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#1
12-05-2007, 02:55 PM
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89 Ranger runs rough or misfires
89 4 cyl. EFI with 8 plugs, 180k starts and runs well at idle but runs rough or misfires under acceleration or going up hills. I suspect plug wires but can't find one leaking, not even at night.
Also where is the PCV valve on these models, I can't find it.......... Thanks Footnote: I pulled 3 plugs at random and they all had a nice frosty white apperance, correct gap and no gunk on them. Now I am second guessing the plugwire need ??? Last edited by kevin23; 12-05-2007 at 04:08 PM. 
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#2
12-06-2007, 02:07 PM
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Re: 89 Ranger runs rough or misfires
If someone was under your hood before this happend I'd make sure your firing order is right and then I would go for new plug wires poss. new plugs because sometimes even good looking ones could be bad.
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1996 Explorer XLT 4X4 Auto. 4.0 OHV BWM to Fulltime and auto 4X4 1999 Malibu. 2.4L DOHC Auto 2000 Explorer XLT 4X4 Auto 4.0 SOHC
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#3
12-09-2007, 11:13 PM
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Re: 89 Ranger runs rough or misfires
Solution: New plugs and wires has this old Ranger purring like a kitten. The plugs were still OK but since the wires are such a bugger to put on, (the drivers side) I put everything in new. I had two of the eight wires that were obviously bad.
Still haven't found the elusive PCV valve...........
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