Question about 1993 Saturn SW1

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Has over 200,ooo miles. replaced idler tensioner two months ago, car running better than ever. three weeks ago, rattling sound from engine compartment, than two days later -loss of power. will still drive, just takes a while to get up to 40mph-about 1/2 mile. slow and sluggish, but still drives and seems to shift fine. rattling is consistent whether idling or accelerating-no change. have heard timing belt, valves, transmission. don't know what to look for-already took to mechanic-couldn't pinpoint w/out pulling apart. said not worth fixing-but i don't want to scrap yet.

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Try(just an idea) knock sensor most of the time a egr scan will not pick it up if its bad , heres how to test it : Disengage the wiring connector from the knock sensor and measure the resistance between the sensor and ground. It should be 3300-4500 ohms
here is the location:

Posted on Mar 07, 2009


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