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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 02-20-2008
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Need the Lead OUT!!

It drives like ****.. Ran sea foam. Changed spark plugs and wires. Changed oil. Flushed the coolant. Flushed the Tranny. Done a lot but it's like it hesitates on the throttle a little, It's slower and it's not bad but enough that I wanna trade it in.. The transmission shifts ****ty every now and then.. The only thing I haven't replaced is the fuel filter.. Ideas??
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Old 02-20-2008
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what about the air filter
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Old 02-20-2008
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A bad MAF sensor or vacuum leak can cause both of those problems.

Rich
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Old 02-20-2008
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Hmm, perhaps the cat. in your exhaust might be clogged up a tad? Would cause a nasty feel to the engine.. has it been sounding any different as well?

Those are the three spots I woudl start... MAF, Vacuum, and then cat.
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Old 02-20-2008
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I'm going to go with MAF as well. Try a bottle of Red Line SI-1 fuel system cleaner - I've found it a lot better than Sea Foam in the tank!
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Old 02-20-2008
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I have replaced the air filter.. How do I figure out if it's the cat?? MAF?? M?? Air Flow?? I'm gonna go clean the throttle body and the IAC vavle, now.
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Old 02-21-2008
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if your fuel filter is clogged up it might lag in getting enough fuel if your doing quick starts.
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Old 02-21-2008
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It was the MAF and I ended up cleaning the IAC and the throttle body and all the wonderful ****. Feels a lot better.
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