Okay ..
My RPM drops below 500 at idle and rises to 1,200 ... it feels like the car is about to stall when it drops but then the engine is keeping itself alive by lifting the RPM pass 1000. The shop i went to today, told me the fuel injectors needed to be cleaned. So, they cleaned it, but problem is not solved. They also said it's not the alternator. Anyone know?

I appreciate anyone's help!

1994 E320

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Perhaps a throttle actuator is needed to correct the erratic idle, you may want to have it tested prior to replacing it as it is costly. You may find some DTC's (Diagnostic Trouble Codes) that can be helpful, have the CC/ISC or EA (depending on your equipment) scanned for codes.

Check the OVP, Fuel Pump Relay, MAF sensor, O2 sensor.

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Zafar
94 E320 58000 Miles