I OWN A 1997 CHEV. S-10 ZR-2 WITH A 4.3 V-6 (85K MILES). FOR THE LAST
3 YEARS OR MORE I HAVE NOTICED A PROBLEM WITH HESITATION AT LOWER SPEEDS UPON LIGHT ACCELLERATION. THE PROBLEM SEEMS TO OCCUR MORE WHEN IT IS COLD OUTSIDE (LIVE IN MICHIGAN) AND WHEN THE WEATHER IS DAMP/RAINY/FOGGY. THE PROBLEM ALSO SEEMS TO GO AWAY SLIGHTLY WHEN THE TRUCK HAS WARMED UP. MORE RECENTLY THE COIL WENT OUT, I THOUGHT REPLACING IT WOULD FIX THE PROBLEM I HAVE, ONLY NOW THE "SERVICE ENGINE SOON" LIGHT OCASSIONLY COMES ON. TRIED DIAGNOSIING IT WITH A COMPUTER TO NO AVAIL. I BELIEVE IT IS SOME SORT OF SENSOR PROBLEM, WHICH ONE IS BEYOND ME, AND DON?T WANT TO SPEND A FORTUNE HAVING A GM DEALER FIX ONLY TO FIND OUT IT WAS A $50 PART. ANY IDEAS? NEW FUEL FILTER AND CAT. CONVERTER IS OK.