For a company car, CO2 is where a lot of the cost comes from - the Prius has a much lower figure than pretty much anything (being a hybrid in a contrived test), which makes it a LOT cheaper than a lot of "conventional" cars.
On a related note, cleaned out my inlet manifold the other day...
Although it doesn't look that bad, the inside was disgusting with all the soot / crap / shit the EGR has been pumping in there.
It'd also covered the MAP sensor in a layer of well... crap.
Took it for a drive, and she was very *very* smokey (even turned some of the gravel on my drive black!) for a little bit (guessing all the stuff I'd loosened being burnt off), but now seems ok - car seems to hold the boost a lot better towards the top of the rev range now though.
2 days later my hands still aren't clean!
EGR valves are a hateful invention - I'm sure they help with emissions, but I can't possible believe coating the engine with crud can possibly be good long term.
If this was the case there would be more than one (normally 4 - but I've never seen a mono amp with hi-level inputs), and it would be next to the RCA's rather than the speaker outputs.
A lot of mono amps have 2 sets of terminals, both internally linked, to make it easier to wire stuff up (be it for wiring multiple voice coils or subs)
Easiest way is to use a multimeter on the continuity setting to work it out - but my Vibe A7 is done like this (mono, 1 channel, but 2 sets of +/-).
That is incorrect - you dont have a 4Ω / 2Ω channel, you have a channel which you give an xΩ load, which will then give you yW of power.
I would expect the Vibe sub to be a DVC, probably 2x2Ω. You need to make sure it's wired down to the right impedance to make sure that your getting the most power from your gear (you'd be surprised how much stuff isn't!)
Million more factors to bass than power, though...
On my car (which steals a lot of stuff from BMW, in fact the seal even has a BMW logo on it I think...), the washer pumps grommet acts as a filter as well.
It's easy to end up with a layer of crud on the filter, which blocks the flow of water to the pump.
Only takes a few minutes to "fix" once you've got to the pump.
Airbag sensor could be the connections to the seat airbags? In my car the plugs under the seat can come loose, which triggers the warning light.
Petrol is cheaper than diesel in the UK and has been for a while - but you wont find a quick petrol doing 40+ MPG but you'll easily get that from a lot of diesels.