Problem

Buzz from under the hood when changing engine RPM.

Possible Cause

The AIR pipe contacts the fuel line attachment stud on the dash panel.

Correction

1. Open the hood and visually inspect the pipe for contact with the stud.
2. Loosen the hose clamp on the AIR pipe at the check valve.
3. Rotate the hose on the valve to reposition the pipe to gain clearance to the stud.
4. Make sure clearance is maintained to the exhaust manifold.

Problem

Rattle from under the hood.

Possible Cause

The hood striker is bouncing in the hood latch.

Correction

1. Gently apply up and down pressure to the rear edge of the hood checking to see if the hood is snug to the anti rattle bumpers.
2. Adjust the anti rattle bumpers up to be snug to the hood .
3. Lubricate the bumpers and strikers with grease.
4. Lower the hood latch if necessary to maintain hood to fender flushness.

•	The hood should be 1 mm (0.004 in) low with no bumper contact.

•	Level the hood by raising the bumpers.

•	The hood latches should lock when the hood is lowered with a minimal amount of additional downward force.

Problem

Rustle sound, or sound of rushing water, from under the hood.

Possible Cause

The fuel lines are contacting the bottom of the plenum panel.

Correction

1. Open the hood.
2. With the engine running apply pressure to the fuel lines at the plenum panel and listen for noise.
3. Insulate the fuel lines from the plenum with closed cell tape.