cobaltss5speed

I recent put on a 2.8 pulley and intake around feb. I was driving yesterday around 70mph in 5th, dropped it in 4th and noticed i had no power no power at all, had to put 8th of throttle to keep it going, when i tried to put more throttle there was no increase in rpms. I am hearing a hissing sound when i am driving around 3500 rpm and up. The boost gauge is still showing i am getting boost but appearently im not getting boost at all from the supercharger. when i put the pulley on i could go thru the tires thru half of 2nd and cant even go thru the tires at 1st now, so theres something wrong can anyone help me out?

nizzle

iTrader: (7)

check bpv, did you put bigger injectors too? you get tuned?

Chevycobaltss3

iTrader: (2)

Or look at cluster to see if it says u have a issue

cobaltss5speed

Ill check the bpv, and i didnt get new injectors i just know it was the biggest size i can go without getting injectors, and nope not tuned yet i need to if i can fix it

gwatson650

You need 60lb injectors for a 2.8

cobaltss5speed

Whats the cluster, the guage? and sorry it is a 2.6*

nizzle

iTrader: (7)

You ABSOLUTELY need bigger injectors with a 2.8 & you NEED a tune as well with those mods. 2.8 is a BIG drop from factory size. I would suggest at least one cooling mod with a 2.8 and 60's as well. Do not attempt anymore hard pulls until you have upgraded your injectors and got a tune. Otherwise you will be making even more repairs/upgrades.

nizzle

iTrader: (7)

2.6!?!?! WOW bro. Dont grenade your motor.

cobaltss5speed

My brother installed it, he said its the biggest you can go without needing fuel injectors or a tune, but still i dont know why its acting like that

Bl4des

iTrader: (4)

you need injectors and a tune for any pulley smaller then stock

cobaltss5speed

Thats not good, hope i didnt mess anything up

Bl4des

iTrader: (4)

get that pulley off or get injectors and a tune and it sounds like you might have messed something up already

cobaltss5speed

alright im taking it to chevy tommarow to have them look at it, hope they see something, im pretty sure it might be a boost leakage cuz of that hissing sound, a different sound from the scharger, but ya im gunna need to do the tune and injectors no matter what

Hockeyman

iTrader: (4)

You're running out of fuel. The dealership is not going to be kind if you have a 2.6 on there, they will prob send you home and make you pay a diagnostics fee.

Chevycobaltss3

iTrader: (2)

Wtf dont take advice from ure bro anymore. Do a compression check also see if ure is pump is working

nizzle

iTrader: (7)

2.6 is the smallest you can put on PERIOD. I would not even recommend 2.6 with mods. Maybe a 2.7 but more realistically a 2.8 would be best on a stock m62 supercharger.

cobaltss5speed

it was a 3.25 to be EXACT, i took it in the dealership and some part broke in the supercharger and it was under warranty some im getting it fixed

Nabes07SS

I'm surprised they warrantied it with that smaller pulley on there. You absolutly need bigger injectors on that thing. Smaller pulley = more air....which means you also need more fuel to even out the mixture. I wouldn't put anything smaller than a 2.8 on the stock m62. GET INJECTORS AND A TUNE NOW!!