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2001 Jeep Cherokee CODE PO306

Tiny
RFITZ
  • MEMBER
  • 2001 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 70,775 MILES
I SCANNED MY CHECK ENGINE LIGHT, CODE COMES UP PO306 #6 CYLINDER MISS FIRE. I REPLACED MY COIL RAIL. THIS DID NOT SLOVE THE PROBLEM.I CHECKED FOR PULSE SIGNAL AT THE INJECTER. IT HAS IT. I HAVE 150PSI COMPRESSION IS MY ECU BAD. WHAT ELSE COULD POSSIBLY CAUSE MY MISS FIRE PROBLEM.
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Monday, January 19th, 2009 AT 5:25 PM

2 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Did u replace the spark plug
and if not you should

also check if the new coil working (firing )
if not check wiring and connector

ohm the injector
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Monday, January 19th, 2009 AT 5:32 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Possible causes for this code are: defective Camshaft Position sensor, deftective Crankshaft Postion sensor, improper valve timing, vacuum leak, defective ignition system, fuel contamination, improper fuel pressure or capacity, spark plugs, accesory drive belt, or defective fuel pump.

Did you check your spark plugs to ensure #6 is receiving proper spark and is not fouled?
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Monday, January 19th, 2009 AT 5:32 PM

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