My girlfriends 2003 cavalier ecotec keeps showing a check engine light. It is coming up with PO440 Small Emissions System Leak. I clear it out and its good for a day or two and then it's back on again. I have replaced the fuel cap to no avail. Is there anything on these that is common in the evap system that is most likely the culprit? Thanks in advance.

The plastic hose that goes from the top of the intake manifold to the evap purge valve thing on the side of the Power steering pump can leak causing that code. just go at autozone or where ever and pick up a vacuum line to replace that for like $2.

another thing is off that same vacuum coming off the intake manifold mine kinda broke (from leaning on it for my header install) and i just superglued it back on wich also worked in removed the code.

OhForKavy wrote:

J03Y wrote:poor people do that

I hate to break it to ya..but a lot of people on this site aren't in the wealthy bracket. If we were, we prolly wouldn't have j-bodies