1991 Eagle 2000 GTX Idle RPM Surging

MITSUBISHI
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JUDYS
  • MEMBER
  • 1 POST
I have a 1991 Eagle 2000 GTX 16 valve dohc (Mitsubishi engine) std transmission & 178,000 km's.

If the car is sitting idling, the rpm's will rev up and down but will drive normal. When you come to a stop and have the clutch in, the revving will start again until you start moving.

Additionally I've noticed that when you take you foot off the gas pedal and the car slows to a slow speed, it will jerk. I don't know if the two are related or not.

Twice I have had to the mechanic to try and fix but any readings taken from the computer will not identify any problems. Thought it was the mass air flow center & a replacement was installed and did not fix the problem.

I'd really appreciate any help I can get
Feb 19, 2006 at 10:56 AM
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ANTONIOTGSX
  • ✓Experienced Mechanic
  • 18 POSTS
Air leak from the intake manifold causing rough idle..... get a new Mass Air Flow sensor..... and clean your air intake
Mar 6, 2006 at 1:24 PM

Suggested Repair

Inspect for an intake manifold air leak, install a new mass air flow sensor, and clean the air intake.

Conversation Summary

Owner of a 1991 Eagle 2000 GTX with a Mitsubishi 16-valve DOHC engine and manual transmission reports idle RPM surging while stopped with the clutch in, plus jerking when slowing after lifting off the throttle. Computer scans found no faults, and a mass air flow sensor replacement did not fix it. The expert attributes the rough idle to an intake manifold air leak and recommends a new mass air flow sensor and cleaning the air intake.

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