2001 Saturn SC2 Questions

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Car still idols high for a period of time before going down sometimes this doesn't happen doesn't matter if it's hot or cold what else could be wrong

Here is the scoop I have replaced the following parts in the past 3 months or so. Everything is up front ...Both crontol arms which would include the ball joints, both front wheel hub assemblys new rotors,brakes,brake calipers,inner and outer tie rod ends, brake caliper hoses ,driver side axle .... rear drums and shoes car has been lined up twice in past 4 months and now when I hit my brakes the car pulls to one side and the wheel cocks to the opposite side plus while taking a turn the car will jerk then settle back on once straight again also shakes like a bitch doing anywhere from 60 to 75 mph. Any insight or help would be awesome not sure what the problem is

Can't get it to pass smog same codes

after this mornings very cold Hard start running fine

I have replaced plugs.wires.injecter.coil packs and plate.fuel filter.air filter.compresson tested.what else could it be..converter maybe.runs great at lower rpm an it don't even set Code po303 unless u get into the gas to pass a car

Change my battery. Ran for 15 minutes, turned it off and when I went to turned it back on there was no electrical anywhere. No lights even. Hooking my battery to my wife's car battery still no electrical activity.

This is the third time it has happened in about a month's time frame. The last two times it happened it started right back up after a few minutes. This time it just wouldn't start at all. When I try to start it it doesn't even turn over. Lights and everything else work. Tried to get a jump and it wasn't the battery. So I don't know what else it could be or where to start.

There are no codes stored in the pcm. Ive replaced both 02 sensors, fuel filter, anti knock sensor, spark plugs/wires, and the pcv. Ive disassembled and cleaned the throttle body, run a heavy duty 3m injector cleaner through her, checked for vacuum leaks,
checked the egr isn't clogged, removed and flushed all the valve lifter, fuel pressure is 48 lbs steady, and still.

It is a wrapping that is most pronounced aroundf 3000 rpm when you are just about to shift. It vanishes if you let off or nail the throttle to the floor So its maintaining a rpm + or - 10% throttle otherwise it disappears.

Im thinking it could be mechanical at this point but not typical symptoms in my exp. Im ready to tear her down but wonder its something I may have missed with the pcm or sensors controlling it to do so...

Hey Parts Guy, I sent an email to jmgrhm30@gmail, but haven't heard back? Thanks Jamie

what is the proper procedure to ensure accurate diagnosis of code P0303? Thaks

The car has had new spark plugs, wires, both O2 sensors were changed, lots more but cant seem to get this problem. Would changing the trans filter help?

The carpet is constantly wet. Don't know where to start to diagnose the problem and/or the cost of the repair.