1993 Mitsubishi Eclipse Idle Codes

1993 MITSUBISHI
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GREGBLYDE
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  • 1 POST
I have a 1993 Mitsubishi Eclipse 1.8L with 140k. I hooked up a flashing diode to get the error codes. When I turn the key on I get continuous flash, like no errors. After the car has started I get a Intake Air Temp Sensor(13), Idle speed control motor position sensor(15), Engine coolant temp sensor(21) and Barometric pressure sensor(25).
I've tested each of the sensors according to the Haynes manual and all test satisfactory.
The idle speed control motor does appear to be bad because the car doesn't idle or adjust it's idle when lights or heater is turned on. I just screwed in the idle screw so it stays running for now.
Recently bought the car. Any help appreciated!
May 6, 2007 at 7:50 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
[quote:d1fc20f69f="gregblyde"]I have a 1993 Mitsubishi Eclipse 1.8L with 140k. I hooked up a flashing diode to get the error codes. When I turn the key on I get continuous flash, like no errors. After the car has started I get a Intake Air Temp Sensor(13), Idle speed control motor position sensor(15), Engine coolant temp sensor(21) and Barometric pressure sensor(25).
I've tested each of the sensors according to the Haynes manual and all test satisfactory.
The idle speed control motor does appear to be bad because the car doesn't idle or adjust it's idle when lights or heater is turned on. I just screwed in the idle screw so it stays running for now.
Recently bought the car. Any help appreciated![/quote:d1fc20f69f]

Get the idle squared away so that it can relean its target speed.
May 6, 2007 at 6:32 PM

Suggested Repair

Correct the idle speed control so the ECU can relearn its target idle speed.

Conversation Summary

The owner of a 1993 Mitsubishi Eclipse 1.8L retrieved codes 13, 15, 21, and 25 after starting, although the sensors tested satisfactory. The idle speed control motor appears faulty because idle does not adjust with electrical loads, and the idle screw was adjusted to keep the engine running. The expert advised correcting the idle so the ECU can relearn its target speed.

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