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SAE 10w30
www.autozone.com
spark plug torque for a Toyota 2.4 is 95 inch/lbs
check the Distributor.
Toyota Previa was created in 1990.
Tail lights are replaced by removing the entire rear plasic cover to the back hatch.
how to replace a heater matrix in a toyota previa
Check coil pack.
It is at the dash board bottom just at the middle. You can see a plastic rectangle were the heater core is and at the right side are the pipes that goes to the coolant valve at the engine
Well in my case (91) previa the connection inside f the blower housing had vibrated loose.
If its shorting or open, then YES