klonking noise on start up.
06-05-2009, 12:52 AM
#31
Registered User
update
well, +2 for my G!!! met with Infiniti tech and BBB arbitrator today, and my G will be schedule in for a "last repair" on this 'klonking' issue within the next 30 days. Everything turned around, from the tech-line responding to noise that it was "acceptable" to the tech rep. saying they'll back their product and dig in to get this fix... He describe the problem best, it sounded like a "diesel engine"
my only concern is that they'll 'dig' too deep and my G is gonna be a guinnea pig for this problem
my only concern is that they'll 'dig' too deep and my G is gonna be a guinnea pig for this problem
Last edited by anh3; 06-05-2009 at 01:15 AM.
06-05-2009, 01:13 AM
#33
Registered User
just negotiated the agreement today, haven't send the car to the dealer yet. my next closest dealer is about 200 miles away, this one is 50, but that might be a good point.
06-05-2009, 01:14 AM
#34
i know it's tough for some owners to find a local dealer but if you're getting the noise still with the ester oil in, it might be some new parts needed into the head of your motor. just a slight adjusting.... i.e.... the vanos issues w/ the older BMW m3's
06-05-2009, 01:21 AM
#35
Registered User
I appreciate your responds, one thing I forgot to mention is that the Infiniti rep. said he'll personally be at the dealership when I bring my car for the fix, don't know if that will help in anyway with the issue... or he'll be there?! yeah this problem is very weird, only happens when the hot engine cool down significantly. my hypothesis is that either there are moving parts that are not being lubricated well enough, oil pump issue (oil not getting to all the needed part), or some other design flaw.
06-05-2009, 09:10 AM
#36
Registered Member
My 2 cents - based on the description this doensn't sound like a VVEL issue (warm engine, "diesel" sound/stumbling). It sounds more like the ECU is not properly managing the engine and if I was the tech I would first look at all the input sensor data (MAF, Engine Temp, Throttle Position, etc.) to see if they're reporting proper levels. For example, if the warm engine is somehow causing the MAF sensor to report an erroneous value the ECU may not be able to adjust the air/fuel mixture properly resulting in the stumbling you're seeing. But once you start driving the intake airflow could clear the condition. Just a thought, but these guys should have a detailed procedure to check out the engine's management system. They've probably been too lazy up until now. Good luck.
06-05-2009, 11:27 AM
#37
FWIW, the ECU also manages the VVEL. The ECU controls the "variable" part of the variable valve timing and lift.
06-05-2009, 11:49 AM
#38
Registered User
06-05-2009, 12:30 PM
#39
Registered Member
And my understanding of VVEL is the ECU changes valve timing based on throttle position to increase performance and responsiveness. That shouldn't be changing at startup.
11-14-2009, 12:23 PM
#43
Registered User
is possible
I know I am bringing this back from the dead but the noise is still there after the engine replacement. Is it possible that they didn't replaced the engine?! What's the likely hood?
11-16-2009, 07:47 PM
#44
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Agreed but that doesn't sound like valve chatter type sound to me. It sounds like improper combustion or ignition timing. Hope they find it.
And my understanding of VVEL is the ECU changes valve timing based on throttle position to increase performance and responsiveness. That shouldn't be changing at startup.
And my understanding of VVEL is the ECU changes valve timing based on throttle position to increase performance and responsiveness. That shouldn't be changing at startup.
Need to monitor all vitals at idle when the noise sounds and compare/superimpose sensor input/outputs onto a normal G37's. Seems like a timing issue mixed with wrong air/fuel mix.
11-17-2009, 10:18 PM
#45
Registered User
and the saga continues... this is about the 4th time I have brought the car to the dealer for this noise, respond, "normal!" Just like the respond that was given prior to a BBB arbitration in which Infiniti decidedly replaced my engine at 6k miles. sad thing is dealer is 50 miles away, I just drove there again tonight just to show someone the noise b/c it was listed on the invoice/receipt as "cannot duplicate." wow! is all I can say.