hard to start in the morning, and lacks power

2002 SATURN SL1
245,000 MILES • 1.9L • 4 CYL • 2WD • AUTOMATIC
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TRISHA2
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my Saturn only starts went I push down on the gas panels if I don't it just shuts off, then the engine would shake even the car. when I drive it, it takes off down hill and when I come to a complete stop the car takes off really slow the rpm would go to 4000 and I release the gas panels it shifts and going up hills it loses poweruuntil I turn the car completely off and turn it back on it has a oil more power. I changed most of the sensors got the cat replace six months ago map sensor, o2 sensors, etc
Jan 9, 2014 at 9:22 PM
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SATURNTECH9
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Doesnt shift till you let off the gas most of the time thats a plugged cat I know you replaced it 6 months ago but sounds like one.Which one did you replace the one under the car or the one innthe exhaust manifold?Also are you sure you have a SL1 model can you post a pic of the car?
Jan 10, 2014 at 8:15 AM
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TRISHA2
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it's the one cat I replace in the middle of the car not the one close to the engine.
Jan 10, 2014 at 8:46 AM
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TRISHA2
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I tried posting a picture it won't work yes I have an sl 1 sohv
Jan 10, 2014 at 9:01 AM
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TRISHA2
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my car doesn't overhear just lacks power
Jan 10, 2014 at 9:54 AM
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SATURNTECH9
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Have you replaced the coolant temp sensor and inspected the connector for corrosion?Also the cat in the exhaust manifolds can clogg up or break loose.
Jan 10, 2014 at 11:59 AM
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TRISHA2
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ok I'll check it out I change the coolant sensor but don't know the manifold can clogg up. th first time it happen I was at a stop light and my car made a clogging sound thats when it lacked power. and started shaking it was running really good
Jan 10, 2014 at 1:58 PM
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SATURNTECH9
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Have a back pressure test done on the exhaust when it doesnt have power.
Jan 10, 2014 at 2:40 PM