I just purchased a used 04 G35 coupe 6MT. After 20 mins that I drove off from the dealer's lot, when I was waiting at a traffic light, the engine shut off, and the "service engine soon" light came on. I couldn't restart the engine immediately. If I waited for a while, the engine could be started, but it would shut off 10 sec. My car was towed back to the dealer, and they diagnosed it which said the crankshaft position sensor malfunctioned. So they replaced the sensor for me.

I got the car back, but the same thing happened again, and the dealer towed car to a Nissan dealership to fix the problem. After a few days, the technician in Nissan said they replaced another crankshaft position sensor and found some loose wire connection so they also replaced the harness.

I got the car back today, and I drove it fine for 15 mins. Something similar happened again, when I accidentally released the clutch and stalled engine. Now what happens is that "VDC off", "Slip" and "Service engine soon" all 3 lights are on. After the engine stalled, it takes a few times to start up the engine again, and all 3 lights are still on, and it seems I still can drive the car. The dealer will take the car back to Nissan again.

I noticed that when the engine is idle, rpm is a little low. A couple of times when I start the engine and press the gas pedal, the engine doesn't rev up.

I am really pissed off by this car.
Does anyone know what the problem might be? Thanks for any help.

 

to answer ur question very shortly is u got a used car and u don't know what the previous owner did to it. Ask the dealer to check if it has any mods.

 

Sounds like there was a reason the other guy traded the car in....

 

Has the throttle reset procedure and idle rpm procedures been done?

 

I don't think those procedures have been done.

 

I found someone had a very similiar problem with mine.

https://g35driver.com/forums/showthr...9372&posted=1#

Do you guys think it's becaused of the MAF or O2 sensor messed up?

Now the car dealer told me might be the problem with a sensor on the clutch, but I don't think those guys know much about the car. The car is back to Nissian again now.