zman62

Hi guys,
My z starts and idle well. After driving the car and it warms up, it stalls while driving. When the car is warm, I rev the engine up and let go the pedal, the rpm drops real low that almost makes it stall. So far I replaced the cranckcase water temp, sensor and thermotimer sensor, fuel filter, sparkplugs, but not helping. I hope you guys can help me. Thanks.

NismoPick

Have you read the spark plugs? Checked timing? Checked fuel pressure (running and off)? Ohm checked the CHTS?

zman62

What is CHTS? Do you think it is the fuel pressure regulator? I have no idea how to check the timing. I guess I need a timing gun? To be honest, I have very limit skill with cars. I am just trying to fix the simple things.

NismoPick

First thing to do is download the FSM: http://www.xenonzcar.com/s130/fsm.php
CHTS = Cylinder Head Temp Sensor. Located between spark plug 5 & 6 (80.5-83), or in the thermostat housing (pre-80).
Test fuel pressure with a T hooked into the line between the fuel filter and fuel injector rail. Running pressure should be 30-35psi and should not leak down when off.
Yes, checking timing requires a timing light (gun).

zman62

Thanks. I will check the fuel pressure. As far as CHTS, I believe that is the crankcase temp sensor which I did replace. It was running rich,rough and black smoke came out the exhaust. It solved the problem after I replaced that.
I was told that may be the ignition module?