C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

high idle at start up

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Old Aug 3, 2011 | 04:58 PM
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skip myles's Avatar
skip myles
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Default high idle at start up

ok have checked everything twice vacum timing tps iac all is set but when i come home and crank it runs about 900 to 950 after maybe a 2 to 3 min it starts climbing runs from1300to 1500 doesnt go down till i shut car off then recrank it idles at 650 whats left to check
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Old Aug 3, 2011 | 05:16 PM
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From: Bowling Green Ky
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Originally Posted by skip myles
ok have checked everything twice vacum timing tps iac all is set but when i come home and crank it runs about 900 to 950 after maybe a 2 to 3 min it starts climbing runs from1300to 1500 doesnt go down till i shut car off then recrank it idles at 650 whats left to check
what year? unhook TPS to see if it makes a difference. ecm should set a default setting, if I read the book right.
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Old Aug 3, 2011 | 09:10 PM
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skip myles
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Originally Posted by stoydido
what year? unhook TPS to see if it makes a difference. ecm should set a default setting, if I read the book right.
will try that its unbelievable one min it runs great next its all over the scale
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