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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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  #1  
Old 06-24-2010
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running like crap

I drove my truck 3hrs to nj to work.I worked for 5 hrs came back out and now the truck bucks and misses while driving..It seems fine reving it up and the missing comes and goes but is real bad..I changed my plugs and wires a month ago and Im not getting a check engine light...

Ok well I just spend $150 on a fuel pump fuel filter and fuel pump screen and my motherf'n truck got worst..Wtf can this be. filter is on the right direction.

Im getting no cel lights..I even check it with a code reader anyways and nothing..

What else could it be..

I changed plugs and wires about a month ago.,

Last edited by shaved93; 06-24-2010 at 09:24 PM.
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  #2  
Old 06-25-2010
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Well it seemed to have cleared up.
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Old 06-25-2010
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Maybe you got a bad batch of gas or something? If that is even possible. Post back if it starts again.
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Old 06-25-2010
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See I thought that..But I put gas in it 3 times since I went to nj.
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Old 06-25-2010
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Another thing, if you haven't done it in a while, is cleaning your throttle body. It really doesnt take long to do and it will help. If you haven't done that yet, that is where I would start at next.
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Old 06-25-2010
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Another thing, if you haven't done it in a while, is cleaning your throttle body. It really doesnt take long to do and it will help. If you haven't done that yet, that is where I would start at next.
I def will..I cleaned the maf this mourning..I think that may have fixed it..The truck has a little over 170k..Thanks
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Old 06-27-2010
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Well I was driving again this mourning and it started doing it again..
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Old 06-27-2010
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you running a KandN, noticed this before that if the maf sensor gets something on it or starts going for a **** then it starts running weird, reving and missing all over the map, and never threw a code or a light. Somestimes the oil from the KandN causes maf miss reads
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Old 06-28-2010
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Nope still have paper filter..It was acting up yesterday and a little bit today.
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  #10  
Old 07-15-2010
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Its on and off..wth can this be.
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  #11  
Old 07-16-2010
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not sure, i havent really had any problem like this with mine yet. Sorry i cant help you more
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Old 07-19-2010
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if you can get ahold of a fuel pressure gauge, i would start there. you may have a plugged fuel filter. If you can get ahold of a scan tool to check the mass air flow, should be around 3-5g at idle, and at 2500 should be roughly 40-50g, and at wide open throttle should be about 90g+. hopefully that will give you a starting point.
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Old 07-19-2010
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I replaced pump and filter already..I got a check engine light today and was never more happy to see the light come on..Cylinder misfire on #4..What one is that?
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Old 07-19-2010
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front driver yo

Last edited by zak873; 07-19-2010 at 11:29 PM. Reason: doh
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Old 07-19-2010
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middle cylinder passenger side.. correct me if I'm wrong.
I cant plugs and wires like 2 months ago so im just going to replace that plug and wire.
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Old 07-19-2010
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Old 07-19-2010
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Thanks a million..
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Old 07-19-2010
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replace the plug and wire, if that doesnt help, look into the fuel injectors.. but I'd recommend looking into the coil pack before the fuel injectors.
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Old 07-19-2010
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every 4.0 OHV misfires on 4. ask anyone with a pre-01 ranger. It shouldn't run too bad though. just the occasional miss. seafoam?
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  #20  
Old 07-19-2010
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Injector would make sense.
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  #21  
Old 07-19-2010
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every 4.0 OHV misfires on 4. ask anyone with a pre-01 ranger. It shouldn't run too bad though. just the occasional miss. seafoam?
It is pretty bad when it does it..Cuts in and out alot.
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Old 07-19-2010
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It is pretty bad when it does it..Cuts in and out alot.
scrap the coil pack first, check the injectors first, coil pack second.
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  #23  
Old 07-20-2010
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if its missing on cylinder four, it is highly unlikely that is is a coil, cause it would missing on is companion cylinder #3. Def start with plugs and wires.
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