sepulchrave

This thread appears to be derailing somewhat, I think the OP has his answer anyway: Do it with tyres, not imaginary extra gears.

11.6V is a very dead battery, it should read 12.7V if it's new. I'd replace the oil pressure switch to rule out a fault but good oil level is no guarantee of good oil pressure and if it's using a lot of oil it must be going somewhere.

Your back brakes do hardly any work so they don't need an upgrade, larger pistons will move less but press harder, this may cause the ABS at the back to operate more often. What's wrong with your existing calipers?

Don't waste your money, it doesn't do anything for performance on a diesel. The standard exhaust system is good for up to approximately 220 BHP.

The Fabia was supposed to be the car that salvaged Skodas reputation, I think they initially overdid the bodyshell rustproofing, probably by slowing the line that puts the bodyshell through the bath to give it a thicker and more thorough coating, then ze Germans with clipboards showed up and made them run it faster.

I've noticed the earlier cars seem more resistant to tinworm, cars that have lived up norf get salted underneath most winters whereas here in the beautiful sarf they don't.

They're all frauds so I guess we'll have to wait for the OP...

Will you PLEASE stop yakking on about changing the injectors, if you could be arsed to trawl these pages for every post about a PD150 on a BLT you'd quickly see it's complete unnecessary, believe me, I've been here twelve years and if I had a fiver for every time I've read such a thread I'd have enough to buy a nice shiny new car. Your problem sounds more likely related to the fact that you STILL haven't had the damned remap done yet, get it done then see if the problem persists. Finish the work then post back.

Just as an aside you shouldn't use copper anti seize compound as a lubricant at all let alone for plastic parts like that gearshift mechanism. Use silicon grease for plastics, regular grease for metals and anti-seize for stopping fastenings seizing due to corrosion.

It's not illegal to bypass the sensor, it's just dumb, the sensor tells the ECU when to regen the DPF, without it your DPF will just clog up until the engine stops running.

Give us the list!

I think there's an adaptation routine that needs to be run if you change that differential pressure sensor.

It might be worth changing the angle sensor.

I strongly suspect a wiring issue, probably the engine loom, the core strands get work-hardened and start snapping making intermittent contact as the engine rocks and moves until something important goes and the ECU says no more and puts the car into limp home mode, this mode will usually clear when you switch the car off and back on again and restart it. A generic code reader simply isn't good enough for diagnosing tricky faults like this, you need access to extended VAG diagnostics so I suggest you find a good auto electrician rather than using garage mechanics. You could simply replace the entire engine bay loom but that could be very expensive indeed. Bad luck, but if you find the right firm this may not be that expensive to put right, the sheer mongolism of replacing a perfectly good ECU beggar's belief so you can imagine the scale of the bills the previous owner paid before palming it off on you!

...but fitting larger diameter tyres has the same effect as changing the final drive ratio, therefore making all the gears taller and yielding greater fuel economy in conjunction with higher pressures.

The 1.2 3 cylinder engine was developed in-house by Skoda engineers using the gearbox found in small engined VAG economy cars, there were no six speed variants of this gearbox made at all AFAIK.

There isn't a six speed gearbox that will fit the 1.2 three cylinder engine. As @Breezy_Petesays, the key to more mpg lies with the tyres, you need to fit the narrowest tyres with the largest diameter that will fit and not foul, then pump them up nice and hard, 2.5 bar to start with and see how you go from there.

No, do them one at a time, remove and discard an old bolt then fit and correctly tighten a new one, this way the gasket should remain stuck in place.

Again, it REALLY doesn't matter, we don't live in a hot climate or a cold climate so viscosity is largely irrelevant to us maritime temperate types. Get what's cheapest.

Yes they do.

It doesn't matter. Either is fine.

Just replace that injector, failure is common and the only cure is to fit a new one.

That, and it's made worse by the Fabia having a bladder like an old lady.

Downshifts can cause the chain to jump if its loose.

In that case the timing has slipped.