harderthansoft
Senior Member
I own a 07 GMC SIERRA CLASSIC. The book states not to use any fuel additives in the fuel. Its got close to 98000 miles and I want to add some STP injector cleaner to gas. Can anyone comment on this subject?
take off the hose from the air cleaner that goes to the throttle body and spray out the black soot around the throttle body blades with throttle body spray..
....Hold the blade open and spray inside and wipe with clean rag to get all the black soot out....
It will help off idle performance and will idle smoother...
I have had 2 F150's one got rid of at 280,000SEAFOAM !!!!!!!!!!!!!!!! I have taken one vehicle to 179000 another to 156000 another to 159000 and the current one to 154000 and still goings strong Every oil change a can in the tank never have had any issues