Guest Bill_093 Posted March 7, 2017 Share Posted March 7, 2017 unplugged several vacuums and breakers and she doesn't break stride, hangs around 30 RPM and its tough stopping at a stop light. BCM? ECM? 1990 convertible reatta Link to comment Share on other sites More sharing options...
Dashmaster Posted March 8, 2017 Share Posted March 8, 2017 Bad TPS ( Throttle Position Sensor ) will do this. Not sure how you can check this on a 90 without CRT. Link to comment Share on other sites More sharing options...
harry yarnell Posted March 8, 2017 Share Posted March 8, 2017 Check PCV plumbing. Link to comment Share on other sites More sharing options...
harry yarnell Posted March 8, 2017 Share Posted March 8, 2017 Check the PCV plumbing. Link to comment Share on other sites More sharing options...
padgett Posted March 8, 2017 Share Posted March 8, 2017 3000 rpm idle should be triggering error codes. Most likely cause is a vacuum leak. Where did you work last ? Also the plastic vacuum distribution on top of the intake plenum may have broken. 1 Link to comment Share on other sites More sharing options...
KDirk Posted March 8, 2017 Share Posted March 8, 2017 ^ interesting bit of information there. I'd never thought about what that rubber cap was for, and have replaced one already. Will plan on doing this on the rest of my fleet this spring. 1 Link to comment Share on other sites More sharing options...
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