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I love Cin
91 Turbo MR2
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Idle fluctuation in an MR2 is typically from air in the coolatn system.

Have you checked codes yet?
If you are getting a "check engine light" there will be a code stored.

See here:
http://www.mr2-tech.com/bgb/mechanical/volume1/efi_system.htm

Click on Diagnosis System
Where it says to use "SST" to conenct the terminals ... any piece of wire OR paperclip will work.
 
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