Does it not display boost or is it not making boost? Does it pull as hard as it did before?

 

Going back reading your post again I seen that you said it runs and feels like it did before and your BOV was blowing off so this leads me to believe now that your gauge is malfunctioning.

 

I wish it was that simple Pete, but the car is definitely lacking the power it had before this happened. It runs and drives great besides when I go WOT. There's definitely a loss of power.

And sonic, it's not displaying boost and not making boost.

 

The issue has to be with your BOV or an intercooler coupler that has blown off. Take the bumper off and check all of them, sometimes they look right but aren't If the compressor were messed up bad enough to be making 0 boost, it would be making some catastrophic noises.

 

I thought you said the car runs and drives like it did before? Anyhow if that's not the case as suggested it is either the BOV not working or it is a blown off coupler. Look at the BOV really close and see if the vacuum line has came loose or if there is a hole in the diaphragm which will require removal.

 

By runs and drives like it did before, I meant without getting into boost. I can fart around town all day long just fine, but it won't go into boost. Would the bov function fine even if there's a tiny hole in the diaphragm?

 

No if it has a hole it cannot maintain the seal it need to operate properly.

 

But it sounds like its opening and closing fine.

 

Take it out and inspector after you ensure every coupler is sealing properly.

---------- Post added at 11:23 AM ---------- Previous post was at 11:18 AM ----------



Take it out and inspector after you ensure every coupler is sealing properly.

 

I checked the bov and everything is good on it. Car still won't make boost. I'm out of ideas.

 

Did you check all your couplers?


Sent from ??nbj vyx6,;dtzy could have u. Ovh77,????

 

Yep, all are in good shape.

 

well **** Son you got some secret messed up crap going on. If your gauge is working,your BOV is working and all your Couplers are coupled, and your belt is on the blower nice and snug then youve got an issue with your blower. what do you have on the inlet side? can you put up an idle video i want to see your system.

 

Inlet side? I guess you can call it a shortened power pipe. I'll put an idle video up tomorrow.

 

I know you said you checked the blow off valve, but when you say checked did you hook it up without being in the car and see it opening/closing. It could be that the diaphragm is ripped and it's not allowing it to close all of the way.

 

I took the tial apart and inspected it, no tears or anything. It sounds like it's operating like it should.

 

OP, how much boost are you making? Still stock PI intake?

Sometimes people blow holes in them, but it normally happens around 15psi and I think it causes major drivability issues.

 

Before this happened the dyno sheet says about 7-8psi, but on my shitty glowshift gauge I've only seen around 6psi. 375whp.

 

You didn't blow a hole in the intake with that low of boost.

Have you taken off the air filter and looked at the supercharger impeller yet? If it were damaged perhaps it could cause you issues. But I feel like if the impeller got hurt, it would make such a violent noise that you would hear it. It would also probably seize the blower.

Also check your boost gauge where it runs through the firewall. My friend has that same Glowshift gauge, and his vac line likes pinch shut there.

 

Have you done a boost leak test, and seen if you have any massive leaks, you might just not be seeing?

 

I've tried pressurizing the intake system, my buddy and I can't hear any air escaping and theres a good amount of pressure build up in the inlet of the blower.

---------- Post added at 10:13 AM ---------- Previous post was at 10:10 AM ----------

And flyboy, the impeller looks fine. No oil or anything anywhere inside. The boost guage vac line wouldn't make my car run slow would it? Doesn't seem like it would.

 

No it would not affect the performance. I forgot you said it was sluggish at WOT.

Pull off the bumper and look at your intercooler. Maybe you knocked a hole in it? Somehow that massive volume of air is escaping and the car is running like it's NA. It has to be through a pretty big hole.

 

This is very weird.

1) belt is spinning supercharger right? There is no belt slip, and pulley on supercharger is tight right? Supercharger has no shaft play.
2) filter on supercharger is clean, not clogged right?
3) all cold air tubing is connected properly, and there is no debris inside intercooler
4) all vacuum hoses in bov and throttle body are intact, and not clogged.
5) BOV is not stuck open.
6) There are no cracks in intake manifold.
7) You didnt blow an intake manifold gasket

If all of the above is correct, then you should definitely be making boost.

 

There's the average bugs on the intercooler, but not nearly enough that it would stop air from flowing into it. EVerything you said is correct. I'm wondering if it's something internal that I cannot hear. Hope not.

 

I mean the inside of the intercooler. The outside is just for air flow to cool it down.

 

If he had a boost leak he would be running rich, and running rough especially if he is blow thru.

 

Thats what im thinking. If he had a boost leak it would be running terribly.

Unless its a leak before the maf

 

what you are describing sounds like you are running NA now for sure; especially if at WOT its sluggish. it's probably running too much fuel for not enough air?

this sorta happened to me. i was testing out my MT ET Streets from a dig and launched it and a coupler popped off. You never mentioned the noise though. for me, when i popped a coupler, you could hear the blower a lot more b/c it wasn't an enclosed system anymore plus i was getting unfiltered air in the intake.... however my bov wasn't working at that point either as the location of the coupler popping off was after the IC.

i would triple check each coupler and t-clamp to make sure everything is secure. on top of that i would check any and all other vacuum lines.

is your bov tied into any other vacuum lines or if it by itself? what about the boost gauge?

 

Couplers and clamps are all good. Could I take the intercooler off and run a straight pipe in there to test it out?

Filmman the bov is teed in to the front of the plenum where the red lines go in. Never had a problem with it before. The gauge is a glowshift gauge, it worked fine up until my car wont boost anymore, it still reads vacuum but never gets into the boost numbers.

 

Couplers and clamps are all good. Could I take the intercooler off and run a straight pipe in there to test it out?

Filmman the bov is teed in to the front of the plenum where the red lines go in. Never had a problem with it before. The gauge is a glowshift gauge, it worked fine up until my car wont boost anymore, it still reads vacuum but never gets into the boost numbers.

Gotcha. Mine had issues if the BOV wasn't on its own vac line lol

It's also crazy that your gauge is showing vacuum (in/hg) but doesn't show you in boost, I've never seen that before. Also you are experiencing a performance hit.

Something isn't right and it doesn't seem like a simple fix now

 

Yeah the car feels pretty much N/A.