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Discussion Starter #1
Car is new to us, got it off the lot and a few days later it started kicking the cel and CC, TC lights. They replaced the VV Solenoid and now its better but still was showing a p0303. They replaced and checked the coils and plugs. No more CEL but now randomly the car will hesitate and the CEL, TC lights will flash. A few sec later they will go off and the car will act normal for a random amount of time. Could be later that day or next day and Bam! Happens again. Codes don't stay so the dealer doesn't know what to do. I asked about them paying the subi dealer in the area for a diag on their end. Didn't seem to go so well lol. What can I do on my end to help their jack of all trades. They are covering all the work labor but so far issue is still persistent. I did check for fluid in the spark tubes, no oil or anything noticeable. Coil pack connecters are all tight.

This was also posted of at the beca forums.
 

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OBW H6 VDC, Tribeca, XT6
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1. why did they replace the VV solenoid - what codes or diagnostics did they do and which one - aren't there more than one?
2. Was it the same side as #3 cylinder?
3. miles?
4. how old are the spark plugs?
5. how did you check for fluid in the spark plug tube - did you pull the coil pack and check for oil?
 

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Discussion Starter #3
These are their words.
1. "Code was showing a misfire on 3 cylinders." But code that I seen was P0011
2. yes
3.179000
4.Not sure how recent but dealer says they are clean and the correct ones, IE NGK with the Iridium.
5.I myself examined that area around the coils and plugs. No residue or anything but dust, I would think if there was oil that had been wiped off, there would not have been dust. Dealer says when they examined and replaced the coils this last time that they were clean.

UPDATE> Tonight the CEL and all came back on to stay. Will check the code tomorrow. Its a weird feeling when it happens, car loses power and I almost coast, then everything is back and I'm fine.
 

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OBW H6 VDC, Tribeca, XT6
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Misfire, in a sense they're free and simple to do a preliminary diagnosis (even easier since it's not cylinder 5 or 6 which are no fun to get to.)

1. swap COP's (install cylinder 3 COP on cylinder 1 and 1 on 3) and see if the misfire moves with the COP - if so then the COP is faulty.

2. swap spark plugs and see if the misfire moves with the spark plug - if so the plug is faulty
(H6 plugs rarely fail and the dealer did presumably look at it so we'll assume this is unlikely).
*as you're doing steps 1 and 2 look for oil residue on the COP boot and spark plug itself.

3. swap fuel injectors and see if the misfire moves with the fuel injector.

It should be one of those things, I'd check those first.
 

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Lawn ornament XT
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Where abouts are the fuel injectors on these engines? I couldn't seem to locate them but i must have missed them.

They are somewhat visible from above. They are at the distal ends of the intake manifold runners, so follow them out to where they meet the heads.
 

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Discussion Starter #8
Update.

After 2 days of no issues code p0303 came back on during the first start of the day. Car always runs rough for the first start. But after a few min its fine. So new plug, swapped coil pack, swapped injector. I do have a obd2 BT reader and torqe but not sure what to monitor and or log.
 

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Discussion Starter #9
With an app I had I was able to get what I think is freeze frame data.
ff
Brand:
Model:
Year:
Displacement:
Comments:

*****
meta-info header:Error Codes
file version:1
type:5
time:1440539172245
name:Trouble Codes
codes:p0303,
codes_p:p0303,
codes_raw:7E80443010303;7E9024300;;
codes_p_raw:7E9024700;7E80447010303;;
*****
Error Codes
P0303
Cylinder 3 Misfire Detected
Ambient air temperature (AAT) 66 °F
Accelerator pedal position E (APPE) 13.72 %
PIDs supported [41 - 60] 01111110110100000000000000000000
Commanded throttle actuator (CTA) 0.0 %
Barometric pressure (BP) 0.9081934846989141 Atm
Short term fuel % trim Bank 1 (STFT1) -3.9 %
Relative throttle position (RTP) 5.88 %
Commanded evaporative purge (CEP) 0.0 %
Absolute load value (ALV) 37.64705882352941 %
Oxygen sensors present (OSP1) 00110011
Engine coolant temperature (ECT) 111 °F
Run time since engine start (RunTime) 0:00:02d s
Intake manifold absolute pressure (MAP) 0.49358341559723595 Atm
Vehicle speed (Speed) 0 MPH
Long term fuel % trim Bank 2 (LTFT2) 5.46 %
Long term fuel % trim Bank 1 (LTFT1) 4.68 %
Bank 1, Sensor 2: O2 voltage, Short term fuel trim (STFT122) [[email protected]
MAF air flow rate (MAF) 12.9 g/s
Absolute throttle position B (ATPB) 33.72 %
Calculated engine load value (EngineLoad) 54.9 %
Command equivalence ratio (CER) 0.99 N/A
Timing advance (TA) 2.0 °
Engine RPM (RPM) 1174 rpm
Short term fuel % trim Bank 2 (STFT2) -2.34 %
Throttle position (TP) 16.86 %
Control module voltage (CMV) 14.297 V
PIDs supported [21 - 40] 00000000000001100110000000000001
Bank 2, Sensor 2: O2 voltage, Short term fuel trim (STFT222) [[email protected]
Intake air temperature (IAT) 109 °F
Fuel system status (FSS) Openloop:insufficientenginetemperature
Evap. System Vapor Pressure (VP) 0.6416584402764067 Atm*E-03
OBD standards this vehicle conforms to (OBD) OBDandOBD-II
Accelerator pedal position D (APPD) 13.72 %
Fuel Level Input (FLI) 21.56 %
 
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