I've got an 08 Cobalt non ss, 2.2 lt manual trans. Ever since installing an aftermarket intake I've…

Dolos

I've got an 08 Cobalt non ss, 2.2 lt manual trans. Ever since installing an aftermarket intake I've been throwing a code for bank one vacuum. I thought it was my throttle body so I replaced it after screwing it up trying to clean it. Then I thought it was my hose running from the intake tube to the air pump so I had to piece together a coupling and hose to have the reach needed to connect to the tube without crimping the factory hose (there's a tight seal). That still didn't correct the issue. Beings the intake tube is aftermarket, the maf sensor didn't exactly create the tightest seal on the tube so I used some thin foam board to cut out a "gasket" hoping to seal any gaps up. Still, issue persists. I've found that the cel pops up after using the ac or heat usually. I'm not familiar with the car on a technical level. Idk what to check or how to check it. Any insight guys/ladies? Also, there's a hesitation in throttle until I get up to about 3k then she wants to take off. I've swapped the plugs about 7 months ago and they were gapped properly. My gut tells me it's got to be the a/f getting jacked up somewhere.

Comments (2)
No. 1-2
Techsus
Techsus

Quoting Scotty fan Philstuf: "I worked at a dealership and 95% (plus) of the driveability issues I ever addressed were from non-OEM parts on tune-ups."Like you, I have to profess, OEM may SEEM a premium, but those engineers MAY ACTUALLY know what they are doing, designing engines, intakes and computer systems. Cost over time is SO much lower. I have YET to go wrong with OEM ignition parts, fuel parts, or hard items (Camshaft, lifters, plugs, clutch cylinders, emissions, etc).Please know, that once I got out of my 'teens, I learned the value of OEM, and why "less expensive" is more often "cheap."Tell it from the mountain, brother!   Confucius say, "Buy cheap, pay twice."

Scotty Kilmer
Scotty Kilmer

Editor

I would go back to the stock manifold