406oc.co.uk

It's actually the same crud that covers the windscreen. The laser just cant see through it since it defuses the LED given out. Lens cleaning fluid on a cotton bud wiped over the lens and polished with a dry bud afterwards is a long term fix

On my 90 406 the emissions were better at 178k than at any time during it's life

Not even run in then

Prob one at each corner of frame, I've cleaned them out on a 405 in the past with some CAT5 network cable, stiff but flexible

Yeah, I thought my cable was a bit on the loose side, tightened it up and it threw the throttle pot out of lower/higher parameters. Only a trip to the dealers sorted the problem.

Don't tighten the cable too tight else this will cause the ECU to throw an error and subsequence trip to dealer to plug and sort.

I thought it was a linkage problem and not a gearbox problem?

Thing is, you've now found the problem, so it'll be cheaper to fix it than to buy a new car, the car is also a known quantity (that may be a good or bad thing!).

I think the 407 has a dual shared system, so you may be correct.

Just go to Hi-Q tyre service to get an oil change, it only cost £23 so not much of a saving by doing it yourself (around a total of £1) and you don't get all oily (unless you like being oily!).

Shell V-power doesn't seem to give any more power, but it does keep emissions clean along with the combustion chambers and associated parts. A clean engine will give more power. Shell V-power also seems to make the engine more noisy.

You just need to clean the hall sensor pick up with brake cleaner and re-fit. Done it loads of times in the past and as always worked great.

Which would suggest that there isn't an external leak, otherwise the pressure would drop quickly.

Yep, that could do it Welt It's sometimes difficult to give an answer to some of these question, since it could be several different things which you can only sort by trying things yourself

Actually it's the water temp that pressurises the system (hot water expands) in a normal situation.