my 92 VW passat CL runs well when cold, but as soon as it warms up, the idle gets rough and it has an occasional miss while driving (constant but not consistent).........what could it be?
Country: United StatesMake: VolkswagenModel: Passat CLYear: 1992Engine: 2.0L Already Tried: replaced the egr valve (nearly $400 for the part)....it started when being smogged, the tech said the valve wasn't working, put a test pump on it (vacuum), pumped it a coupld of times and the idle went south. that's when I replaced the valve, but it did not help