rough cold start idle and rough running
#1
rough cold start idle and rough running
i know im probably reposting this for the umpteenth time. but i have an issue with my 4.3L 2wd running rough at idle and at first accelleration after sitting for a few hours. im thinking egr valve. any ideas?
#5
no. and ive already scanned it for stored DTC's Im a auto tech for a living but i work on VW's so im kind of at a loss here. love blazers and love chevys but all my training is in vw wat different systems.
#8
running hot doesnt sound good,mine did the same thing and i found out the head was cracked.you could try to pressure test the cooling system that should tell you if the head is cracked.i would also run a compression check on the cylinders.
#9
that was all done last year when i replaced the intake manifold gasket that blew. tested good. it just started running a bit warm like 240 or so. ac is bad too but oh well. ill check into it tomorrow i hope we have a pressure tester at work that will fit my truck
#10
ok no water leak didnt pressure test it but it hasnt run hot in a few days and its been scorching hot round here. and the rough start is a clogged EGR valve cleaned it with carb cleaner problem was fixed for a day or so but the valve is still sticking. and the truck is running rich as heck. yunkyard here i come!!!!!.