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What is a Leak Detect Pump?


 
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DOUGNRENEES
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Joined: 21 Dec 2005
Location: SYRACUSE NY

PostPosted: Mon Jan 02, 2006 7:16 am    Post subject: What is a Leak Detect Pump? Reply with quote

I have a check engine light that comes up Leak Detect Pump Solenoid Circuit. What is this? I assume it has something to do with the emission control, but how do I fix or even check the problem?
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ThePhantum
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Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Mon Jan 02, 2006 1:46 pm    Post subject: Reply with quote

The LDP applies vacuum to the fuel EVAP system to check for leaks. If it finds one, the computer trips the check engine light. 95% of the time, it's due to a loose or faulty gas cap.

If the cap turns out to be fine, replace the vacuum lines to and from the pump. Since the LDP can detect a leak from a hole as small as 0.040" you might visually inspect the hoses and not see a hole. So it's best to just replace them.
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