loosen the distrib and twist it a little with a timing let set up to watch the mark... and set it 2* ahead. |
You can't set engine timing on any of the 4.0 or 2.5 Jeep engines. Its all done electronically by the ECU
You can set the static time if you have removed the dizzy and forgot to set #1 piston on TDC compression stroke and forgot to mark the rotor location on the dizzy housing before removal On the RENIX models you can get a high altitude CPS that will advance timing by a few degrees. Also, you can't twist the 4.0 dizzy, it has a mounting tab on it and it wouldn't make any difference any way, the ECU will re compensate for the relocation. |
Well hell it sounds like i have a miss fire.. running really ruff! What should i do ?
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plugs, wires, cap, rotor. If it's still doing it check your cam position sensor and crank position sensor, as well as your injectors.
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Check your plugs, wires, rotor button and distributor cab.
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Originally Posted by Donnie_K
(Post 1358237)
plugs, wires, cap, rotor. If it's still doing it check your cam position sensor and crank position sensor, as well as your injectors.
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lol, the cam position sensor is that plastic plate thing under need the rotor in the distributor, and the crank position sensor is mounted in the back of the engine near the bell housing. I'd honestly start with the tune up and maybe a good throttle body cleaning. Plugs, wires, cap and rotor.
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Originally Posted by 4x4cherokeexj
What do i exactly do to check these sensors and where are they? :stuart: |
Do a quick compression check too. If it was overheated a blown head gasket could cause it to run on 4 cylinders. It can blow just between two cylinders and not to a coolant port so you would not have any other evidence of a blown head gasket other than two cylinders not firing.
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Moved to OEM tech.
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Originally Posted by ClaytonXJ
(Post 1359036)
Do a quick compression check too. If it was overheated a blown head gasket could cause it to run on 4 cylinders. It can blow just between two cylinders and not to a coolant port so you would not have any other evidence of a blown head gasket other than two cylinders not firing.
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