Some problems in my Z

Kaiser370z · 10-06-2011, 08:12 PM

Hi guys
Without any introductions, I will tell you the story
Today When I started my Z, it sound was louder than usual
It almost sounded like I'm installed an exhaust but I'm not
Other than this, when I was in my way to my work I noticed somethings
The shifting should be soft when I am driving on D, but today there's something wrong
I can feel it when my car shifting
It feels like something pushing my car from behind every time the car shifts
Also I was trying to stop at the red light and when I reached 20 mph, my RPM suddenly went down and came up again
WTF !!!
What's happened to my lovely Z ??

BTW my car is 7AT and it's milage is 64k miles

MattP725 · 10-06-2011, 08:38 PM

Any codes? Sounds like your throttle may be off but there are plenty of other things it could be. I'd start with the easy stuff like checking your AT fluid, a code scanner, checking for loose wires/harnesses.

I would also clean the mass airflow sensors... I had a similiar issue in a Mazda when my MAF was dirty. It would stall or near stall and buck sometimes.

MattP725 · 10-06-2011, 08:39 PM

Also being in Saudi Arabia, have you checked your filters? Again I'd clean the MAF because the climate may be impacting the car.

Kaiser370z · 10-06-2011, 10:22 PM

Mattp725
I will clean my two MAF's today and inform you if anything happened
I have an appointment in the stealership ops I mean dealership this Sunday to check the tranny fluid

What about torque converter ?? Is there any possibility that the problem could be from the torque converter ??
I am afraid that my gearbox is damaged

MattP725 · 10-06-2011, 10:43 PM

I'm not very knowledgeable with torque converters but I would think that if you were in park it shouldn't idle higher if it is a damaged torque converter (but I could be wrong).

harry370z · 10-07-2011, 03:53 AM

Check your engine oil levels!

semtex · 10-07-2011, 10:39 AM

I'd also try a simple ECU reset. Other odd issues people have experienced have been resolved by simply resetting the ECU (disconnect the battery for 10-20 mins and reconnect).

Kaiser370z · 10-11-2011, 01:16 PM

Guys I went to the dealer
They checked my car and told me " your car is just fine, your car's transmission is fine "
So I will try to reset the ecu
I hope it wil fix the problem

corbin09 · 10-11-2011, 02:52 PM

Quote:

Originally Posted by Kaiser370z

Guys I went to the dealer
They checked my car and told me " your car is just fine, your car's transmission is fine "
So I will try to reset the ecu
I hope it wil fix the problem

That is Nissan's go-to answer. My engine oil was at 260, it is normal, my diff makes a clunk, it is normal, my clutch sounds like junk, its normal.

10-06-2011, 08:12 PM	#1 (permalink)
Kaiser370z Base Member Join Date: Oct 2011 Location: Saudi Arabia Posts: 49 Drives: Varis 370z 7AT Rep Power: 14	Some problems in my Z Hi guys Without any introductions, I will tell you the story Today When I started my Z, it sound was louder than usual It almost sounded like I'm installed an exhaust but I'm not Other than this, when I was in my way to my work I noticed somethings The shifting should be soft when I am driving on D, but today there's something wrong I can feel it when my car shifting It feels like something pushing my car from behind every time the car shifts Also I was trying to stop at the red light and when I reached 20 mph, my RPM suddenly went down and came up again WTF !!! What's happened to my lovely Z ?? BTW my car is 7AT and it's milage is 64k miles

10-06-2011, 10:22 PM	#4 (permalink)
Kaiser370z Base Member Join Date: Oct 2011 Location: Saudi Arabia Posts: 49 Drives: Varis 370z 7AT Rep Power: 14	Mattp725 I will clean my two MAF's today and inform you if anything happened I have an appointment in the stealership ops I mean dealership this Sunday to check the tranny fluid What about torque converter ?? Is there any possibility that the problem could be from the torque converter ?? I am afraid that my gearbox is damaged Last edited by Kaiser370z; 10-06-2011 at 10:25 PM.

10-07-2011, 10:39 AM	#7 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	I'd also try a simple ECU reset. Other odd issues people have experienced have been resolved by simply resetting the ECU (disconnect the battery for 10-20 mins and reconnect). __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

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10-06-2011, 08:38 PM	#2 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 17	Any codes? Sounds like your throttle may be off but there are plenty of other things it could be. I'd start with the easy stuff like checking your AT fluid, a code scanner, checking for loose wires/harnesses. I would also clean the mass airflow sensors... I had a similiar issue in a Mazda when my MAF was dirty. It would stall or near stall and buck sometimes.

10-06-2011, 08:39 PM	#3 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 17	Also being in Saudi Arabia, have you checked your filters? Again I'd clean the MAF because the climate may be impacting the car.

10-06-2011, 10:43 PM	#5 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 17	I'm not very knowledgeable with torque converters but I would think that if you were in park it shouldn't idle higher if it is a damaged torque converter (but I could be wrong).

10-07-2011, 03:53 AM	#6 (permalink)
harry370z Base Member Join Date: Sep 2011 Location: Sydney Australia Posts: 67 Drives: Nissan 370z 2010 Rep Power: 14	Check your engine oil levels!

10-11-2011, 01:16 PM	#8 (permalink)
Kaiser370z Base Member Join Date: Oct 2011 Location: Saudi Arabia Posts: 49 Drives: Varis 370z 7AT Rep Power: 14	Guys I went to the dealer They checked my car and told me " your car is just fine, your car's transmission is fine " So I will try to reset the ecu I hope it wil fix the problem