2005 cobalt SS/SC bought it used a year ago stage 2 supercharge and A++ clutch or around that not completely sure !

Anyways the problem ill explain to the best of my ability !

Car starts fine runs fine ! no check engine lights ! But it seems to be getting no boost from the supercharge ! I still get high boost on the gauge , I will start in first rev to 4ish shift 2nd and it seems to hesitate the rpm will go down then back up ... the butterfly valve seems to be fine ! opens and closes ! cleaned my intake ! Any Ideas ?!?! I can get a video if this sounds confusing !

 

are you on the stock downpipe?

 

I believe so ! I have stock exhaust so Im guessing downpipe is the same !

 

All these ! marks are freaking me out!!!!!!








!!!!

 

idk but it could be clauged cat since you see boost but the car doesnt go anywhere..

 

x2
do you hear any sort of a rattle? or does your boost go higher than it is supposed to?

 

Umm cat was changed last year by GM under warranty, ummm The boost could go higher then its supposed to ?

 

if your cat is claugged the yes, you'll see boost go higher than normal and feel less or no power. do you have an afr gauge?

 

nope , and The cat should not be pluged again already would it ! it was last summer it "was changed " by GM , And The car seems to have normal power just none from supercharge

 

That Check engine light has come on before tho .. Something like air / fuel ratio I think ?

 

i dont get it.

 

yes, with a afr gauge you can monitor if theres something wrong with your car and also with a incerceptor gauge. If you do have an check engine light, have it scanned and we can work from there

 

Ill post a Video ! Like the car works fine but when the supercharge gauge passes 0 its gutless for a little , It goes to about 90 kpa , It kinda feels like the bands slip then catches ! bare with me here I only know basic mechanics .

Check engine light has came on but went off on its own , Ive scanned it and it was to do with air/fuel ratio .

Im stumped ! Ill just try and get a video maybe you can understand better

http://www.facebook.com/photo.php?v=...type=2&theater (video )

 

Update *

 

theres many things that are simple to check, but you should deff have the code scanned so we dont do a million other things before we get to the actual problem.

but check your plugs too and see if theres anything unusual? the video only shows how you get a vtech like reaction from the car on open throttle haha

 

Yeah Just though you could notice the hesitation , And the check engine light isnt on anymore it went out awhile ago and hasnt came back on

 

That code is probably still stored in the computer.....go get it scanned!

 

Please for the love of god it's supercharger not supercharg! Hesitation could be spark blowing out. Could be clogged cat. Mine does that sometimes. I need to adjust my pe mode.

 

Check the boost bypass solenoid too.

 

Error codes
P0171
P0103

Gm told me nothing besides what I already knew , They told me I could leave it there and they could spend some hours and "maybe" find out whats wrong ....

Took Injen intake out looks clean . tightened all hoses checked for leaks . Supercharger looked clean only question is . When I took the intake off to look in the supercharger the valve or whatever you would call it that opens and closes wasnt all the way closed ? and there looked like grease inside ? Not sure if thats normal .

Only last guess is the maf sensor , Friend said a cracked manafold would just give it bad gas milage .. Again forgive me for my grammer im sure its confusing just work with me , All the advice is very helpful

According to gm
Cat is good
boost bypass solenoid is good

That would have been nice to have noticed ... I didnt know it stored the codes , cost me 85$ from gm it was a good F***in for 10 mins of work haha

 

Dude autozone scans your car for free, not sure about other places like advance or oreilys, but they probably do too

 

Try cleaning your maf sensor. Take it out and clean it with maf cleaner, let it dry and then install.

 

Would electrical cleaner be the same ?

 

id say its the throtle body giving a ****. these cars throttle bodys go out eventually ive changed too my self since ive owned my car back from 07. i think its supposed to close all the way

 

Yeah it seems to be bad throttle response , Can anyone verify that the throttal body should be fully closed when car is off ?