CAR is 1990, and has 12,500 miles. heard also that a shorted fuel injector solenoid a cause for rough idle. has anyone ever heard of Haibeck Auto Technology in Addison ill. ??? they are suppose to be Zr1 pros---any comments ??? taking car to local dealer thursday for check-up, they said they have a zr-1 certified mechanic.---thanks ---Greg
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