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Can anyone diagnose this problem with my g37

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Old 04-09-2010, 09:13 AM
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demarco5
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Can anyone diagnose this problem with my g37

driving to work this morning and the car seems like its shaking like a message chair, then when i come to a stop (red light) then you can really tell how bad the car is shaking, almost to the point where i wanted to get out and shut it off....but i didnt.....2mins later the service engine light starts blinking and symptoms persist for 3 more mins. Then everything goes away, the light and the shaking go away. I tried to turn off car and start the engine back up and now it seems like it takes 1-2 more secs then it ever did to start the car back up.???????????????????

this is an 08 with 10k miles
Old 04-09-2010, 09:32 AM
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Blackjack
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Dealer time.
Old 04-09-2010, 09:37 AM
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demarco5
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yeah im getting it towed there now, guy said something must be misfiring
Old 04-09-2010, 09:45 AM
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Haji
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Funny, this exact thing happened to the G I test drove at Modern. They didn't know what was going on with it, but I never saw it again lol
Report back with what the exact diagnosis is, I'm really curious.
Old 04-09-2010, 10:56 AM
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SkyMG37x
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I had a somewhat similar issue with the exception that my Service Engine light came on solid and the ECU went into limp mode.

Sounds like something related to VVEL timing control went sideways which results in the rough idling and service engine, but it probably reset itself which is why the light went out. Nonetheless there should be a code stored for the service tech to pull.

My problem was apparently an Intake Timing Control Valve solenoid which adjusts VVEL intake timing. When that valve is not working properly the air/fuel/timing goes off which results in similar issues like you described. There's really no need to tow the car if you're close to the dealer but better to be safe.
Old 04-09-2010, 11:49 AM
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demarco5
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i towed b/c dealer is 40mins away and i didnt wanna take the chance hopefully its somethin like what you had
Old 04-09-2010, 02:07 PM
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csnpsu
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Prob a coil over issue
Old 04-09-2010, 02:10 PM
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da mayor
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bad gas could be an issue too
Old 04-09-2010, 02:46 PM
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demarco5
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lets hope its soemthing minor, just got there
Old 04-12-2010, 03:57 PM
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demarco5
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said there just starting to take a look at it now and its hard to figure out what it is because its not a common problem. so they have do do a process of elimination using their book with the codes in it, who the hell knows
Old 04-12-2010, 04:19 PM
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demarco5
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he called back and said too much mass airflow caused the problem which is a result of the air filters they replaced last year when i had the water damaged engine. he said the ones they got from infiniti werent as durable as some of the ones they have at the store, and hell road test it and make sure its good to go...

ugh
Old 04-12-2010, 04:50 PM
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TTZ2G
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ummm, I don't buy the air filter excuse. sounds like a new MAF (or at least test with one) to me.
Old 04-12-2010, 04:54 PM
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demarco5
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mass air flow sensor? i dunno he said something on the phone but he was tlaking too fast, said air flilters looked a little more worn then usual and hes saw this before, but i dont believe him either

but what am i supposed to do
Old 04-12-2010, 04:58 PM
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TTZ2G
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take it in the rump and keep bringing it back when this happens...

OR

find another dealer for a second opinion
Old 04-12-2010, 05:54 PM
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rehtea
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Originally Posted by demarco5
he called back and said too much mass airflow caused the problem which is a result of the air filters they replaced last year when i had the water damaged engine. he said the ones they got from infiniti werent as durable as some of the ones they have at the store, and hell road test it and make sure its good to go...

ugh
Was your car damaged by flood?


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