1999 gtp 3.4 pulley supercharger problem

[gtpzzp]

hey i recently chaged my motor i have but a 3.4 inch pulley with u bend remove ,cat remove,cold air intake, and 2.5 inch exhaust and colder plugs and 180 t stat, and my problem is that went i start it its hard to start and no power boost wont go up and cuts out wen i take my supercharge belt off car runs like new but with no power of cours cusse no supercharge NEED HELP !!

[tayl5645]

Sound liek your knocking like crazy... Mods dont support that 3.4

[tayl5645]

http://www.grandprixforums.net/safel...car-17482.html

This link is going to help you a ton.. read it please

[blueguy]

^^That.

[gtpzzp]

yah i have put back my 3.8 inch stockl pulley and no change

[biggt]

if your running a 3.8 now and nothing changed

maybe you have a chipped piston?

[matt5112]

ignition issues?

[blueguy]

Check the plugs

[torq455]

Are you reading full boost on your gauge?

[chevyy1212]

Id do the compression test first off and go from there.

[gtpzzp]

no im not reading full boost som time 2 line thats it and its a motor with 90.000 km and the car runs way better without the supercharge belt it would be a chip piston it would run like **** all the time.

[blueguy]

Check for a vacuum leak? Checked the plugs yet? Have any SES lights?

[Powertrike]

Check for a vacuum leak? Checked the plugs yet? Have any SES lights?

this

[gtpinsc]

chipped piston doesnt necessarily mean ur gonna run like ****... i ran on 2 chipped pistons for almost a year with no signs of it being chipped other than broken spark plugs. check the rubber T under the snout.

[gtpzzp]

whats the rubber t under the snout and can you tell me if you know whats the sensor behind the motor betwen the motor and the trans its in and hard place to get it out ,,mine was broken and mabey thats my problem

[torq455]

Can't you have low boost with a bad, is it, boost actuator?

[Reptile]

whats the rubber t under the snout and can you tell me if you know whats the sensor behind the motor betwen the motor and the trans its in and hard place to get it out ,,mine was broken and mabey thats my problem

That is the rear knock sensor. And yeah, it can be a bear to get out.
That won't be the reason it's not reading full boost though, Either you have a bad vac leak on the lines, or the boost valve isn't closing, which gives you about 4-6 lbs of boost at most.

Some people run with only one knock sensor working for a while without even noticing it, it's important to have both working though.

[real diehl]

Holy run on sentences OP

[Lacboi]

sounds like the bbv solenoid. i just unpluged mine and boost came back

[matt5112]

You did get a new one right?