What you describe is a cylinder not contributing,This can be from a misfire such as a broken sparkplug wire to a broken sparkplug, If it was a vacuum leak it would lope at idle but not buck at high speed,
thank you i will check this stuff thank you for your time it is very much appreciated
ok when i stop at a light i have this lope but if i sit there for a few it will smooth out for 2 or 3 seconds then go back to loping at a constant speed it is smooth but if i try to give it a little gas it will buck like crazy but if i give it a lot it will smooth out and go like hell im sorry i didnt quite explaine it right
×
SOURCE: 96 Chevy Silveraldo, 5.7 Vortec v8. Idles fine,
I have the same problems but unlike the unleaded only guys I can switch to CNG also.
It happens when it shifts to overdrive, and then it goes to bucking and popping and you have to baby it or it will just pop real loud through the intake and just BOG DOWN.
Now I know I have a #7 injector clogged 100% or almost.
but you wouldnt think it would have to use that injector when i am running on the CNG. who knows.
My buddy told me that he had someone do something to a module of some sort that was hard wired into the tranny harness.
I will do more research on that and get back to you , simply because I am having the same problems now and I WANT THIS TO GO AWAY QUICKLY. I truly believe there is something to be said about going to the extreme pros on stuff like this (not dealerships most of the time, except for lexus) I mean the guys in the trenches, diagnostic nerds that pride themselves on solving puzzles, not the guys who are collecting a check.
I WILL FIGURE THIS ONE OUT.
SOURCE: 2004 5.3 K1500 with 46K miles.
Could be your fuel filter is plugged if you have one. My 2005 doesn't as there are filter screens in each injector. Find a buddy with a reader and go for a test ride with it plugged in. There are too many possibilities to mention
107 views
Usually answered in minutes!
×