2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

1990 GXL won't idle when warm

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Old Mar 17, 2018 | 06:41 PM
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RJ TOUGE's Avatar
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1990 GXL won't idle when warm

Not sure what to do, it's an NA S5 13b with 100k miles but runs very strong, but recently its been dropping from 1k to 500 RPM to sometimes stalling while warm, but it idles fine when cold/warming up to temp. Help thanks
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Old May 26, 2020 | 09:37 PM
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Old May 27, 2020 | 09:18 AM
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Originally Posted by RJ TOUGE
Not sure what to do, it's an NA S5 13b with 100k miles but runs very strong, but recently its been dropping from 1k to 500 RPM to sometimes stalling while warm, but it idles fine when cold/warming up to temp. Help thanks
Probably the best place to start would be to check for trouble codes. Here's a link that might help you get started: 89-91 CPU Trouble Codes
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