Cadillac Northstar Intake coupler vacuum leak and repair. 2000-04 common issue ghost codes

P0101 P0300 and all sorts of other ghost codes will be triggered by this. People will put new MAFs new plugs, coil packs, injectors and more and miss this issue. Dealers will end up with 4000 buck bills changing all the above and finally figuring it out …. Head gaskets number 1 northstar issue, this is number 2 on the 2000-2004 cars. Sideways engine Cadillacs are best never owned, but if you have one… hope this helps.

[@MichaelAguilar-vj2nr]

Nice Video. Good old Vacuum Leaks. Older Cadillac is Always Better. I have a propane mister bottle. Works great for checking out Vacuum leaks. 😊

[@jdwxflyer]

Believe it or not I had the same intake coupler problem with my ‘89 Toyota pickup.