I have a 1999 Tahoe and I keep getting code misfire on cylinder #4. I have replaced spark plugs and wires and still there. Someone was telling me that it could be a injector. Does that sound like a possibility to yall and if so does the whole spider injection have to be replaced or can I do one injector. I have done all the Sea Foam, injector cleaner, ect. Symtoms are: At a idle it runs really rough, give it just a couple hundered rpms and it smooths out. Driving down the road its smooth no roughness what so ever. Just cannot stand that idle its driving me crazy. Thanks in advance for any information.

 

No one knows anything about the injection system in these vehicles?

 

I guess i am in the wrong forum will try to get some information eleswhere