Misfires on cyl 2,4,6 wth am i missing!?!? - Dodge Nitro Forum
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post #1 of 7 (permalink) Old 01-07-2016, 06:59 AM Thread Starter
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Exclamation Misfires on cyl 2,4,6 wth am i missing!?!?

Good Morning! ok here is my issue
2011 nitro heat with 4.0L had code P0300 in system.
This is what i have done so far and still getting misfire counts on cyl 2,4,6 only.

Replaced spark plugs
Performed compression test 225psi all cylinders but number 2 which was 220psi.
Smoke test for intake leaks, small leak at the egr tube. replaced gasket and retested ok.
switched coils side to side
switched injections side to side
switched o2 sensors side to side
Tested exhaust backpressure.ok.under 1 psi
checked engine timing,spot on.
check vacuum readings and they are steady at 19 and responds and should during a snap throttle test and driving test.
my adaptions values
short term 1/1 2.9% long term 1/1 8.6%
short term 2/1 1.0% long term 2/1 -4.4%
Had ecm anad tcm updated at dealer
ran tank of techron thru truck also.
I think i covered everything so far i'm baffled as to the cause short of removing the cylinder head and having it checked for cracks
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post #2 of 7 (permalink) Old 01-07-2016, 08:48 AM
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Welcome trog623

Wow you have done your part and it should be corrected, right? Can't add much. Suppose you have reset the PCM by disconnecting the battery. Battery has been checked and is O.K. Fuel pump checked. Could the plug wires have become damaged? One member here suggested cam sensor. Sorry nothing else, not much help. When you figure it out a post from you would be most helpful to the next guy on what corrected you issue. Good Luck.

Universal P0300 Misfire Detected Code Video Some things to look at when a misfire detected code happens

How To Test Fuel Injectors - REAL EASY!!

Trouble shooting a misfire, Code P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 Published on Feb 16, 2014
Misfire Trouble Shooting: 30 to 60 minutes ($50 / $75 / $120)

If your car is running rough at idle or hesitating during acceleration, stalling at idle, there is a good chance that it is misfiring. Most of these car motors function on 100 year old basic principals of a combustion engine. They need the proper mix of AIR, FUEL, SPARK, COMPRESSION and TIMING to operate smoothly, in all of it's cylinders. This video will show and explain how to narrow down your possible problem.

Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
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post #3 of 7 (permalink) Old 01-07-2016, 09:27 AM Thread Starter
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Exclamation

fuel pressure was good also checked that too! 58psi if i remember correctly.
also did a hard reset by disconnecting the battery and jumped the positive and negative leads together for 10 min to make sure all capacitors were fully drained.

are these known to have issues internal with the heads that would cause the one side to flag misses?

whats controlling adaption on these im use to the air flow meters.
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post #4 of 7 (permalink) Old 01-07-2016, 09:43 AM
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Is that the original battery in your Nitro? They really only last about 3 years. If so put that on your to-do list. Not sure it would cause your issues however. Head replacement is not normal for a Nitro.

Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options
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post #5 of 7 (permalink) Old 01-08-2016, 05:52 PM
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If you remember, Rick, there was a post about left hand cylinder head cracking in 2011 3.5 V6 engines. Chrysler will cover under warranty.

John

Model: Nitro SXT 3.7L
Build date: Jan 07
Colour: Black
Mods: Projector Head Lamps, Bosch Platinum Plus spark plugs, Autozensations projector fog lamps with Landy chrome bezels. Custom undergrille, removed roof rails.
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post #6 of 7 (permalink) Old 01-08-2016, 07:47 PM
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Quote:
Originally Posted by jhnhopkins View Post
If you remember, Rick, there was a post about left hand cylinder head cracking in 2011 3.5 V6 engines. Chrysler will cover under warranty.
Chrysler Group will extend the warranty for consumers who bought certain 2011-13 vehicles with 3.6-liter V-6 Pentastar engines.


Thanks John

John you have a good memory and I remembered it too but did not find it at the time. The problem is that trog623 has a 4.0 engine not the 3.6-liter V-6 Pentastar engine. Do you remember any issues with a Nitro cylinder head? I did do some research "On-line" and remember a Nitro owner having heads replaced but it did not correct his issue.

Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options
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post #7 of 7 (permalink) Old 05-11-2017, 06:08 PM
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Did you ever solve the issue??
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