1994 Ford Ranger High Idle

FORD RANGER
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DJFIRE0101
  • MEMBER
  • 2 POSTS
My 1994 Ford Ranger, 2.3L 5spd man 4X4 85,000 miles will idle high, 5000 - 6000 rpms, at times while driving, coasting and while not moving at all. I tried pulling up on the gas pedal when this happens, reving the engine and neither helps.
Oct 30, 2006 at 11:02 AM
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TE1976
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  • 6 POSTS
Locate Idle air control valve and peck on it during erratic idle.....if it idles down replace and also perform or have someone perform a fuel system service to remove carbon deposits.
Oct 30, 2006 at 11:58 AM
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BRUCE HUNT
  • ✓Experienced Mechanic
  • 3,754 POSTS
Air in the cooling system can cause a surging of the engine. Check the intake manifold or manifold gasket for a leak that adds extra air to the system and confuses the computer.
Oct 30, 2006 at 1:25 PM

Suggested Repair

Check the intake manifold and manifold gasket for a leak that lets in extra air and confuses the computer. Also tap the idle air control valve during the high idle; if the idle drops, replace the valve and have a fuel system service done to remove carbon deposits.

Conversation Summary

A 1994 Ford Ranger 2.3L with a manual transmission intermittently idles at 5000-6000 rpm while driving, coasting, or stopped. Pulling up on the gas pedal and revving the engine do not help. Advice was to tap the idle air control valve and replace it if the idle drops, plus clean carbon with a fuel system service, and to check the intake manifold or gasket for an air leak that can confuse the computer. Air in the cooling system was also mentioned as a possible cause of surging.

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