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post #1 of 4 (permalink) Old 01-11-2015, 02:28 AM Thread Starter
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Idle and cylinder 4 problem help please!

first time posting here but i really need help, ive bought an 02 ranger, 4L v6 and shortly after the check engine light came on with a cylinder #4 and 5 misfire and a really rough idle while stopped or at low rpm and higher speeds and rpm the truck seems to be good, so i thought may have been a vacuum leak or something to do with the fuel system, so i checked:

intake manifold put new gaskets in
vacuum leak test
injectors checked
new plugs
checked spark
checked compression
spark plug cables
coil pack and plugs
cleaned the iac
took the valve cover off everything seemed normal

any feedback or info would be greatly appreciated, i know i can't be the only person with this problem!
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post #2 of 4 (permalink) Old 01-11-2015, 06:14 AM
 
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I noticed that you had suspected the fuel system, did you check the pressure?

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post #3 of 4 (permalink) Old 01-11-2015, 11:26 AM Thread Starter
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Ya everything seemed to be normal , I'm so stumped as to what this could be ...
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post #4 of 4 (permalink) Old 01-11-2015, 01:50 PM
 
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usually on newer stuff the first thing to do is check for fault codes stored in the computer
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