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| Message: | I have a 86 190E 16v that I just took to the shop because it was running rough. It would load up and stutter and backfire at around 4500 rpm and when it idles it will stall. It is also realy hard to start. The shop put new plugs in and adjusted the air/fuel mixture. It ran perfect for about 200 miles and now it’s doing the same thing again? Any advice? Thanks | ||||