Difficult Cold Start

WARNING: This page is about a different car, the 1996 Isuzu Oasis. However, it is still accessible from the selected car via links, so may be relevant.

Check Engine Coolant Temperature (ECT) sensor circuit for proper operation.
Check Manifold Absolute Pressure (MAP) sensor circuit for proper operation.
Check TDC/CKP/CYP sensor circuits for proper operation.
On Accord and Odyssey, check fast idle valve for proper operation.