Thanks for the info!! I am going to get a second opinion from another shop, and I will replace all the things you told me too. Thanks soooo much!!! Margie happier vanagon owner Wolfvan88@aol.com wrote: > I have dual carbs on my 73 T4 engine. I had it smogged to see how close to legal it was. It was only about 100 parts above limit and I had no CAT installed. > > The dual carbs, setup correctly with a working CAT might be able to made to pass. > > Install: > Bosch Quad tip plugs > New cap/ rotor > change the oil > Wires, if not real old. > Change to electronic ignition- Drop in points eliminator- @$50-$70 > > Tune the Carbs. Balance and adjust the idle mixture to as lean as possible without overheating the engine > open the air by pass on each carb to futher lean it out. > Possible smaller idle jet- only @ $3 each, four needed If dual throat. > > Go smaller main jet to match venturi size. > > fix vacuum leaks if any > > install a working CAT. > > Make sure valves have .006 clearence to avoid the lifter preload issure with VW lifters. > > I could not pass emmissions and when I set the valves to -NO preload it dropped over 200 points in the HC measurement > > DO this BEFORE changing carbs, a single will rob you of power AND mileage, I know I had one on my 73 custom 2L and power was bad. > > Robert |
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