5.2 ltr ram 1500 conversion as i am driving everthings fine at first but somtimes wen i get to a stop and take off the engine is gettin to the mpours b,4 the van gets there its sounds like its surgin ,chek eng lite came on but then quik went out ,gave it atune up,cap,roter,plgs,wires,iac,cts,air filter,serp belt,all the fluid looks full no leaks