Cylinder 3 Misfire...?? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 06-10-2009
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Cylinder 3 Misfire...??

So I took the truck up to Autozone and they ran it on their diagnosis thing and came back with a " Cylinder 3 Misfire"

I have read that it could be spark plugs wires or injectors...

What my truck is doing is when I press the gas it sputters (for lack of better words) and loses power ... not completely but just lose of acceleration

Any idea what this could be?

Has this happened to anyone else?
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Old 06-10-2009
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check your plugs and wires then clean out your maf sensor. if problem is still there do a leak test on all vac lines, upper and lower intake manifolds with a can or carb or throttle body cleaner. if engine revs youve found your leak. good luck.
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Old 06-11-2009
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Same thing happens to me! Cylinder 3 misfire. Dealership i work at said i need a new coil pack and plugs and wires...
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Old 06-13-2009
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the EXACT same thing happened to me. it read cylinder 3 misfire, I changed the plugs and wires and that did not help (it was the first time i changed them and my mileage was about 90,000). my truck would sputter and run terrible for a week and then another week goes by and its perfect and then it would get bad again

I think it was bad gas, water in my tank. i had numerous mechanics check it out and because of the inconsistency of the sputtering, they thought it was bad gas. I went to buy some gas tank water remover from advanced (use 1 per tank) and after adding one to every tank for the next 5-6 tanks the problem had finally gone away, give it a try, good luck and let us know.

good luck

Last edited by black_edge4628; 06-13-2009 at 01:24 PM.
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Old 06-13-2009
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I changed my plugs and wires the other day due to the same thing, but mine was cyl 4. Time for new plugs a wires more then likely. How many miles? If its over 80k thats probably it. 2/6 of my plugs were completely toast and out of the 4 only 1 was decent still.
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Old 06-13-2009
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Well my problem is whoever had my truck at 100,000 miles didn't change the plugs and wires. So 160,000 with original plugs and wires, I'm pretty sure that's my problem. I use the fuel additives every once and a while and it still seems to do it...
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Old 06-13-2009
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if you are going to try and get the water out you need to do it practically every fill up until its gone it took me about 5-6 full tanks before it finally all went away. Dont just get fuel additives and use them whenever you feel like it, you need to get gas line antifreeze/ water remover like this Heet 28201 Antifreeze/Water Remover ,thats what i used. it was not a fast fix i could not really tell until the third tank or so but finally it all went away. I would buy like 3 or 4 at a time and just keep them in my truck so i could always use them consecutively.
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Old 10-11-2017
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PO303 and PO316

2005 Ranger 3.0

My check engine light comes on if I let it idle with the A/C on. PO303 and PO316
I replaced plug wires, plugs, coil pack, #3 injector, fuel filter and pump unit and checked injector wiring with noid lights, I also bought the kit to clean MAF sensor and throttle body.
I really thought the pump replacement had fixed it because it starts easier but I drove it 30 miles after replacing the fuel pump and filter and stopped and let it idle with the A/C on and the check engine light came on. It runs great on the highway but it has a somewhat rough idle.
What do I replace now? O2 sensors??
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