I have a 2005 GMC Canyon, and I am experiencing exhaust or fuel fumes in the cab

malconater

If I remove the air filter the problem stops. Please help.....

ray80

What Air filter was removed, engine or cabin?

malconater

engine

ray80

While you wait for someone thats might actually know what it may be, I might wonder about stuck open PCV valve or something like that (if so equipped)

malconater

I have a PCV hose but I do not see a valve.

ray80

It would be on valve cover side. How does that air filter look BTW?

malconater

The air filter looked okay, I left it out and and made sure everything from the air filter to the Throttle body was correct and tight, and the problem stopped. I then installed a new air filter and the problem returned.

ray80

We will have to wait for someone that knows more then I do, but while we do what engine and how many miles on it (may help )

malconater

It is a 4 Cylinder, 5 Speed, nearing a hundred thousand miles.

malconater

and Thank you ray80

elias

can you hear any louder exhaust noise than before ,consistent with cracked exhaust manifold? i'm 84% sure that you can safely do a test run safely with the PVC hose blocked with a pencil or whatever is right size to block it. also consider check the charcoal/evap system, could there be a loose/cracked hose there actually the cause? have you looked for any stored/silent OBD codes?

malconater

Thank you all for your input on this problem. I appreciate all of your fine suggestions........ Here is what it was, and it took under 10 minutes to complete this task..............There is a hollow plastic enclosure that connects the air filter to the throttle body located on top of the engine, it is what you see when you open the hood. I needed a screw driver and a 10mm socket with extension to remove it. Under it was a rotted and cracked hose that goes from the bottom of the plastic enclosure to the top of the engine with no clamps or fasteners holding it in place. I found that it is called a PVC hose. No auto parts store carried or could order it. I had to order it from a dealer. I replaced the hose and re-installed the air filter and it has eliminated the problem, I did this about a week ago and the problem has not re-occurred. ......

stever

Terrific! Thanks for reporting back.