I have a ford fiesta 1.4i 16valve zetec,the car loses revs and trys to cut out when ticking over,the revs then start to bounce. i have change the airflow meter and had all the sensors checked on a diagnosics machine and they cant find a fault.
1.6 16v escort had all service leads fuel filter lamda and cat starting from cold lumpy for 30 secs drives great heater goes hot cold temp gauge went up hot drop to cold and when ticking over idle alters to drop away but dosent stop engine would thermo do this
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? 1:54 www.youtube.com/watch?v=Y78GTNBytSQ May 29, 2012 - Uploaded by georgef551
I found a start-up flaw in the Ford Fiesta, when I occasionally tried to start the car quickly, and... ... this happened. I had them either fail to fully turn over, or other CPU-based starters wouldstart up the vehicle. ..... Ford Fiesta 2004 Lx 1.4 petrol mk6 won't start help ! ... 2012 Ford Fiesta Zetec 1.6 TI-VCT. Start .
engine cutting out is a sensor probably the timing sensor. needs replacing. as for braking would think you have a leak in the air line. even with the engine not funning you should be able to apply the brakes upto 3 times.. think this model is not fitted with abs like my sisters. when engine is running rev upto 3000 rev's if it starts to judder. also listen for hissing sound, if you find one repair it. most problems are down to a leaking air line.
Prognosis is really bad, hate to tell you. Ticking comes from the valve lifters, losing lubrication due to lack of pressure and running dry. At redlights, when revs are at idle, oil pressure drops a lot, and engine really suffers. Have the vehicle taken immediately to a shop for proper diagnose and to see if engine can still be saved. The loss of power comes from the valves not actuating properly. Hydraulic lifters need oil at a decent pressure to "charge" , and if not charged, they will stay compressed, ruining valve lifting operation.
here is a list of possible causes. 1- worn,faulty or incorrect plug gaps 2- faulty HT leads 3- engine management fault. 4- vacuum leak on inlet manifold or hoses 5- incorrect valve clearances 6- faulty hydraulic tappets 7- uneven or low cylinder compressions 8- disconnected or leaking crank case ventilation hoses