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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 06-12-2015
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Clogged Cat Converter

I have a 95 Ranger with a 4.0 5 speed. Can a clogged cat cause the truck to idle rough and run on 5 cylinders?
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Old 06-12-2015
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Hit the cat with a rubber mallet if it makes a noise its shot.Have you noticed any power loss or a weird smell?
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Old 06-13-2015
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Quote:
Originally Posted by ForderTJP View Post
I have a 95 Ranger with a 4.0 5 speed. Can a clogged cat cause the truck to idle rough and run on 5 cylinders?
sometimes , but more than likely you have a dead spark plug wire

i would recommend that you replace the spark plug wires as well as the ignition coil

ignition coils start to fail after 4 years
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Old 06-13-2015
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Clogged exhaust is noticed FIRST at highway speeds, a lack of power above a specific RPM as the back pressure builds up in the exhaust system.
It would idle fine.
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