Idle hunting Kpro Rotrex SC install

luke_sedz · Post by **luke_sedz** » Fri May 29, 2009 10:42 am

Hi,
I have recently fitted a rotrex supercharger setup to a UK EP3 K20A. I had this SCto a different car so still have the same map. The setup now has a FMIC instead of top.

I installed the setup and had it running last week but i had a problem with some of my piping to the supercharger flexing to much. I have now changed it all to solid pipe, started the car up and it has a hunting idle.

When i start the car the RPM gradually climbs to 2500RPM and then drops back to 1000RPM and bounces between 1000RPM and 2000RPM.

I have uploaded my data log of it running for a few seconds to see if it shows anything.

Anyway i hope someone can help clear the problem up.

Thanks a lot
Luke

Post by **Spunkster** » Fri May 29, 2009 11:13 am

Looks like a vacuum leak of some kind. You'll need to find the source of the leak and fix it.

cranny · Post by **cranny** » Sat May 30, 2009 8:42 pm

a substantial vacuum leak id say by the map readings. should be -20 fully warm at idle approx.

Boofster · Post by **Boofster** » Tue Jun 30, 2009 2:36 pm

That's funny I have this same issue on my S2k Rotrex.

Is -20 vac standard for all cars?