Question about 1993 Saturn SL2

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4000 rpm when I start my 1999 saturn sl2.

When I start the car, it immediately jumps to over 4000 rpm. I immediately turned it off for fear I would ruin engine. What is causing this?

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Had the same prob, Replaced the ECTS (Engine Coolant Temperature Sensor)
The ECTS is located to the right of, and just below the EGR on drivers side of motor, there are two sensors that look the same, one has two lead wires (Replace this one) the other (single lead) is for your Temp Gauge.

Cost: Under $20
Replacement Time: 5 mins.
Tools needed: Needle nose pliers to remove connector
13 mm deep walled socket wrench to remove sensor
Rags to soak up any antifreeze that leaks out when old sensor is removed. (try to stay off of the upper radiator hose) and work with a COOL Engine.

Posted on Mar 02, 2009

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Check the intake manifold gaskets for leaks. It also could be the Idle speed control motor

Posted on Mar 01, 2009

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