marywilliams79

Cobalt Hissing and Fuel Consumption

I'm tearing my hair out! I've got a 2018 Chevy Cobalt with a gasoline engine. Fuel consumption has gone through the roof, the check engine light is on, and there's a hissing sound when I accelerate. I'm guessing it's an air intake leak. Anyone else had similar issues?

A 2018 Chevy Cobalt owner experienced increased fuel consumption, a check engine light, and a hissing sound during acceleration, suspecting an air intake leak. Another person suggested checking vacuum hoses, particularly the intake hose, as a similar issue was resolved by fixing a split hose near the engine block. The owner confirmed the problem was a split intake hose, which was professionally repaired, resolving the issues.

Did this summary help you solve your problem?

4 comment(s)

Sounds familiar. I had something similar happen on my Cobalt. Check all your vacuum hoses, especially the intake hose. Is the hissing definitely related to acceleration? Does it change with engine load?

Good shout on the intake hose! Where exactly was the leak on yours? I've had a quick look around, but can't pinpoint it. It definitely gets louder when I put my foot down, and the car feels sluggish. Could a dodgy air filter cause this too?

For me the intake hose had a split on the underside, near the engine block, that was hard to spot. Get it checked out professionally. A split hose will impact fuel economy, cause that hissing and trigger a check engine light. I went to my local mechanic and they sorted it in an hour.

Thanks a lot! Took your advice and got it checked at a workshop. You nailed it – a split intake hose! Cost me about 100€ to get it replaced, but the hissing is gone, the check engine light is off, and my fuel economy is back to normal. Legend!

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

CHEVROLET

community_crosslink_rmh_model

COBALT