Z stuttering on warm start

buddahson · 03-10-2011, 09:19 PM

Had multiple instances where the Z stuttered on startup today. It starts and then nearly dies before returning to a normal idle. I think the engine was warm in all instances. No error lights or other signs of trouble. First thought was dirty air filter. They were dirty, and I cleaned them up a little. Seemed to help at first but then the issue came back. Car runs ok after a minute.

The car is a 2009 and is stock. 11500 miles. Oil, coolant, gas and temp levels normal. Garage has been dusty the past few days which is why I lean toward air filter. Anyone have other ideas?

Thanks,
Matt

Q8y_drifter · 03-14-2011, 04:57 PM

Dirty throttle bodies possibly, since there's no CEL.

cfweber · 03-14-2011, 07:16 PM

If it were my Z

it would be at the dealer getting diagnosed right now

buddahson · 03-15-2011, 11:17 AM

Cleaned the filters again. So far no issues. If it returns I will get it to the dealer.

Red__Zed · 03-15-2011, 12:20 PM

I'd run it by the dealer. Might as well use the warranty.

spearfish25 · 03-15-2011, 12:39 PM

The stuttering idle has also been linked to the cam angle position sensor in other threads. Some people have had the sensors melt and needed replacement.

Z2nv · 03-15-2011, 04:48 PM

this exact same things happened to me before, And good luck getting the dealership to diagnose that lol. If it doesnt do it often, or they arnt able to mimic the problem.. theyre going to tell you to bring it back when the problem occurs again. First thing you do when diagnosing a car is verify problem/customer complaint.

03-10-2011, 09:19 PM	#1 (permalink)
buddahson Enthusiast Member Join Date: Jul 2009 Location: Boulder, CO Posts: 272 Drives: 09 370z, 07 R6 Rep Power: 15	Z stuttering on warm start Had multiple instances where the Z stuttered on startup today. It starts and then nearly dies before returning to a normal idle. I think the engine was warm in all instances. No error lights or other signs of trouble. First thought was dirty air filter. They were dirty, and I cleaned them up a little. Seemed to help at first but then the issue came back. Car runs ok after a minute. The car is a 2009 and is stock. 11500 miles. Oil, coolant, gas and temp levels normal. Garage has been dusty the past few days which is why I lean toward air filter. Anyone have other ideas? Thanks, Matt __________________ Thanks for the sig EazyD.

03-14-2011, 04:57 PM	#2 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 15	Dirty throttle bodies possibly, since there's no CEL. __________________ 08 G35 5AT Sedan \| Stillen CBE \| Invidia HFC \| Injen CAI \| Uprev Tune \| Akebono BBK \| Tanabe Coilovers \| Hotchkis Sway Bars \| GTSpec FSB \| Black Headlights & Grille \| Volk GT-F Wheels \| Hankook V12 Evo Tires

03-14-2011, 07:16 PM	#3 (permalink)
cfweber Enthusiast Member Join Date: Jun 2010 Location: Independence Posts: 388 Drives: 10 370Z BS 6 SP Rep Power: 14	warranty If it were my Z it would be at the dealer getting diagnosed right now

03-15-2011, 11:17 AM	#4 (permalink)
buddahson Enthusiast Member Join Date: Jul 2009 Location: Boulder, CO Posts: 272 Drives: 09 370z, 07 R6 Rep Power: 15	Cleaned the filters again. So far no issues. If it returns I will get it to the dealer. __________________ Thanks for the sig EazyD.

03-15-2011, 12:39 PM	#6 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	The stuttering idle has also been linked to the cam angle position sensor in other threads. Some people have had the sensors melt and needed replacement. __________________ 2013 Cadillac V-Wagon, RIP Z

03-15-2011, 12:20 PM	#5 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 119	I'd run it by the dealer. Might as well use the warranty.

03-15-2011, 04:48 PM	#7 (permalink)
Z2nv Base Member Join Date: Sep 2010 Location: Edmonton, Canada Posts: 65 Drives: 2010 370z Rep Power: 14	this exact same things happened to me before, And good luck getting the dealership to diagnose that lol. If it doesnt do it often, or they arnt able to mimic the problem.. theyre going to tell you to bring it back when the problem occurs again. First thing you do when diagnosing a car is verify problem/customer complaint. __________________ STILLEN G3-STILLEN EXHAUST NISMO HDRS COBB TUNE ADV1 deepkoncave 10.1.........2010 370z Sportpackage 6mt..........2004 MustangCobra SVT 495whp - Forsale..............2004 G35 sedan 6mt VIP status - sold.

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