- Vacuum hose for brake booster.
- Fuel lines.
- Pressure regulator.
- Fuel return line that comes from the pressure regulator.
Further check:
With frequent disconnection and connection of cable connectors, poor contact may occur. Treat the contacts with a special electrical contact spray. Contact tabs can be folded only as a last resort, this should be done carefully.
If you want to check if the engine is sucking in extra air (this is often seen with idling problems), do the following:
1. Check vacuum hoses for cracks and tight fit. Check all hoses that are attached to the intake manifold. These include hoses to the brake booster, fuel pressure regulator, and fuel regeneration solenoid valve.
2. Warm up the engine and leave it to idle. Open the hood.
3. Use a spray can of starting fluid to spray the throttle port, flange seals on the inlet ports and piping to the unit that are controlled using vacuum. To do this, disconnect the detachable connections of the oxygen sensors.
4. If the engine speed changes when spraying any of the listed places, then this means that you have found a leaky place.
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