what is this?? is on the side of metering unit. Need any vacuum pipe to the small pipe??

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Its the fuel Pressure regulator

 

no pipe need

 

ok thanks for your help

 

No pipe needed but one can be fitted if you know why

 

tell me your thoughts...! don't be shy

 

adding vac pipe herecan help with on boost fuelling. theynormally tee it into one of the small diameter pipesthat come off the top of the inlet. they didn't leave the factory like this though, its something people did to achieve correct afr's when running more boost. most people run efi now though

 

Yes DON'T do that unless it's done by a tuner, you'll be lean off boost and rich on! lol

 

In addition to this you also lose barometric correction.

 

yea, my tuner did this to get the fuelling safe at 1 bar. its not something that people recommend doing though. unless you have equipment to moniter the fuelling and a (rolling road) and know what your dealing with id leave well alone.

 

Which tuner was this?

I dont think it needs to be touched regardless of boost/power level.

Unless you're at a particularly high altitude and its making things awkward.

 

a tuner local to me. it works and is fuelling safely although in future I think its worth visiting a tuner who knows mfi rs turbo's ect.

 

but where is the best place on the crosspipe over the cam cover or in the intel manifold?