Mr billb_093 0 Posted January 28, 2020 Share Posted January 28, 2020 Hey folks been under the weather for the last 3 years. Looking to get back into my Baby 1990 Reattta convertible. Idles around 25 cold and 30 when warm. How do I do the diagnostics on it. All the vac hoses have been changed throttle body has been cleaned as well as the MAF with MAF cleaner Link to post Share on other sites
Dave39MD 186 Posted January 29, 2020 Share Posted January 29, 2020 I can't help but there is a Reatta forum down in the Buick section you might try asking there if you don't get any response here. Glad you are doing better! Dave Link to post Share on other sites
c49er 354 Posted January 29, 2020 Share Posted January 29, 2020 Check for vacuum leaks...throttle body gasket leak? Link to post Share on other sites
edinmass 11,443 Posted February 2, 2020 Share Posted February 2, 2020 IAC could be out of calibration.......if it has one......been years since I was under the hood of a 90 Buick. Idle Air Control Motor............next to the throttle body. First check if you unplug the MAP or MAS to see if the car has computer control.....if it doesn’t, you say will go down hill. 1 Link to post Share on other sites
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