gthoover
Dec 6, 2010, 04:54 PM
My 1998 Honda Prelude has trouble starting on very cold mornings. Need diagnostic advice. Engine was recently rebuilt.
TxGreaseMonkey
Dec 6, 2010, 06:01 PM
. Check/replace the Engine Coolant Temperature (ECT) Sensor, which affects fuel injector pulse width. The ECT Sensor is a temperature dependent resistor (thermistor), whose resistance decreases as the engine coolant temperature increases. It provides a richer mixture when cold, leaner mixture when hot. They become corroded, due to not changing the coolant frequently enough.
. Check the Fast Idle Thermo Valve:
https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-7.html#post842969