Engine problems

[G40_FUNK]

Hi

Not sure what is going on with my g40.  Used to have lots of power, but seems to be majorly lacking now.  Has an oil leak thats been traced to the sump gasket, and the belts are slipping somewhat.  At low revs it keeps dropping power, and you can feel it pull when it does this.  Often this results in a loss of power and it cuts out.  Will restart fine, but keeps doing it.

I'm at a loss unfortunately.  Any advice?

Chris

[bushyg40]

same sort simptons on mine sounds a bit like lambda probe going try disconecting it and have a drive

[G40_FUNK]

Thanks - much appreciated.