1999 Ford Explorer

1999 FORD EXPLORER
150,000 MILES • 6 CYL • 4WD • AUTOMATIC
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LEGULEYO3
  • MEMBER
  • 1 POST
troubleshooting P0304 Cylinder misfire detected-cylinder number 4. the powertrain control module monitors the crankshaft speed and has detected a misfire condition.
Sep 20, 2008 at 11:49 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
switch the plug and wire with another cylinder and clear code, does problem move to the cylinder you switched the plug and wire with? if not check for spark on cylinder #4.

if ignition is all good next step would be to check the fuel injector for pulse on that cylinder, do this by attatching a noid light and cranking the vehicle.
Sep 20, 2008 at 2:35 PM
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