Quote:
Originally Posted by PitbullRescuer
Most auto parts stores will scan it for free for you. It'll help yo narrow down which cylinder is misfiring. From there you'll have to diagnose why. Off the top of my head, I'd check:
Spark Plugs
Spark Plug Wires
Check Compression while the spark plugs are pulled
If those 3 all check out okay, it's most likely a bad injector.
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Good list, add:
If a single cyl misfire, or pair on a single coil (1-4, 2-5,3-6), then swap that coil with another. If misfire moves, bad coil.
If plugs are old, I'd start with new plugs, and look carefully at the ones you pull out. A wet or fouled one, or one different from the others, is always a clue.
Then go to injector.
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'97 HiLux SW4 5spd 4WD(Japan model bought in Brazil assembled in Argentina, very close to a 3.0 4Runner/Surf)
'71 FordWillys Jeep CJ5 (with straight six Ford Maverick 3.0 liter engine--lives in the mountains north of Sao Paulo Brazil)
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