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Clio III 1.2 16v Jerky and high fuel consumption



  Clio III 1.2 16v
Hi!
I have a problem with this engine.
Sometimes when I start or give it gas from low revs the engine shakes/jumps slightly. The same thing happens when starting from a stop.
It doesn't happen all the time.
I noticed that sometimes it also shakes at idle. Recently when I was standing still it started jerking a lot and the check engine light was flashing.
On a cold engine, after adding gas, it slowly drops revs, as if it was getting too much fuel. I noticet that fuel consumption is to high.

Things I've already done:
-new filters and oil
-new spark plugs, wires and coil
-new crankshaft position sensor
-new air flow sensor
-cleaned air pressure sensor
- cleaned throttle
-adjusted valves

What could be the cause?
Best regard
 


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