I have a Edelbrock 600 that had an emissions passing carbonmonoxide reading of 2.91 "Loaded" on a 3.75 standard on 02-07-04 but it read 4.32 on the same standard on 08-20-04, FAILED. The only adjustment made was to raise the idle so the car would stay on at idle. Also it is now 105 degrees in Arizona compared with 80 in February, could this be the problem? Can someone tell me what adjustment needs to be made to bring this reading down so I could pass emissions? Idle readings and Hydrocarbons both passed.
Thanks