Toyota Pickup 4x4 2.4L idles fast and engine surges

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AL7OU
  • MEMBER
  • 1 POST
1991 toyota
pickup
4x4
2.4L 4 cyclinder
5 speed manual trans
180k milage
no air condition

Hello, truck runs fine except at idle when warm. After warm up the truck idles fast and when brakes applied, engine surges. I checked the vacum line to the brake booster, by disconnecting but still idle is fast. I adjusted the idle speed mixture jet on top of throtle body but even with jet screwed all the way closed it still idles fast. I checked the coolant level and it is completly full. I am stuck, please help.
Paul :?
Jun 11, 2007 at 8:11 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
[quote:187e79189f="al7ou"]1991 toyota
pickup
4x4
2.4L 4 cyclinder
5 speed manual trans
180k milage
no air condition

Hello, truck runs fine except at idle when warm. After warm up the truck idles fast and when brakes applied, engine surges. I checked the vacum line to the brake booster, by disconnecting but still idle is fast. I adjusted the idle speed mixture jet on top of throtle body but even with jet screwed all the way closed it still idles fast. I checked the coolant level and it is completly full. I am stuck, please help.
Paul :?[/quote:187e79189f]

Check the idle air control valve and throttle position sensor
Jun 11, 2007 at 10:35 AM
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