SOURCE: HIGH IDLE, 1500rpm
No, its the intake manifold gasket. This is a very common problem with the SL/SL1 engine. There are only three bolts around the #1 cylinder and no bridge in the block between #1 and #2 cylinders. The flexible factory gasket tends to pull out in this area.
A confirmation of this is to spray some carburetor cleaner, fuel injector cleaner or even WD40 on the gasket around the #1 cylinder and if it affects the idle in any way, its because its leaking.
Felpro makes a good replacement gasket.
SOURCE: 2001 Saturn Sl1 1.9 Code P0404
Spray carb cleaner around #1 intake runner,known to blow gasket there,Replace leaner egr valve.
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