Ford focus zx5

Check your belt. Lack of maintenance.

8 Things that Can Cause Your Car to Overheat..
> The coolant level is low.
>You have a leak in the engine cooling system
>The thermostat is bad.
>The water pump is failing
>Your cooling system has trapped air
>The radiator cooling fan is not working properly.
>The radiator core has become clogged.
>You have a blown head gasket.

Check your fan belts...if they are loose you will loose power and the car will overheat.

interior engine problem most probably head gasket, sorry

SOUND LIKE WEAK PRESSURE PLATE SPRINGS OR CONTAMINATED FLYWHEEL AND PRESSURE PLATE SURFACE HAS OIL ON IT..BESURE TO CLEAN FLYWHEEL AND PRESSURE PLATE MACHINE SURFACES WITH BRAKE PARTS CLEANER.

It's possible it's your fuel pump getting ready to fail. There was a recall a number of years back on the fuel pump, which your local Ford dealer should replace for free.

One of the air intake pipes had come loose. Fastened the jubilee clip back up and it was like having a new car!

HERE ARE SOME MORE CAUSES FOR LACK OF POWER.DIRTY AIR FILTER.TRANSMISSION SLIPPING.MANUAL TRANNY CLUTCH SLIPPING.FUEL FILTER CLOGGED.AND RESTRICTED EXHAUST.

yes but then it will not pass its annual vehicle inspection because you have done unauthorised modifications.

If its just the speedo failing and the rev counter works ok, its likely to be the speed sensor which is on the gearbox. This will have to be removed as soon as possible to avoid engine damage! Expect to pay about £30-40 not £128 like some have paid from a Ford dealer.

The speed sensor as well as talking to the speedo to say how fast youre doing also talks to the fuel pump and adjusts the amount of fuel to send to the engine according to the speed your doing. So, if it thinks youre doing 0mph, it will supply a minimum amount of fuel and is likely to stall when slowing down. You might notice a lack of power whilst the speedo is failing as its starving the engine of fuel, causing it to run a lean mixture, which also burns hotter and could overheat and damage the engine.