YJ 95 2.5 runs on 4 cylinders and then 3 after 3-6 miles of driving

Dano

Dano

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Nov 17, 2021
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Replaced Head,Cap,Rotar,Plugs, Wires, Distrubutor switch plate, and Injectors. She runs great for a litte while, then down one cylinder. I smell gas so i think one plug or wire may not be firing after it warms up?
 

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how was it running before you replaced all the part or why did you put all of those parts on to start with. you did not mention whether you time it. maybe a point on plug got bent when you installed.?
 
When it starts missing, shut off the engine and unplug one spark lead at a time and start the engine to determine which cylinder is off. You can swap wires or plugs to see if the problem follows a bad wire or plug.

You can also unplug an injector connection while it's running to see if it's an injector sticking.

Might be fuel contamination in the fuel rail.
 
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