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Matt
Matt, Mechanical Engineer
Category: Honda
Satisfied Customers: 20607
Experience:  BEng hons Mech engineering, in auto industry 22 years
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94 Honda accord EX drives beautifully.' cuts off when

Customer Question

94 Honda accord EX drives beautifully.' cuts off when driving. Starts back up and drives beautifully. Changed out everything. Changed fuel filter, fuel pump , map sensor engine coolant temperature sensor idle air control valve ECU, erg valve, main relay, ignition switch and harness wiring, had distributor unit fully checked out, had grounds checked, changed map sensor, change purge valve solenoid,change the fuel regulator
Submitted: 4 months ago.
Category: Honda
Expert:  Shantal-Mod replied 4 months ago.
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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.

Check the resistance of the spark plug leads ( 13-15Kohm / metre) and replace if any doubt or high resistance - Also replace the spark plugs if any of them fail this checklist:

http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp

Expert:  Matt replied 4 months ago.

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