joegreen

Today I replaced my front and rear valve covers. The valve covers are back on but everything else is still off. What are some things I should change while I have the space. I am going to replace the spark plugs. Should I replace the injector o rings? What about the fuel pressure regulator? Wasn't there some problem with those? Thanks.

Oro

If you have a certain year with known issues there, but I'm unaware of those problems being worth doing just for the fun of it.

Clean or replace your PCV valve; it's accessible but it's easier with the plenum off.

It's also really good to leave the covers sit overnight and re-torque them the next day if you can; helps correct for any set the gasket takes from compression (some do, some don't right away).

speedkar9

+1 on the PCV and its hose. Even easier if the valve covers are off.

If you have a 97-98 ES with waste spark, change the wires too.

If you really want to get deep into the engine, take off the intake manifold and change the coolant bypass hose and maybe even the brittle wiring harness for the knock sensors.

It might even be easier to replace the rear O2 sensor with the intake off, but wait till it fails.

DRACO A5OG

+1, I would replace the Knock Sensor Harness and By-Pass Hose, both are cheap considering.