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