2002 Dodge Ram 5.9 Misfire!

**(FIXED)** Having a cylinder 6 misfire code (PO306) Detected. Runs Rough, Idles Rough, Changed Spark Plugs, Wires, Cap, Roder, and even a Fuel Injector. But Still nothing.. Need some advice.. was thinking Bad Gas?

Category:

Autos & Vehicles

Tags:

• Idles Rough
• Changed Park Plugs
• Wires
• Cap
• Roder

[collins22dodge]

i have the same problem too. missfire on number 3. i have changed plugs, wires, cap and rotor and also my injector. i have researched some things on the net and i think my ignition coil isnt running at its peak and causing the missfire. you might wana check urs also.

[dodgedrummer]

@collins22dodge it turned out to be a bad Spark plug

[88GTi]

Right....Start with basics...First thing check compression.

If that's ok you have no worries!

If compressions bad then you may have a burn't valve or other problems as you already know.

There's no smoke so the head gasket and rings hopefully seem ok.

If the compressions good then change the plug and wire again...Just coz they're new doesn't automatically mean they're good!!!

You'll fix it...Best of luck!!!

[dodgedrummer]

@88GTi thanks for the help!

[AOO08DOYOUHEAR]

Start it and pull the no. 6 plug wire and see if it changes the way it runs at all. If it runs rougher no. 6 was firing if it doesn't change cyl 6 is your problem. If you have bad gas or a bad fuel pump it would be running rough on all cylinders not just missing on one. Since you changed your plugs cap rotor and injector if it is a cylinder 6 misfire it could be low compression from valves or rings. That's what happens with Chryslers, imo. I try to keep my opinions to myself though haha

[dodgedrummer]

@AOO08DOYOUHEAR thanks fopr the Help!

[MusiikN0w]

hmm... my 98 with the 360 runs the same way but it has no misfire.. we hooked a mac tools code checker up to it and every cyclinder runs perfect.. it only rough idles for a few minutes and it go's away.. any ideas anybody?

[Donmega884]

So you bought a new spark plug and it was faulty?

[papa6292]

Dude call my phone I have ur answer 1 585 474 8658

[okie294life]

awesome this happened with me and one of my buddies. He was getting ready to throw away a lawn mower, which was only about a year old because the plug was bad and it quit running. He replaced the plug and was sure that the motor was dead. It was a dead new plug...yeah. They aren't always 100%

[Ladueboy1]

If the plug and wire for the cylinder is good....and you have changed Dist cap and rotor..its time to check some things. 1) injector clogged or fuel rail dirty 2) Intake gasket sag near that cylinder 3) Compression check **Take the oil cap off the valve cover and see if the RPM changes or if its blowing out like a vacuum. **Remove the vacuum to the brake booster and check there for vacuum...should be 19 **and double check spark plug wire routing so your not backfeeding voltage somewhere

[phillips5260]

PICK UP COIL!!!!! Like points under distributor cap.

[luchito1983an]

i will tell you the problem, IS AN AMERICAN CAR, THATS THE PROBLEM.......

[racerjsf]

yea dodge does have some pisspoor ideas when it comes to there vehicles...i would know i have three including a qc sport 4.7 ram...nice vehicles hardworking but a bitch to maintain...

[MrCheez1]

i would say check the coil i used to have chevy blazer that did the same thing but chevy is known to have distributor problems. anyways back to the dodge i would say maybe your coil is goin and if thats not it then its possible maybe the distributor is goin out on it.