2002 Other Saturn Models high rough idle

2002 SATURN

98,000 MILES • 4 CYL • FWD • AUTOMATIC

DANIEL_318

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2002 Saturn SL 2 1.9 L, I am experiencing a high RPM (1800) & a rough idle, getting codes P0301, P0507 I have replaced plugs & plug wires, coils, complete fuel rail w/ 4 injectors Code P0301 is # 1 cyl missfire, code P0507 indicates high idle, Got any ideas?
Dan

Feb 16, 2008 at 4:23 PM

BLACKOP555

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10,386 POSTS

First you should clean out the throttle body then reset the code and see if it comes back,

did the Missfire code go away?

Feb 16, 2008 at 6:32 PM

DANIEL_318

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2 POSTS

I tried cleaning out the throttle body & got a lit of black slime out of there, however it did not cure the problem. Maybe the injector circuit? PS Thanks so much for responding to the querry so promptly.
Dan

Feb 17, 2008 at 1:48 PM

BLACKOP555

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10,386 POSTS

Next change your PCV valve and make sure the hose and the rubber boots/elbows are not rotted or cut

Feb 17, 2008 at 2:00 PM