Misfire under load

M

mlngr

Hi guys! I own a clio from 2007 and there is a problem I can’t solve. Under half throttle from 2500 to 2800 rpm the car goes wild, it feels like misfire or fuel cut, but after 3000 it pulls normal. I’ve changed a lot of things, spark plugs, coil packs, MAP sensor, camshaft and crankshaft sensors, timing belt with dephaser pulley is new as well (VVT solenoid is working), second lambda. Also there are no air leaks, and no error codes on can clip.

Any ideas what can cause this? It drives me crazy that i can’t find what the problem could be.
 
Well these always seem to struggle between 2k and 3k rpm especially with mods,make sure the map sensor is tight on the manifold,they make a bracket for these,if you have no fault codes not much you can do without firing the parts cannon,if you are stuck might be worth a trip to engine dynamics or EFI so they can run the car on the dyno and should be able to sort this out with a map.
 
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