My 2002 grand vitara... keeps showing up with a cyl 6 misfire...replaced the plugs.. injectors and cop... still getting same...someone told me the pcm might need replaced??

P0302, see I now it, but is it only 1? DTC error?
2 engines , or where? and up to 5 world wide, NO VIN
Engines, Mitsu. no clue told.


V6 2.7L? (so says dodge.com USA> go this?
2.4 L EDZ I4 4G64 I4 DOHC and SOHC
2.4 L EDV/EDT turbo I4 (Mexico)
2.7 L EER V6 ) i GUESS THIS IF Usa CAR. has 6 COPS
Coup?:
2.4 L 4G64 I4
3.0 L 6G72 V6


my best guess USA is VIN K engine, no vin told so engine is UNKNOWN,

it means, this, only.
Low combustion on #2 cylinder, (spark,fuel injection or compression bad)#2
#1 is on crank pulley end. #4 is at transmission I4, F1234R
rear means tranny end. oK?
v6
all V engines 99% #1 is the bank V that is most forward cyl. of all.
to the crank pulley's
2nd is always 2nd in firing order, always,and PCM dictates it.

2.7l v6 24v ffv . dohc mpi engine.
firing order, 2.7L 1-2-3-4-5-6 even odd ;odd banks.




causes (v6 cops)
1: spark plug bad #2
2: spark coil bad, COP 2 dead? or weak or boot bad.
3: oil flooded inside the spark plug well, shorting all above out.
4: injector bad #2 (omg PCM, nah) swap 2 top find it;
5: compression fails #2
only 1 code told so answer is 100% based on 1 code only 302
6: rare bad cam lobe.
7: rare cracks in head , antifreeze leaks to #2 combustion chamber.
8: oil leaks to #2 via all classic ways.







3.0L v6


2.7L


2.7L V6 order
1-2-3-4-5-6

check for a crack or carbon track in the distributor cap for no 3 plug lead
It could be a wiring or harness connection for no 3 injector or a problem ECM control for no 3 injector ( check for moisture in the connections and or bad pin conditions

2000GV
MISFIRE, how did you prove rich, caused????????
if that is true, it can be caused by:

1. spark plug bad. (no spark causes, wet tips)
2. too high fuel pressure.
3. PCM stuck in failsafe (limphome) mode, scan it yet?
4. got DTC errors??? scan it?
5. misfiring when? hot , cold engine or both.?
6. only idling , cruising up hills? or all time?
7. leaking injectors?
8. clogged injectors.?
9. ECT stuck cold all the time (scan it is it 180F or more?)
10. and more. cant go closer lacking all EVIDENCE.

H25 engine,
ever do the 60k mile interval tune up>???
(spark plugs and cop boots, just did my H25) filters>?
here are the tricks to get out the boots and spark plugs.

http://www.fixkick.com/IGN_timing/tune-ups.html#H25

p0306?
misfire means, low combustion energy on #6

1. bad spark,
2. bad injection,
3. bad compression

there are tests for each one.

i always check compression first. that why i dont spend a fortune
guessing. 30min.,labor , done wide open throttle, 150psi min.

i also heck the fuel pressure doing the SOP leak down test. (fSm)
then the injector balance test at same time.
finds leaking injector and clogged.
got cops?
you could have swapped coil packs COPs to see if that cured mifire.
swap any other with #6
if problem follows the coil pack COPS, then its bad.
my v6 had a 3 coil pack and cant swap just one coil. all 3 or none.

the misfire is real. you can feel it and the PCM measures it.

Try moving the coils to see if the lack of spark moves cylinders. The cam sensor and PCM aren't going to affect single cylinders in most cases. If you decide that you have bad coils, make sure you buy good quality coils as COP ( coil over plug ) coils have a lot of components that can make them fail, particularly in the boot area. Make sure you get some dielectric grease for the inside of the boots as well so that the next time you need to service the plugs, the boots will slide off easily ( silicon paste works as well ). Airtex/Wells is a popular COP to replace these with and will run around $60/COP.

THE PCM driver the COPS direct.
2.0L engine right> always post engine type. displacement.
the 2005 has no fire wall mounted ignitor, like older suz.
the ECU is direct drive to COPs.
in a real shop we check the input to the COP if its bad , the ecu or the wires from ECU to COP are bad.
there are only 3 parts. here. not counting the spark plug
ECU/PCM , wires. and COP.
only using a scope can you tell if the pulses to the coil are present.
they are fast pulse on the order of 3/1000th of a second.

Do you get sparks on each spark plug boot when you crank it up?

check compression on each cylinder, could also be a fuel injector or pcm issue

P0301 misfire #1 cylinder you are more than likey face with a COP(coil on plug) failure check the connection on #1 COP and inspect the harness if good replace COP#1

------>>>FRONT>>>>of Van >>>>

______________________________
#5 cyl #6 cyl

#3 cyl #4 cyl

#1 cyl #2 cyl
______________________________
_________________
I COIL BLOCK I
I I
I #3 #1 #5 I
I I
I I Firing Order Is
I I 1 2 3 4 5 6
I #6 #4 #2 I
I _______________I_

the Wires Go Accordingly to prospective Terminals, So Sorry Unable to Send Pics through FixYa, A Formating Problem Exists
and they show on my end but not on your end this is TRUE and CORRECT To The BOOK other than the Lines from Coil to Spark Plug ENDS at CYLINDERS. Please dont Forget to RATE Me
Thank You And Happy Motoring!!