Re: Need a little help with Air pump plumbing
I hate to be the one to give you bad news but you need to know what could be ahead for you
If they do a visual you can be in a lot more money
Past owner may have put headers on and that is smog illegal
They may also deleted the CATSs, that is also illegal and they may also deleted the 2 O2 sensors after the CATS
The smog pump is located below the left headlight, check to see if the pump is still there or gone
from the pump is a hose which goes to the left exhaust manifold which has a check valve which then mounts
to center of exhaust manifold, see if that is capped off or worse if headers does not even have the smog mount
That hose then goes around the back of engine by firewall and then goes to another check valve to the exhaust
of right manifold.
Now they may have hacked the GM calibration to turn off smog, CATS and rear O2 sensors so even replacing the parts they still would have problems
C5 has 4 O2 sensors, 2 are before the CATS and then 2 after them
IF past owners hacked CATS and rear O2s out, the wiring for rears may have been cut off and the 2 fronts have long wires due to IF there is long tube headers
Now depends on how much the visual the smog shop does.
If they do not bother to look under the car and do not see headers then maybe you can get off my just putting the smog parts back on
Now they also would do the smog testing (if county your in does that) and if they see any of what I mentioned not working or tripping error codes the car also would fail
You need to solve the visual first, then you need to use the DIC of C5 and see if ANY current or history error codes are showing. Do NOT do a smog test if errors are shown !
Else find someone that has a OBD-II scanner that does the same smog tests and see if car will pass of fail OBD-II tests
Lastly due to all the mods the PCM tune could be OK or crap and like running way to rich or lean would get caught in testing IF your county also requires the car on a chassis dyno type tester and runs engine 240 seconds for 15 and 25 MPH while monitoring the exhaust makeup from exhaust tips
So you need to first find out exactly what type of testing in your county and correct from that
Some states allow for a "pre-Test" meaning you pay for the smog test and if car fails it is not entered into state smog database and not go against the car.
Never ever disconnect battery before going to a smog test as when doing so ALL internal PCM smog test results are erased and they all would show a non-complete (failed) state and could take several drive cycles to complete and be a in passed state
Mike M - 2001 / 2008 Z06s