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

Car Idles and dies

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Old Jun 2, 2003 | 04:25 PM
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9T4YY1's Avatar
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Default Car Idles and dies

I have a 94 with auto. Thing has started a erratic idle. While stopped the idle drops below 500 at times and has recently started cutting off. Normally it idles around 600. Previously, the idle would jump from 600-900 or more then settle down. Any ideas on what causes this, EGR maybe ?? Thanks !
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Old Jun 2, 2003 | 05:02 PM
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Default Re: Car Idles and dies (9T4YY1)

Hmmm. Idles and dies.....you're batting .500!

Could be a bazillion things. Chech easiest first. In a very dark area with engoine running (but not in a closed garage!) check for spark leaks (arcing) around plugs and wires.

When was the last time you cleaned the throttle body?
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Old Jun 2, 2003 | 05:20 PM
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Default Re: Car Idles and dies (9T4YY1)

Last time my idle jumped around from 500-900, I had to replace the opti. Does it have any missing at freeway speeds? (That would be strike two).

Do the simple "I should be doing this stuff, anyway" first. Clean the air filter, TB, IAC, check for spark corona, coil wire, water pump weep hole, vacuum leaks.

What temperature show on the digital display for coolant. If the coolant temp sensor on the front of the pump is damaged, it'll cause idle problems.
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Old Jun 2, 2003 | 06:06 PM
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Default Re: Car Idles and dies (9T4YY1)

got any codes?
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Old Jun 3, 2003 | 01:25 AM
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Default Re: Car Idles and dies (9T4YY1)

Maybe a throttle body clean up is what you need.
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Old Jun 3, 2003 | 02:40 AM
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Default Re: Car Idles and dies (BAM92)

I had a simular problem and it was an intermittent O2 sensor. Had to buy an Auto X-Ray sensor reader to find the problem. Good luck, Robert :banghead:
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Old Jun 3, 2003 | 03:58 PM
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Default Re: Car Idles and dies (9T4YY1)

Thanks, I will look into your suggestions and see what happens.
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