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Old 28-05-2019   #16
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Re: Barchetta emissions !!!

Since you changed the lambda and is flooding is fuel (running rich would be correct term) it sounds to you have vacuum leak, it make the lambda sense the extra o2 and injects more fuel to compensate.
Finding a vacuum leak is easy with a smoke machine, unplug one of the hoses in the around the intake manifold and flow smoke throw it and see if you see it escaping then u have a leak somewhere. I've seen people smoking a cigar and blowing it in.

Also clean the mass air flow sensor with electronic parts cleaner.
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Old 28-05-2019   #17
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Re: Barchetta emissions !!!

Thanx guys, first i have fitted a new idle control unit so it shouldnt be a problem but im not convinced.
Where/ what are the vacuum fuel pressure reg and the throttle position sensor ???
I will take a look/ renew if i knew where it is !!
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Old 29-05-2019   #18
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Re: Barchetta emissions !!!

the fuel pressure regulator is at the end of the fuel rail. you will see this odd shaped inverted cup with a vacuum line attached to it . it is held in place with a metal, press fit cover.
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Old 06-06-2019   #19
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Re: Barchetta emissions !!!

Found the fuel press reg ! If i take it off what am i looking for ??
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Old 08-06-2019   #20
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Re: Barchetta emissions !!!

Hi don't remove it . You can do a quick check by removing the vacuum line and starting the car. If any fuel leaks out the diaphragm is pooched and the unit must be replaced. if you have access to a fuel pressure gauge you can also check to see that the fuel pressure is holding steady. vacuum is highest at idle so the spring inside will be compressed. as engine speed picks up vacuum will drop allowing the spring to lengthen causing fuel pressure to increase. pressure comes from the pump, the spring controls a moveable valve allowing more or less fuel through the fuel rail.
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