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 Big supercharger problems, I think :/.

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98RIV7777
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PostSubject: Big supercharger problems, I think :/.   Thu May 05, 2011 10:41 am

I thought my coupler was bad which I thought was odd because I replaced mine as a preventive measure about two year ago when I switched to a smaller pulley. Which I thought was wierd because I thought these new couplers were supposed to out last the originals.
There was about 70,000 miles on the car then and now i have 81,000 on it.
Well Ive been having rough idle issues for the past two days and SES light came on.
Its throwing a P0171 - System Too Lean Bank 1 Sensor 1. Stopped Driving the car. Noticed my supercharger pulley looked a little bit off center and while the cars running you can see small sparks coming from the inner side of the pulley:(
Removed the supercharger oil cap, and notice theres very little if not any oil in there. I have no idea where it went.
As soon as i removed the supercharger belt the whole snout just rocks back and forth by hand with very little pressure.I have no idea the extent of the damage or where to start with diagnosing, fixing and keeping this problem from happening again.
Any and all help is greatly appricated:/

While Im down though I think Im gonna have to just swap my Supercharger from my 98 Ultra to my riv until i get the rivs rebuilt or whatever needs to be done, my best guess is the gears are shot and im wondering if its a hard job or what to fix, I only see how to- topics of the coupler being replaced on here.....
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AA
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PostSubject: Re: Big supercharger problems, I think :/.   Thu May 05, 2011 10:55 am

I'd suspect the snout bearings need replaced. It should be making a lot of noise if that's the case. It's surprising to see that happen with so few miles - must not have had oil for a while - but not that expensive to have rebuilt. An M90 blower should last 200-300k miles with very little maintenance.

I don't think the blower is causing your P0171 lean issue - figuring that out will likely require checking the O2 and MAFF sensors are clean and working correctly. A scanner could come in handy. Also check fuel pressure at the rail.

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'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
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PostSubject: Re: Big supercharger problems, I think :/.   Thu May 05, 2011 12:58 pm

I have a scanner but im not sure what the numbers should be at to figure out what sensor is bad, they look clean but looks can be decieving... anyone know wat numbers i should be at, i know they are wrong cuz its running bad, but i dont know where to start...
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AA
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PostSubject: Re: Big supercharger problems, I think :/.   Thu May 05, 2011 1:43 pm

O2 values should be constantly moving up and down while running. It will hold steady between 800-900 at WOT.

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'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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albertj
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PostSubject: Re: Big supercharger problems, I think :/.   Thu May 05, 2011 2:26 pm

AA wrote:
O2 values should be constantly moving up and down while running. It will hold steady between 800-900 at WOT.

If you use a scan tool or scan software (such as Car-Code) you can plot a "tape" of both 02 sensors at once and see the voltage levels on the plot. Makes it easy to spot a slow or outofspec one.
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PostSubject: Re: Big supercharger problems, I think :/.   Thu May 05, 2011 9:23 pm

thanks, im going to check that tomorrow, what i found today was: having no supercharger fluid caused my gears to shread...metal shavings where all over the place. My coupler was fine so im guessing maybe the bearings just went, causing the fluid to leak out without me knowing and later causing the gears to grind and creating metal shavings:( this really suxs. Im in the middle of swaping the SC from my Ultra to the Riv, im gonna finish tomorrow. My big issue is just I really want to know what caused this so it dont happen again, Im basically assed out on a supercharger, and they arnt cheap:/ I dont know if i should try to rebuild the insides myself or ship it out or what.I think it will prolly need to be machined in the inside too...I was thinking just have it ported and polished but maybe they cant. I need some ideas and suggestions guys, please help :????
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Mr.Riviera
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PostSubject: Re: Big supercharger problems, I think :/.   Thu May 05, 2011 10:28 pm

sound to me like the outer snout bearing were bad which caused a slight movement in the pulley shaft, which reamed out the snout seal and let the oil run out the nose. No oil+ bad bearing+heat = not good.
Or the pulley wasnt put on all the way which caused stress and a wobble which reamed the snout seal...you get the picture.

You could have the old one rebuilt or you could by the one i am selling happy
its already ported and polished with a 3.4 pulley pressed on.
As for future preventative maintenance, check the oil in the S/C when you do an oil change. listen for different sound coming from the blower and make sure a pressed on pulley is aligned properly and all the way.

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black shadow
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PostSubject: Re: Big supercharger problems, I think :/.   Sat May 07, 2011 12:27 pm

I have a extra supercharger and will make you a great deal
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