My Daily R32 Shuts Down After Driving For 20 Minutes

[Are_thirty_two]

Hi guys, I have an r32 gtst. After about 20 minutes of driving, the car will start to play up, the revs will rise at idle, then jerk if I give it gas, then the car will shut down. It will then start up fine again and play up 2 minutes later. I took it to the mechanic who has put in a new air flow meter and fuel filter, and his computer still says there is a problem (after driving for a while) between the ecu and afm. He is currently checking the these wires, as he also disconnected a AFC I had on the car which I suspected was dodgy.

I recently changed the coolant myself and managed to only put in 4.5 litres. During this process, I also poured alot of water around the engine and through the coolant inlet in the firewall.

*So im thinking maybe I F#@ed the coolant temperature sensor.

*Or its probably the crank angle sensor is gone, because after the coolant change, the area around it made a light scratchy sound eased only when I sprayed WD40 around it. The noise kept comming back though.

*Or it could be a bad fuel pump or wires in the around the ecu is gone.

Please help out as this is my daily, my parents dont drive, and I may have to leave my job if this problem is unsolved by the middle of next week.

Should I take it to Nissan?

[T04GTR]

air flow meter

[T04GTR]

could be all of those. it seems temp related

[R31Nismoid]

I'd say Crank Angle Sensor.

I had identical problems many moons ago as you describe

See if you can borrow a friends or someone local to you to be 100%

[Are_thirty_two]

thanks for the replies. If the crank angle sensor is gone, could it be the reason for showing the fault between the air flow meter and ecu on mechanics computer which he has found. Is it in the loom?

Currently the mechanic is looking at the earths between the ecu and air flow meter.

[R31Nismoid]

Mine gave out all sorts of faults in the Diag Mode.

Nothing that related to the CAS though... go figure

It was most annoying to narrow it down, finally though it was sorted

[Are_thirty_two]

thanx guys for the replies. It ended up being the ground wire, afm and connection to the ecu. The mechanic charged me 780 all up. He removed the afc, put on a new afc and changed the wire going to the ecu. The car now idles at 0.8 revs where as before it was at 1000 and above revs. Is this ok?