5 Signs of a Faulty Cold Start Valve 5 Signs of a Faulty Cold Start Valve

Among the signs of a faulty cold start valve are difficult starts, no start at all, engine flooding and start/stop issues. Learn more below about the 5 signs of a faulty cold start valve and how to fix them.

Sign #1: Difficult Start - Delay and Hesitation

If the cold start valve is set to run for too long, your car will hesitate in starting and crank for a long period of time before starting. To fix: reduce the thermometer start interval to between 2 and 5 seconds.

Sign #2: Engine Does Not Start at All

Your cold start valve may be clogged. No initial burst of fuel is reaching the engine. To fix: Find and clear the clog in the cold start valve.

Sign #3: Engine Floods When Trying to Start

The cold start valve is leaking, sending too much fuel at start-up. To fix: Find and fix the leak, or replace the cold start valve.

Sign #4: Engine Starts and Then Stops

The cold start valve's pressure is too high, creating too lean an air/fuel mixture. To fix: Lower the cold start valve pressure slightly.

Sign #5: Engine Smokes When Started, Then Stops

The cold start valve's pressure is too low, creating too rich an air/fuel mixture. To fix: Raise the cold start valve pressure slightly.

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