Ford Fiesta zetec 1999 - Engine temp heats up......

You have a '99 Fiesta..that has error codes to decode. You can also have the radiator water analized, for exhaust gasses in the radiator. (for free at most garages), also a pressure test on the cylinders (also free), as you may have a HG failure?

So blocked radiator? Try backflushing it.
Faulty fan? The motor may be faulty due to faulty brushes?
HG fault? Gas check/compression check

Me fitting an additional fan was just masking a problem, rather than fixing it. Which was a slow fan at high speed. Just like you have.

Think of the rush of incoming air hitting the fan, is the brushes are fubar, then the fan stalls, and engine overheats. On the streets, no rush of air, no stress on the motor, all is good.

Thank you I will try and do those bits hopefully at a garage at a weekend, but im still concerned about the fact the car is not fireing properly now since I did the other checks as it wasn't doing this before if i give it no revs when stationary it will stall, is there anything I could check myself for this?

Try working out which cylinder isn't firing? Swap the plugs around, and check the ends for overfuelling (black), or damaged whatever? Make sure the leads are good, and the coil pack isn't bust?

Sounds like the HG now. Good luck!

Will it definately be the spark plugs? I recently changed them last year. There is no oil in th water and when I check the oil it looks fine no milky colour which would indicate HG.

Could it be the timing? When the car is stationary the rev needle moves.

Thanks

79diz said:

Will it definately be the spark plugs? I recently changed them last year. There is no oil in th water and when I check the oil it looks fine no milky colour which would indicate HG.

Could it be the timing? When the car is stationary the rev needle moves.

Thanks

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No I didn't say that, I said it's most likely a failed head gasket, so CHECK the sparkplugs for any sign of damage, swap the spark plugs around, in case one has failed. Take it to a garage, they can analyse gas in the radiator, or reduced compression in the cylinders. A cylinder to cylinder failure usually means the engine bangs on each stroke, and misses, a crack from cylinder to waterway, means all water is lost out the exhaust, and a leak to oil means water in oil, emulsified.

The rpm fluctuating at idle would indicate a vacuum fault on the inlet side, or could also be a coil pack breaking down under load (a traditional coil isn't employed on modern cars, there may be 2 coils, one per 2 plugs?)

Get the engine codes read. Could be as simple as a sensor disturbed.