1994 Toyota Previa Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1994 Toyota Previa
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1994 Toyota Previa ProblemsLoss of Power on Highway Due to Internally Leaking Fuel Pulsation Dampener
A loss of power on the freeway may due to an internally leaking fuel pulsation dampener. This commonly occurs on higher mileage vehicles.
At higher mileages (125,000+) the mass air flow sensor may cause the vehicle to idle rough, run rich and even stall. It is recommended to replace the mass air flow sensor with a factory unit because the aftermarket units have very mixed results.
The AC Expansion Valve may develop a very slow leak or allow too much refrigerant flow which reduces cooling. Our technicians tell us that Toyota makes an updated expansion valve to resolve these problems if and when they occur.
1994 Toyota Previa QuestionsCan oil leak into cylinders thru intake manifold? misses on start then smooths (1 answer)
out oil level in reservoir dropping. also appeared to be coolant coming out of exhaust(white smoke)replaced water pump now no loss of coolant but oil level still dropping.
I have new spark plugs, new wires, new distributor cap, new air filter, oil/filter changed. Could It be that the Throttle position sensor is worn out and affecting my timing advance and increase my HC. The NoX is below avg.
the van runn's hot if you drive the van to long