Misfire all cyl after DE
#33
Rennlist Member
Thread Starter
plugs were changed at 22k I found out by calling the last dealer that serviced the car. It has been more than 20k miles with 10k running a higher boost tune.
sounds good, I will put the bumper back on and run it without the rear bumperettes to save weight during the test drive. it will be getting a new fuel filter as well.
sounds good, I will put the bumper back on and run it without the rear bumperettes to save weight during the test drive. it will be getting a new fuel filter as well.
#34
Rennlist Member
Thread Starter
#35
Rennlist Member
Thread Starter
Got it done last night. Car drives wonderful and seems even smoother than I recall!
Looking forward to taking it to Keeneland Concours tomorrow !
I also replaced the coils based on everyones advice. the old ones looked great but were 996 part numbers so I upgraded everything while I was in there.
Looking forward to taking it to Keeneland Concours tomorrow !
I also replaced the coils based on everyones advice. the old ones looked great but were 996 part numbers so I upgraded everything while I was in there.
#36
RL Community Team
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#37
Race Director
#38
RL Community Team
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#39
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Good deal! Have fun at the concours!
Mark/Pelican Parts
Mark/Pelican Parts
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#41
Race Director
Let me elaborate.
First I've never had to replace these in my Turbo. When will I? When they signal they need to be replaced with the appropriate error codes or the engine exhibits some behavior that is clearly tied to these sensors needing replacement. I'm not sure what that behavior would be. I do not think it would be misfires but I might be wrong.
Second, now even with no error codes signaling the sensors are going bad or have gone bad some advise replacing these after so many miles.
If you subscribe to the replace the sensors after so many miles line of thinking I would think you would replace all 4 sensors at the same time.
#42
Race Director
Misfires at all 6 cylinders?
Have you any data logging going on before/during and the misfires? I wonder what the short term fuel trims, timing advance, and MAP readings are?
Kind of a long shot but is the fuel filter reasonably new? This was mentioned before and I do not know if there was any followup.
Anyhow, I think you had better do more than just look at the intake system for a boost leak. You need or you need to have someone do a real test for intake leaks.
Also, you might consider having the engine checked for proper operation of the VarioCam Plus system. Not the valve timing portion but the low/high lift portion.
IIRC this involves a road test with a tech driving and one operating the diagnostics computer observing O2 sensor readings.
Have you any data logging going on before/during and the misfires? I wonder what the short term fuel trims, timing advance, and MAP readings are?
Kind of a long shot but is the fuel filter reasonably new? This was mentioned before and I do not know if there was any followup.
Anyhow, I think you had better do more than just look at the intake system for a boost leak. You need or you need to have someone do a real test for intake leaks.
Also, you might consider having the engine checked for proper operation of the VarioCam Plus system. Not the valve timing portion but the low/high lift portion.
IIRC this involves a road test with a tech driving and one operating the diagnostics computer observing O2 sensor readings.
#43
RL Community Team
Rennlist Member
Rennlist Member
That is a kick in teeth. Sorry.
I think Macster is correct you might want to consider professional help. It might be something very small but you may need full diagnostic gear to track it down.
It sounds like some sort of electrical problem, as in the ECU is not getting proper readings from a sensor or an electrical unit has failed and is not responding to the commands from the ECU. There are a ton of electrically controlled units on these cars.
I think Macster is correct you might want to consider professional help. It might be something very small but you may need full diagnostic gear to track it down.
It sounds like some sort of electrical problem, as in the ECU is not getting proper readings from a sensor or an electrical unit has failed and is not responding to the commands from the ECU. There are a ton of electrically controlled units on these cars.
#45
Rennlist Member
Thread Starter
New fuel filter installed this morning. CEL with misfire after 10 min of driving. I have not checked the code but I am guessing the misfire is on 1-3