Hi, I was wondering if any one knows what might be the cause of this problem with my oil pressure light?
I have a 94 toyota camry with a 2200 2.2L with 221,500 miles on it. well sofar I changed the thermostat, water pump, timeing belt, oil pressure switch cam seal and the lower crank seal. because it had a bad oil leak and just to keep it safe the I always change the timeing belt on a high mileage engine but I did not change the oil pump yet, when I drive it around town it seams to be ok but when i drive it at highway speeds for a little while and when I come to a stop the light flickers on and off and when i give it a verry little gas it shuts off? well I had the oil changed 3 times already with diffrent weights and nothing works?

can someone please help me?

 

What happens to the oil pressure light if you rev the engine in park?

Suggest you replace the oil pressure sender with an oil pressure gauge

You should be able to jury rig a mechanical or electrical gauge and run it into the car. Electrical might be better because of faster response time.

Determine if the oil pressure is dropping below 4 psi.

Oil pressure should be 4.3 psi or more at idle.

36-71 psi at 3000 rpm

 

you seem to have lots of money since you are changing the timing belt often, I suggest you to bring your car to experts since you spend a lot.