I understand these swirl flaps can get stuck,break off and cause problems, but what sort of symptoms do you notice with the car?
On my particular car the swirl flap arm appears to move freely, but I guess there's no way of verifying if they are working correctly internally.
I know the removal of the inlet is a nasty job, but once this is done, what is done as part of the swirl flap delete? Does anything need to be adjusted on the ECU? or are they physically removed, or just disconnected from the motor?
Thanks in advance.
Hi, for watever reason i cant access your private message, ive done this alot but only on a 1.9jtdm, Firstly it gets its name "swirl flap" from the effect it creates in the cylinder to burn the fuel more efficiently and cleanly (at low revs). you basically have 2 sets of intake ports and at idle to say a couple thou rpm the flap will block one port/partially block creating two different air pressures ingoing to cause the swirling. anything above 2500 or 3000 rpm (guess) it should be fully open.
Now the 1.9 doesnt have this bar i keep hearing about neither can you see anything, so its just a straight case of stripping it apart, ECU scan will only tell you if the actuator motor turns (nothing else), it has an actuator from under the manifold ... anyway the symptoms have been mentioned, not all to different from bad EGR symptoms and its an easier job the more you do it, and becomes relatively simple.
The flaps themselves are screwed onto the internal bar so easy to remove and just leave them out, If one was to break loose realistically it would just rattle like hell ... i cant see it fitting past the valve stem and through the lower port to interfere with valves or get to the cylinder.
Im still unsure if some later 1.9 didnt even have them from the factory or they got removed in very early life, after a number of issues got reported.
If your not good with engines, get it done professionally. However thats not to say you cant do it with patience, but you could nudge your timing out despite being bolts to secure the gears in place.
never touched a 2.4. sorry.