I have a 2007 Saturn ion 2.2. when it rains it will have a delayed start just for about one sec. Then it will idle rough with the check engine light on. But after a day or two it will crank and run fine. The check engine light will stay on for two days after it's running fine. Then the light will turn off until it rains again. I have cleaned the TB several times and its always clean.
When the light is on have it checked for DTC'S - diagnostic trouble codes , do you know what they are ? Ignition system problem , coil's , plug wires if the vehicle has then . The check engine light code is probably for a engine misfire . Check Engine Light On
SOURCE: 95 saturn won't start when hot
Blair, I would take a look at he TPS (throttle position sensor) located on the throttle body. In other words, it sounds as thought sensor when heated is changing its value to "open" or "shorted".
If the car starts OK when cold, use a hair dryer to heat the TPS when the engine is cold to see if you can duplicate the problem.
Also is the a service engine light on? Codes?
If you have a "digital volt/ohm meter" available you can read the variable resistance of the sensor when the problem occurrs to determine if the sensor is defective.
SOURCE: Rough Idle/Runs Rough and low power
I would take it in and have them do a diagnostic on it, sounds like the cam shaft sensor to me.
SOURCE: My saturn was running fine. Then it would shift very hard
well if it shifts very hard into every gear that means the pressure control solenoid in the trans went bad and it causing the trans to go to max line pressure thats why it shifts so hard,,,it does that so you can still drive it even thou it broken,anyhow the PC solenoid is under the trans pan which is on the TOP of the trans under the battery,,,,not too hard a job to do, the parts are about $100 labor might be about $200,,,easy fix,,could be alot more,,,and if you dont fix it ,it will break other stuff in the trans and cost alot more,,,
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SOURCE: reduced power light/check engine runs very rough
usually when it gets colder outside the car will misfire and run rough because the ignition module/coil pack goes bad and makes it misfire,youre gonna have to replace the coil and module,,its the black long piece that sits on top of the spark plugs,1 wire connector and 4 10mm bolts remove them and pull up hard to pop the plug boots off the spark plugs,then install the new parts and you should be ok
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SOURCE: 2006 saturn ion dome light goes on by itself and
When this happened to mine it ended up being a bad door switch. The alarm, dome/map lights and electric door locks are all connected to the door switches. It cost $65 for diagnosis, parts and labor at Saturn of South Burlington VT
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