icanfixall
Official GMM hand model
As some have read, I felt I was having a fuel delievery valve issue. I had an idle stumble or slight miss. none of the injecters showed any change when I cracked them open during run time. So talking with several pump people in the know I got the suggestion to change out the pumps and see if the miss was still there instead of opening the pump. Good idea but wonder why I couldn't think of that... Doona know.. Well I got the pump off and the other pump installed Saturday but no test drive till today... Big change. Its been a long time since the truck ran that well. I hear the engine running but can't feel it. Its an interesting sound and feel. So now I take apart my pump and replace the fuel delievery valve. BTW they are differant sizes of those valves. Its not a one size fits all. Just glad I found the issue. I also got 5 worn out injecters from a shop I used to deal with years ago. Sadly about 2 years ago I asked same shop for some old injecters but I was a couple of weeks late. They just threw out 2 5 gallons buckets full of them..... I missed a deal there..