No Start / No Spark / No Check Engine Light - Hidden Kill Switch

Electricalbeginner✓ OP Confirmed

Problem

Car suddenly would not start despite having fuel pressure. Owner had been troubleshooting fuel pump relay and ECU signal issues, but the car had been running perfectly just 10 hours prior with no changes made. No check engine light at all - not blinking, not constant, nothing.

Engine cranks but will not startNo sparkNo check engine light at all (no blink, no constant light)Fuel pump operates and delivers 40 psi to fuel railCar was running perfectly ~10 hours priorNo changes had been made to the car before the issue appeared

Root Cause

A hidden kill switch installed by the previous owner was accidentally bumped while getting in or out of the car. The switch was mounted underneath the dash, completely hidden from sight unless a piece of dash trim was pulled down. It was wired into the ignition/electrical system in a way that cut spark and ECU power, but was not obvious when checking fuses and wiring.

Confidence

High confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted February 2016 on SupraForums.com