Engine Problems

[Jims86]

it runns to the air pump which is worthless

No, it has a purpose. It helps your Cat stay lit, and helps it light faster on cold start.

 

[87sierra]

No, it has a purpose. It helps your Cat stay lit, and helps it light faster on cold start.

ya but the cat i have on the truck blew all the material out into my stock muffler now i have an empty cat with a 3" in and 3" out cherybomb to a
3 1/2" pipe from a stock duramax that now exits in front of the rear tire

 

[Jims86]

must sound pretty good.

 

[87sierra]

must sound pretty good.

ya she rumbles goin down the road and it turns heads in town

 

[Jims86]

ya runs fine and the wiring is right unless u go by what chilton says and every wire should be moved back one which wont work for this truck

What is your timing set at?

 

[87sierra]

not sure as of right i will check it once i get home this weekend

 

[Jims86]

If you ever get rid of the AIR pump, I sure could use that diverter valve.

 

[87sierra]

the last time i removed the pump i couldnt get the thing ispected without it failing put once i get enough money i plan on removing the pump and makeing sure it looks like it never had a pump since the emission station are strict about that stuff

 

[Jims86]

the last time i removed the pump i couldnt get the thing ispected without it failing put once i get enough money i plan on removing the pump and makeing sure it looks like it never had a pump since the emission station are strict about that stuff

Ohhhh...I would leave it then.

 

[87sierra]

ya but the one emission guy i talked to said if i put on different manifolds or headers and removed the air pump and all the lines and covered the vaccum plug on the tbi with a cap i would be good since my truck came to PA with dual cats as a California set up but all the tech said to remove that second cat so we did