Question about 2002 Ford Ranger Regular Cab

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2003 ranger 3.0 po306 #6 hole misfire. did all the major diagnose comp,ign coil checked good, wires great, injector pulse good ,no vac leaks,no other codes triggerd, so i started thinking about the timing systems and triggers . all in great shape. ecept for one curiouse thing i work in auto parts so i orderd a balancer to look at the position of the crank sprocket. it seems it has a intentional cog missing in the sprocket. but what i noticed is that it is positioned at btc on my vehical and dtc on the new one, this is probably the problem could somone tell why it wpoldnt be?

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The missing tooth will be of no consequence as the rest ot the teeth in contact with the chain will always be correct
code p 0306 refers to cylinder 6 misfire detected ====causes ---engine mechanical fault ( could be a loose valve seat insert)---wiring---ignition/ fuel system---injector (blocked tip position it somewhere else and see if the fault moves to the new position)--- ECT/MAF sensor ---ECM
a timing chain problem will not show as a particular cylinder as it drives for all cylinders

Posted on Apr 23, 2017


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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: misfire

Check your cam. position sensor

Posted on Jul 25, 2009

  • 79 Answers

SOURCE: ck.eng. light blinking, running zone

Sensors. Start checking the related sensors to your trouble codes. Most likely on of the primary sensors. Oxygen, Intake, Exhaust.

Posted on Jan 18, 2010

  • 4803 Answers

SOURCE: vehicle came in for check

A misfire at idle that smooths out at cruise is ALMOST ALWAYS caused by a vacuum leak. Take a hard look at your fuel trims at idle. If the Bank 2 Long Term Fuel Trim is more than + a couple points higher than the Bank 1 trim, your problem is most likely a vacuum leak. If the Fuel Trims even-out while holding the engine at 2000 RPM for about 20 seconds, then a vacuum leak is DEFINITELY your problem. I would suspect a leaking lower intake gasket leak because an upper plenum leak will normally affect all cylinders.

Posted on Jan 30, 2011

  • 844 Answers

SOURCE: replaced coils, plugs, wires, crank

check intake gasket for leak.

Posted on Feb 03, 2011

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