. HARD KNOCKING WHEN FOOT ON BRAKE AND IN DRIVE OR REVERSE. REPLACED SPARK WIRES, ROTOR, AND CAP

1994 Toyota Previa

Tiny

Cornbread777

January, 7, 2012 AT 4:24 AM

Think oil pump?0

FOUND 1772 RELATED QUESTIONS

3 Answers

Tiny

rivermikerat

January, 7, 2012 AT 4:35 AM

If you suspect the oil pump, rent or borrow an oil pressure gauge from a parts store. Remove the oil pressure sending unit (lower side of the engine by the oil filter) and install the pressure gauge. Start the engine and check the pressure reading. Should be at least 30-35PSI.

Tiny

KHLow2008

January, 7, 2012 AT 2:00 PM

Where is the knocking coming from?

If external, I would suggest checking the engine mounts.

Oil pump would not cause knocking, especially when stopped.

Tiny

rivermikerat

January, 9, 2012 AT 9:05 PM

Unless it caused a spun bearing.

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