Ford Obd Code 79 is a common issue that many Ford owners face, and it can be quite frustrating. This code indicates a problem with your vehicle’s evaporative emissions system, specifically a leak in the system.
The evaporative emissions system (EVAP) is responsible for preventing fuel vapors from escaping into the atmosphere. It does this by capturing the vapors and routing them back to the engine to be burned. When there is a leak in the system, the vapors can escape, resulting in a failure to pass emissions testing.
What are the symptoms of Ford OBD code 79?
The most common symptom of a leak in the evaporative emissions system is the “Check Engine” light coming on. However, you may also notice other symptoms such as:
- Reduced fuel economy
- A strong smell of gasoline
- Difficulty starting the engine
How to diagnose Ford OBD code 79
Diagnosing Ford OBD code 79 requires a bit of time and patience. You’ll need to follow these steps:
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Inspect the EVAP system: Start by visually inspecting the EVAP system for any signs of damage, leaks, or loose connections. Pay particular attention to the following components:
- Fuel tank: Look for cracks, rust, or holes in the fuel tank.
- EVAP canister: Inspect the canister for leaks or damage.
- EVAP hoses: Check the hoses for cracks, leaks, or loose clamps.
- Purge valve: Ensure the purge valve is opening and closing properly.
- Vent valve: Inspect the vent valve for leaks or damage.
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Use a smoke machine: If you can’t find any visual signs of damage, you can use a smoke machine to test for leaks in the EVAP system. This involves introducing smoke into the system and observing where it escapes.
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Perform a pressure test: A pressure test can help you identify leaks that may be difficult to spot visually. The test involves pressurizing the EVAP system and then measuring the pressure drop over time.
How to fix Ford OBD code 79
Once you’ve identified the source of the leak, you can begin to repair it. The repair process will vary depending on the specific cause of the leak.
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Replace damaged components: If you find a crack, leak, or hole in the fuel tank, EVAP canister, or hoses, you will need to replace the damaged components.
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Tighten loose connections: If you find any loose connections, tighten them up.
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Replace the purge valve: If the purge valve is not opening and closing properly, you will need to replace it.
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Replace the vent valve: If the vent valve is leaking or damaged, you will need to replace it.
Expert advice:
“It’s important to note that a leak in the EVAP system can lead to serious consequences, including damage to your engine,” says Richard Taylor, a certified mechanic with over 20 years of experience. “If you suspect a leak in your EVAP system, it’s best to have it diagnosed and repaired by a qualified mechanic.”
FAQ:
Q: Is it safe to drive my car with Ford OBD code 79?
A: While it’s generally safe to drive your car with a minor leak in the EVAP system, it’s best to address the issue as soon as possible to prevent further damage.
Q: Can I fix Ford OBD code 79 myself?
A: You can attempt to repair a leak in the EVAP system yourself, but it’s recommended to seek professional assistance if you are not comfortable with automotive repairs.
Q: How much does it cost to fix Ford OBD code 79?
A: The cost of repairing Ford OBD code 79 can vary depending on the severity of the leak and the specific repair required.
Q: Will fixing Ford OBD code 79 help my car pass emissions testing?
A: Yes, fixing a leak in the EVAP system will help your car pass emissions testing.
Q: What if I don’t fix Ford OBD code 79?
A: If you don’t fix the leak in the EVAP system, you risk causing damage to your engine, which can lead to expensive repairs. You may also fail emissions testing.
Conclusion:
Ford OBD code 79 indicates a problem with your vehicle’s evaporative emissions system. It’s essential to address the leak in the EVAP system as soon as possible to prevent further damage. If you are unsure how to fix the issue, consult a qualified mechanic.
If you have any questions or need assistance with Ford OBD code 79, please don’t hesitate to contact us. We are here to help!