Help with supercharger...

[ka0tyk]

this is just a general question about some supercharger problems a girl friend of mine is having on her ati procharged mustang...

her mustang is currently supercharged and running about 11 pound of boost and intercooled. However it has a HORRIBLE screeching/chriping sound comming from the supercharger itself ever since it was installed... I recently took a look and noticed that the piping wasnt even connected so it was just blowing air into the fender... woo! SO I hooked that back up. Also I noticed that the bypass valve is beyond impossible to move when the car is on. Isnt it supposed to be open when the car is at idle, basically allowing the supercharger to keep the intake pressurized but blowing back around into the intake side of the supercharger? Right now it doesnt even move... sometimes when you take your foot off the gas, the idle drops REALLY low... as if its sticking shut. Also when you turn the car off, you can hear all of her vacuum lines leaking and then the supercharger squeals as if the air is comming back out of hte system thru it... is the supercharger damaged and is there any way to see if it is damaged without removing anything serious? Removing the unit from the car isnt an issue, but I dont feel comfortable removing any of the covers off of it... also at idle the tensioner pulley bounces around, as if the supercharger is constantly "on off on off"...

thank you for ANY help you could provide...

 

[Rick 91GT]

What year is the car?

I installed a kit on a 03 and noticed the tensioner jumper around a good bit but I found there was nothing I could do about it, I made sure the blower was square to the motor etc...

The ATI has a very loud squeal/marbling sound as it idles and I do believe the blow off valve bleeds a small amount of ari off at idle, if you smack the throttle and bring it into boost does the valve open and close, you should hear it and you should be able to feel the air (it will sounds like all the import turbo cars)...if not something is wrong with the valve.

Check the vac line going to the valve, make sure it has a good source, nice clean un-crimped path.

If the idle is jumping around a lot, check all the tubing connections it sounds like one is loose and you have a vac leak, I have blown the tubes off after intial install even when I thought I had the pipes tight.

 

[ka0tyk]

its actually on a 1996 v6 mustang... I however own a 5.0 so I posted it in here... I checked the vacuum line running to the valve and even put hoseclamps on all of the vacuum lines to make sure its not leaking. However when the car is idling, the bypass valve is VERY difficult to operate even by hand grabbing it and trying to open and close it... when the car is off its smooth...

I've heard that ATI's are quite noisy but this thing squeals, chrips, etc etc... but ONLY at idle... while its running on the highway and such it sounds very nice and smooth, no problems whatsoever... its only idle. The thing I fear is that the bypass valve was screwed up a long time ago and now the supercharger itself has been damaged because of it...

 

[Rick 91GT]

The stock ATI blowoff valves are cheap IMO, but it should be easy to work by hand..I'd start there

 

[lvmustanggt]

can you put hks super sequential BOV on supercharger ? I love the sound it make . Turbo is too expensive for me so I have to settle with supercharger down the road. Will it work ? I love hks super sequential cause it make like 4 sounds su su su sususususu

Check this guys out, does supra HKS Super sequential BOV
http://videos.streetfire.net/video/5fe68561-befe-4ea3-8099-981b012bd6c5.htm

 

[prochargedfox]

I would get a new bypass valve for it. You wont lose much money even if thats not the problem. Check all of the vac. lines and make sure there is no leaks. You will lose hp and it will most likely run worse w/ leaky vac lines. Maybe check the idle screw. It may have shaken loose and not allowing much air into the intake at idle.

How does the car idle? Does it run bad? Is the noise the only problem? My procharger wistled very loud at idle. The car would also surge like it had a cam. Prochargers are pretty noisy. If the car isnt tuned, maybe you should have that done. That way the shop that tunes it may find the problem.

Good luck.

 

[lvmustanggt]

can you put hks super sequential BOV on supercharger ? I love the sound it make . Turbo is too expensive for me so I have to settle with supercharger down the road. Will it work ? I love hks super sequential cause it make like 4 sounds su su su sususususu

Check this guys out, does supra HKS Super sequential BOV
http://videos.streetfire.net/video/5fe68561-befe-4ea3-8099-981b012bd6c5.htm

Any one will like to answer me