Hey GUY'S anyone have any knowledge about a 1997 dodge caravan ? 3.3 I start the van everything runs great idle is perfect, but when I step on the gas it hesitates and sometimes backfires through the intake !!! Oh the van has 87,000 miles not sure when if ever the plugs have been done, i have owned the van since about 10 yrs, and my wife only puts about 5k in a yr... Please help any info GREATLY APPRECIATED !!!!!!