2 small problems. any ideas?

[MustangChris]

Hey all,

I have 2 small problems...

#1 my MIL keeps coming on and off. I had a shop look at the codes and they said it was my O2s, so I replaced all 4. Now its back on.

I ran the codes with my SCT Live wire and I belive it was code P1004? I forget the code, but I googled it and it is the Exhaust Gas Valve Canister? Some of the sites said it was a carbon (coal) filled canister and that it has a valve that is going out, the canister is cracked, or the lines are cracked.

I would run the codes again, but the MIL went off.

Any ideas what I'm talking about and where to find it?


Also #2,

When my car idles, and I turn on the defrost the idle goes crazy (it idles at 800 or so RPMs normally but it goes between 700 and 1100 with the defrost on.) I'm thinking its electrical, and with winter coming up, I would like to fix it ASAP. Any ideas to even begin the search? I'm doing a battery relocation soon, and I was curious if you think this may fix the problem. My battery cables are in pretty bad shape.

Thanks all...

:TY:

 

[dwight97]

ur ac compressor kicks on when defrost is on so it messes with the idle mine the switch went bad next to firewall on ac lines and it kick on and off and idle like crazy i crossed the switch over and it fixed it

 

[reivaxtorres]

ur ac compressor kicks on when defrost is on so it messes with the idle mine the switch went bad next to firewall on ac lines and it kick on and off and idle like crazy i crossed the switch over and it fixed it

+1, either that or the freon level for the a/c is low and thats whats causing your surging idle. my bet would be with low freon.



as for the MIL light, the charcoal canister that they are talking about is for emissions, basically a canister where gases from the gas tank get collected, gets filtered by the charcoal, and then gets vented. either the valve is faulty (could just need cleaning), or the tubes leading to the valve or the canister are broken and need to be replaced. i cant remember 100%, but i believe on our cars, the canister is located somewhere either behind the drivers or passanger side front fender or in the rear passanger side quarter panel. im thinking its in the front tho.