1994 previa. Hard knocking when foot on brake and in drive or reverse. Replaced spark wires, rotor, and cap

1994 TOYOTA PREVIA
200,000 MILES
Avatar
CORNBREAD777
  • MEMBER
  • 1 POST
Think oil pump?0
Jan 7, 2012 at 4:24 AM
Advertisement
Avatar
RIVERMIKERAT
  • ASE Certified Mechanic
  • 6,110 POSTS
  • ASE Certified Mechanic
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.
Jan 7, 2012 at 4:35 AM
Avatar
KHLOW2008
  • ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Where is the knocking coming from?

If external, I would suggest checking the engine mounts.

Oil pump would not cause knocking, especially when stopped.
Jan 7, 2012 at 2:00 PM
Avatar
RIVERMIKERAT
  • ASE Certified Mechanic
  • 6,110 POSTS
  • ASE Certified Mechanic
Unless it caused a spun bearing.
Jan 9, 2012 at 9:05 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.