Mitsubishi Eclipse Idle Speed

24 Mar 2015 | Author: | Comments Off on Mitsubishi Eclipse Idle Speed
Mitsubishi Eclipse

Questions and Answers

Mitsubishi Idle Speed

Q. Hello, I a 1991 Mitsubishi Eclipse, 2.0 DOHC non-turbo, 133,000 5-speed. I#8217;ve owned car for about a year and a half, and since I bought it, it#8217;s some odd things that really been a problem recently. Usually when I the car on, it would idle a bit high, 3,000 rpm, for a few seconds, start rapidly speeding up and down (between about and 1,500 rpm, making a

VRoom. VRoom. sort of

As soon as the engine started to up, this slowed down and stopped altogether, idling 800 rpm. However, recently gotten a bit worse. The engine slow down at all once up.

The rapid cycling just constantly.

Also, whenever I the gas the slightest tap the engine jumps up to 3,000 rpm for a few seconds. Needless to this is a real pain in the when trying to drive Now, a friend of mine had a problem and said to replace the O2 However, the only thing the sensor did was make the exhaust worse.

And I have absolutely no idea else to try.

Someone suggested that the EGR valve be to blame. Another said I check for vacuum leaks. said the fuel pump be the culprit. I really don#8217;t what to try, or how to go about this.

I can#8217;t really to buy parts and keep switching until I find out what#8217;s nor can I afford to pay a mechanic.

The only other relevant I can give you is that the car seems to a few exhaust leaks, and that it to burn through a lot of oil. But no blue smoke coming the exhaust. Do you have any suggestions as to parts I should check for or what might actually be the

Any help or advice would be appreciated.

Thanks very

A. The first thing I would at is the Idle Speed Control Servo.

Mitsubishi Eclipse

The Idle Speed (ISC) servo, located on the chamber regulates and controls the for the loads placed on the engine.

The ISC is a stepper motor that the amount of air taken in through the circuit of the intake manifold by and closing the servo valve in the air passage. The ECU will supply in one polarity direction, which turn the motor in a particular

Connected to this motor’ s= is= a= screw= that= when= either= opens= the= or= closes= the= passage= upon= rotation)= by= moving= pintle.= when= the= reverses= polarity,= the= is= closed= in= the= same=

The ECU several sensor inputs to the operating condition of the engine and the being placed on it.

The ECU adjusts the for air conditioning and automatic transmission and controls fast idle for start. The ECU uses the idle control (ISC) servo to all of the adjustments to the idle.

With this many on it, it is probably gummed up. I would try the throttle body and the ISC Servo. could very well the problem.

Additional Information courtesy of ALLDATA

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