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Matt, Engineer
Category: Nissan
Satisfied Customers: 20397
Experience:  BEng hons Mech engineering, worked in auto industry for 22 years on engine, transmission and suspension design
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1991 300zx n/a shut off while driving wont start few days

Customer Question

1991 300zx n/a shut off while driving wont start few days later it started back up took it for a ride same thing happened again new motor/new injectors with about 100 miles on it replaced fuel filter and still have problem. i have a new fuel pump but haven't installed it yet
Submitted: 4 months ago.
Category: Nissan
Expert:  Matt replied 4 months ago.


This could be a wiring issue as things tend to expand when hot and its possible a poor or partial electrical connection is being pushed apart on one of the major sensors so check the connection plug and wiring to the following;

Airflow meter

Crank position sensor

Cam position sensor

O2 sensor

Throttle position sensor

unplug each in turn and use some switch / contact cleaner spray on the pins to ensure its all grease / dirt free

Also worth checking the connections to the fuel pump for the same reason - unplug each in turn and give them a good squirt of switch / contact cleaner - Not WD40

and also unplug and inspect the main power relays and fuses for signs of overheating or corroded terminals - so the ones for the ECU and the fuel pump

And also unplug the wiring loom connections in the engine bay one at time and inspect for corroded or recessed pins.

Expert:  Matt replied 4 months ago.


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