What is a leak detection pump on a Jeep Wrangler?
Dorman – Fuel Leak Detection Pump (Part No. Engineered from high-quality plastic for a long-lasting service life, Dorman’s Fuel Vapor Leak Detection Pump ascertains leaks or related problems in the fuel system. A functional Vapor Leak Detection Pump is necessary in states that require an Emissions Inspection.
What does an ESIM switch do?
First, when the vehicle is running, the EVAP system is pressurized due to natural vapor pressure. If the EVAP system is sealed, the pressure overcomes the weight in the ESIM and the ESIM switch moves to the closed position. When the switch closes, the PCM recognizes that the system is sealed and then passes the test.
What does the leak detection pump do on a car?
The leak detection pump is the component that often triggers those “Check Engine” warning lights when it detects small leaks that would be hard to see.
How does the leak detection system ( LDP ) work?
The leak detection system tests for EVAP system leaks and blockage. It also performs self-diagnostics. During self-diagnostics, the Powertrain Control Module (PCM) first checks the Leak Detection Pump (LDP) for electrical and mechanical faults.
Is the leak detection pump covered under the warranty?
Your car may still be covered under the five year/50,000 mile emissions warranty.If so, you should not have had to pay a penny for that repair since the leak detection pump (LDP) is an emission control device, as is the charcoal canister (also called the vapor canister). If they are bad, there should be no charge for repair or replacement.
How does the PCM work on a leak detection pump?
Based on reed switch input, the PCM de-energizes the LDP solenoid, causing it to block the vacuum port, and open the atmospheric port. This connects the upper pump cavity to atmosphere through the EVAP air filter. The spring is now able to push the diaphragm down.
Do you need a fuel vapor leak detection pump?
If you need a fuel vapor leak detection pump or other EVAP system parts, check out O’Reilly Auto Parts and browse our selection to find the fit for your car, truck, or SUV.
How to repair a bad leak detection pump?
The proper repair of a bad evaporative leak detection pump involves a thorough understanding of how the various computer controlled and monitored components in the Evaporative Emissions Control System interact with each other.
How to check Dorman OE Solutions leak detection pump?
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Can a bad leak detection pump cause a smog test?
A bad evaporative leak detection pump can cause your vehicle to fail a smog test. Many factors can cause a bad evaporative leak detection pump, but there is a single warning sign of a bad evaporative leak detection pump: Your Check Engine Light illuminates.