Supercharger issues

I recently bought a 1997 Grand Prix GTP with 85,000 miles on it. Within a few weeks, it began to screw up. It idles very rough, feels like it's misfiring at low speed, and there is a rattling sound in the engine. I took it into a mechanic who said that the rattling is coming from the supercharger and that is the source of all of my problems. He did a compression test on my engine and couldn't find any other problems.

After reading some forum discussions about supercharger issues, I decided to try taking the supercharger belt off to see if that would fix anything, but no luck. Same rough idle. Anyone have any advice? I just want to make sure that it is only the supercharger before I put all that money into getting a new one. Thanks!

How bout starting out w/ a tune up.

new plugs
new wires
air filter
pvc
fuel filter

That was the first thing I did. It did nothing.

I recently bought a 1997 Grand Prix GTP with 85,000 miles on it. Within a few weeks, it began to screw up. It idles very rough, feels like it's misfiring at low speed, and there is a rattling sound in the engine. I took it into a mechanic who said that the rattling is coming from the supercharger and that is the source of all of my problems. He did a compression test on my engine and couldn't find any other problems.

After reading some forum discussions about supercharger issues, I decided to try taking the supercharger belt off to see if that would fix anything, but no luck. Same rough idle. Anyone have any advice? I just want to make sure that it is only the supercharger before I put all that money into getting a new one. Thanks!

I think your going to find that the noise is the coupler in the super charger.
http://www.zzperformance.com/products1.php?id=155&PHPSESSID=45c517960e57d5a1aeea5b0622dd8dc8

I'd take the car down and have it scanned, Auto Zone does it for free. Find out what codes your bring up. If not, get all the money you have and stand back and throw it at your car.
Also you don't have to replace supercharger. You can replace nose drive for around $300.00. A new SC will run you around $1500.00.
Keep us informed. Good luck.

Dont let kid scare you. You can get a complete low miles blower off the www.clubgp.com classifieds from 300 - 500 bux

Used or second hand parts are like a box of chocolates, you never know what you're going to get. IMO here's the best deal around for a new Eaton M90 Gen3 supercharger for a '97 - '03 GP GTP.

http://www.zzperformance.com/products1.php?id=376&PHPSESSID=2bf443e49617afd8b74e717c70fd8d1e


http://i5.photobucket.com/albums/y186/lizzywiz/gtp.jpg
Thrasher CAI, DHP v1.0 PCM,
3.25 SC pulley, CAIT GMAF, Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 TB,
TB spacer, MSD 8.5mm wires, Autolite 104s,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials