1st Gen Supercharger help

Are these two supposed to be connected or capped?

 

The one by the throttle body should be capped. I have a pic in my build somewhere that shows there’s I think 3 ports that should be capped depending on your vacuum routing.

 

The one on the supercharger? Bottom or top?

 

v6 right?

That bottom one looks like a vacuum diaphragm. Is your truck EGR equipped?

 

Yes the one on the s/c. Is your truck a Cali spec? Routing is going to vary.

 

V6
Not EGR equipped

 

Yep connect those two. The two capped at the factory are because you don't have EGR.

 

I guess you can take these for whatever it’s worth. Disregard my markings

 

Yup. Those lines are capped because they’re for EGR valve equipped trucks.

 

Thank you all for the help. I was getting a p0171 code, still getting it. My LTFT is 35%. Thought it might be my vacuum routing. I bought the urd 7th injector kit (havent installed it yet) and thinking about getting rid of the K&n CAI and going back to stock air box. Thoughts?

 

P0171 is a tough code to deal with.

You have a K&N? I have one too and I got that code. Turns out the MAF was oily and causing the code.

Pull the MAF out and if it looks black or oily then that’s causing your code. Don’t use carb cleaner, use specific MAF spray as to not damage it.

I sprayed it and it went away.

 

The CAI wouldn’t be the issue, however I’d recommend going back to stock box anyways. There’s still an issue with your routing then. Is the port underneath the L bracket capped too?

 

I'll do that now.

Port underneath the L bracket?

 

That elbow looking thing at the right rear of the s/c. People miss that port that’s there.

 

I wouldn’t even mess with the MAF. 95% of the time w/ a s/c the code is thrown for vacuum leak. @eon_blue also had this issue, as did I. Make sure the routing is correct.

 

Ok good. You are routing that to a boost gauge or?

 

Yeah I had a p0171 from a loose/missing cap where the EGR plugs in to the back of the blower.

 

No that is routing to...

No idea what that black round thing is at the back that it is routing to but that was already like that on the supercharger when I installed it.