Hi

My fiesta has engine problem. No fault code, no warning lights. It isn't matter the engine is cold or hot the car moving or stand the problem is constant.

No smoke or drastic oil consumption.

The problem is lose engine power, high co2 emission, poor accelerate and the most important thing is when I rise the rpm over 3500 or higher and I

release the gas pedal and I put the gearbox in neutral position the engine rpm falls down 0 (no idle power) and the engine stop. 

If the car don't moving and I rise the rpm over 3500 or higher same thing happening.

Anyone has same experience?

The list what the ford swapped in the car:

Oil filter, air filter, fuel filer, timing belt, water pump, lambda sensors, mass air flow sensor, pcv valve and hose, reset the ecu, checked the vacuum leak, new alternator and starter motor.

 

I have forscan live data if it is help.?

Thank you any advice.

 

17 hours ago, Tomtom50 said:

The spark plugs and ignition coil is new too.

 

 

Could that be the VAC pipe/ Breather pipe issue?

Have you cleaned the throttle body?

Check the catalyst hasn't collapsed inside and is blocking gasses from escaping

On 7/4/2024 at 1:20 PM, DaveT70 said:

Could that be the VAC pipe/ Breather pipe issue? No vacuum leak or hissing noise

Have you cleaned the throttle body? Yes

Check the catalyst hasn't collapsed inside and is blocking gasses from escaping  It hasn't collapsed

forscan live data screenshot, warm engine: stable idle rpm, pushed gas pedal go up 3400rpm, and falling down 0rpm and engine cut off

 

Any strange data?