No brakes in the morning. It will definitely wake you up more than coffee.

[WyrTwister]

Check to see if the TB and every thing is secure . I think maybe the small hose may supply filtered air ( before it reaches the MAF sensor , to the engine . If so , that air circulates through the engine , purging fumes from the engine & is in turn pullet out through the PCV valve and into the intake manifold . All other air should be measured / sensed by the MAF sensor before it enters the throttle body .

If you have a air leak past the MAF , it is called Pirate Air , since it is not measured / sensed by the MAF & the computer does not " know " about it . This messes up the air fuel mixture , which the O2 sensor should pick up . The computer tweaks the idle air control valve and the air fuel mixture to try to correct , based on the info / data from the O2 sensors .

Or , something along these lines .

Check any electrical connectors on the IAC valve & TB . And any other parts that were disturbed .

How many miles did you say you had on the car ? Does sound like you are rebuilding the car 1 part at a time .

Ours is a 2015 Sonic . I hope , long term , it has fewer issues than the AVEOs .

God bless
Wyr

PS Check the hose clamps on the duct and any others you see . Check to see if any duct or hose has slid off its respective connector . Or sensor .

[jamesd]

Check to see if the TB and every thing is secure . I think maybe the small hose may supply filtered air ( before it reaches the MAF sensor , to the engine . If so , that air circulates through the engine , purging fumes from the engine & is in turn pullet out through the PCV valve and into the intake manifold . All other air should be measured / sensed by the MAF sensor before it enters the throttle body .

If you have a air leak past the MAF , it is called Pirate Air , since it is not measured / sensed by the MAF & the computer does not " know " about it . This messes up the air fuel mixture , which the O2 sensor should pick up . The computer tweaks the idle air control valve and the air fuel mixture to try to correct , based on the info / data from the O2 sensors .

Or , something along these lines .

Check any electrical connectors on the IAC valve & TB . And any other parts that were disturbed .

How many miles did you say you had on the car ? Does sound like you are rebuilding the car 1 part at a time .

Ours is a 2015 Sonic . I hope , long term , it has fewer issues than the AVEOs .

God bless
Wyr

PS Check the hose clamps on the duct and any others you see . Check to see if any duct or hose has slid off its respective connector . Or sensor .

The Aveo has 166k on it so it does need a little tender loving care. Body of the car is intact and no rust but then again here where I live we never get snow. Well we did once back in 2005 for about an hour. lol.. If I don't find any leaks with the propane torch then it's time to build my own smoke machine!

[xintersecty]

The Aveo has 166k on it so it does need a little tender loving care. Body of the car is intact and no rust but then again here where I live we never get snow. Well we did once back in 2005 for about an hour. lol.. If I don't find any leaks with the propane torch then it's time to build my own smoke machine!

Jamie, did you put a gauge near the booster? And tried breaking when cold? You don't have to be moving just see if it maintains the same vacuum as a warm setup.

[jamesd]

Jamie, did you put a gauge near the booster? And tried breaking when cold? You don't have to be moving just see if it maintains the same vacuum as a warm setup.

No I haven't yet. I don't get home until 8pm so by then it's dark to see what I am doing. I am hoping to do that with what little light there is in the evening.

[WyrTwister]

No I haven't yet. I don't get home until 8pm so by then it's dark to see what I am doing. I am hoping to do that with what little light there is in the evening.

I used one of these , working on the plumbing , under the house . It proved worth the modest investment . Might help you , working at twilight ?

3 Watt LED Rechargeable Cordless Spotlight

God bless
Wyr

[jamesd]

I read your mind but didn't see your post until now. I picked one up form Walmart that almost like the one from Harbor Freight. It's Stanley rechargeable with LED and was $20. Mine didn't even come with a home charger. Just a auto charger. I could have saved myself some money by going to HB but a really nasty storm rolled in last night. There were even reports of hail in some areas but didn't hit my area. Aveo is safe and sound lol.. Needless to say I didn't work on the Aveo last night. My hoses should be coming in later on today. But before I replace them out I would like to take another crack on searching that leak. I almost done making my home made smoke machine too. Basically it's a paint bucket with a lid, mineral oil, candle wick and with a heated wire around it. Uses 12 volts to operate and of course compressed air. I put it all together last night during the storm.

[jamesd]

The little Aveo I am working on... and yes, it has red painted calipers and drums. lol..