[snguyen2688]

Help! I have a 16' at idle it reads vacuum fine but when I accelerate the boost gauge goes up to 0 and that's it. I don't hear any noises from the supercharger like others posted. Any ideas?

 

[OldMoparGuy]

Belt/pulley intact and spinning

 

[Rockster]

Is the supercharger being spun? (OldMoparGuy beat me to it...)

If it is while I'm no expert on how boost is controlled with these super charged engines I'd have to offer a WAG the boost control is not working correctly.

 

[snguyen2688]

Yes pulley and belt is there. I also removed the belt and checked if the pulley had any play, didn't find any. Did notice something in the pulley.

 

[Rockster]

Still no expert but that pulley looks like it is shot. The top pulley I think has an overrun clutch in it and if that is the case it looks like for this pulley the overrun clutch has failed.

 

[16GoManGoHC]

I can agree on the pulley, it looks like it has issue. I think the blower is just free wheeling from the engine pulling through it and making it spin. Take belt off, spin blower with pulley then spin it via the hex bolt which is directly coupled to the shaft. You may hear the blower lobes with one not the other.

 

[Spoolin]

Or there may be an issue with the boost bypass valve staying open for whatever reason.

 

[GreenMachine15]

They nailed it.
SC clutched pulley is junk and not engaging OR bypass valve is stuck open not letting SC build boost.
Take both belts off and spin the SC pulley.

It almost looks like something got wrapped into the pulley like a bag or something and jammed the clutched pulley up.
Seems odd that this could happen, but seems odd to even see plastic in there to begin with.

 

[snguyen2688]

Alright thank you I'll look into and see what I find!

 

[DGatzby]

Pulley. It is missing its dust cover. My pulley from two years ago. Failed, no boost. Same picture as yours. Seen this before.

 

[GreenMachine15]

Oh snap. Got a nice stock pulley for sale just like everyone else lol.
Likely everyone killed the dust cover taking it off.

 

[Vapor SRT]

46 here today saw 12 psi pretty consistent. good luck

 

[Red-I-Madness]

Looks like metal shaving coming out of the pully clutch. Its toast, time to replace it.

 

[ECO04]

@snguyen2688
what was the fix? same problem here?
thanks

 

[snguyen2688]

@snguyen2688
what was the fix? same problem here?
thanks

The drive pulley fixed my issue!