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Brera 2.4 erratic idling

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erratic
1K views 10 replies 7 participants last post by  V8VANTAGE 
#1 ·
Hi people. Brera 2.4 jtdm runs great but when at a standstill the revs start to hunt slightly. Been told it could be a few things and possibly the dreaded swirl flaps..59 plate with 49k.cambelt and pump changed 2 years... also every now again it cuts out after start up but starts again no problem. any advice greatly appreciated..cheers..:paranoid:
 
#4 ·
I have the 2.4 in my 159 and sometimes I have an RPM needle that moves +/- 200 rpm when warm and idling at red lights. However, I have noticed that there seems to be a link to the EGR cleaning cycle, because whenever it happens, I can feel that the EGR starts cleaning itself shortly after. Once the EGR is clean (takes 10-15 minutes), the needle stops moving when idling.

Maybe keep an eye out for the EGR actions whenever this happens. Or is it always at idle?
 
#10 ·
#11 ·
Mine also does this. It's likely to be the EGR valve, but it could also be the swirl flaps. Luckily, it is possible to get both 'deleted' so that the car doesn't require them.

Also I have noticed that it seems to effect the DPF in that it regenerates soon after given the car a bit of an 'Italian tune-up'. I guess because there is enormous back pressure and that is increasing the temperature, thus it feels the need to regenerate???
 
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