Question about 2002 Ford Mustang

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2002 ford ranger 4 cyl exhaust backfires after decelerating. Engine runs smooth at times when cool and raining engine runs ruff.

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Check Oxygen sensor and associated wires. if you have access to a scan tool watch the sensor signal. it should resemble a smooth wave at idle with engine warm, if its anything else you need a new sensor.

Posted on Oct 03, 2009

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Posted on Jan 02, 2017

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My 2003 ranger 2.3 is idoling rough and sounds like its backfiring in side the engine seems to run fine when i accelerate


Could be that your cat is clogged up,the way to check is to remove and look in both ends,mine clogged up and caused my head gasket to blow between cylinder 3 and 4 on my 85 Nissan 720,part of the inside came apart and was blocking the air flow,causing my exhaust plugs to blister.

Feb 19, 2015 | 2003 Ford Ranger Regular Cab

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Running rough-1987 Ford Ranger 2.3 L 4 cyl. Had been running very smoothly until 2 weeks ago when it began backfiring and running rough, especially at low speeds, without my having made any adjustmen


If your car has a mas air flow sensor (usualy located right aroung air filter or in air passage after the air filter) check and clean the sensor. This looks like a small spring on the end of 2 wires. BE CAREFUL not to damage the sensor. I have seen where the sensor gets dirty over time and this can cause a rough idle.

Jul 11, 2012 | Cars & Trucks

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Runs ruff at idle are there 8 sparks plugs on this 4 Cyl?? Thanks


If there are plug wires going to both sides of the engine than yeas there are eight plugs.

Dec 08, 2010 | 1995 Ford Ranger Supercab

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1985 ford ranger runs good for a couple of days


Is it carburated? Rebuild it. Backfire is fuel leaving engine without burning popping in exhaust system. Bad valves?

Mar 06, 2010 | 1985 Ford Ranger

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