1992 Dodge Ram 50 Surging

1992 DODGE RAM
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JIM COLLINS
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  • 1 POST
This Mitsubishi motor runs fine for an indefinite period then begins surging to such an extent as to be undriveable. A Dodge mechanic analyzed it and assured me it was the Idle speed control (or Idle Air Control), which I replaced, and the problem remains the same. Someone else suggests the EMC or engine control module .
Feb 20, 2007 at 1:40 PM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
If there are no vacuum leaks, and the minimum idle screw has never been touched then you should try cleaning out the throttle bore. Use a little carb spray and a rag to clean where the air intake hooks up to the engine, clean all around the throttle plate
Feb 21, 2007 at 12:11 AM

Suggested Repair

If there are no vacuum leaks and the minimum idle screw has never been adjusted, clean the throttle bore and around the throttle plate with carburetor spray and a rag where the air intake meets the engine.

Conversation Summary

The owner of a 1992 Dodge Ram 50 with a Mitsubishi fuel-injected engine reports that it runs fine for a while, then surges badly enough to be undriveable. Replacing the idle air control did not help, and an engine control module was suggested. The expert recommends confirming there are no vacuum leaks and that the minimum idle screw has not been touched, then cleaning the throttle bore and throttle plate.

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