Message:
97 gmc 3/4 4wd 4.10 Codes read cyls.2and6 improper combustion. replaced injectors.still smokeing and idleing rough as you accellerate you can feel it missing untill you reach about 1900 r.p.m. Then smoke go's away! stops missing,runs right down the road like nothing wrong. Could it be valves, pluged exhust or god forbide cracked rings. I have pampered this engine with 2500mile oil changes, fram tough guard filters.air cleaner always cleaned with every oil chg. and washed every 7500mi.(K@N)filter. DOES ANYBODY HAVE AN IDEA? How about you DR. could you help? 989-785-3862
Subject: 6.5 smokeing under1900rpm
