Originally Posted by
John Kaufmann
Have you cleaned out the EGR line, through to (and including) the throttle body? At ~20 years old (~300K miles), my 91 Previa EGR line to the intake manifold was completely blocked at the cold end (next to throttle body). Before starting that job, make sure you have 2 new line plugs (90331-16001), because you will not be able to reuse the old ones. You will also need a throttle body gasket (22271-76010). [I just checked: ToyoDIY says they used the same parts on all Previas of that vintage (TCR1*,TCR2*).] It looks like the plugs (~$3 each) and TB gasket (~$5) are still widely available - better than many parts of that era.