Hi all,

 

My 2010 CR VRs went into limp home mode under load.  At first the flashing glow plug light, which cleared after the ignition was turned off, but the car still felt sluggish, and then the locked in limp home mode.  I read the codes with Carista and it is P0299 Under boost.  I checked all the pipes etc. for leaks to no avail but after reading a post somewhere on the Mr Muscle thread, I removed the rubber pipe from the N75 to the actuator and sucked.  My understanding is that the actuator should hold pressure and if you suck you should feel resistance, and be able to block the pipe and feel residual suction.  I had none of this - it was easy to suck.  Am I right in my assumption that the vacuum on the actuator is knackered and a new actuator should cure things?

 

thanks

Did you completely remove the suspect pipe and inspect or just have a look/feel in situ?

 

If you can get underneath and suck on the pipe attached to the actuator or substitute another piece of pipe eg. fish tank air pipe, you can then see if the actuator holds vacuum.

 

I'm not sure if the actuator is replaceable as a separate item, probably you can source one somewhere even if it means a trip to a scrappy.

 

I did doctor a vacuum servo on an ignition advance once.  The diaphragm was holed so I opened up the crimped chamber and substituted a piece of bicycle inner tube, worked fine!