SiV6Qcoupe

Driving back a short distance home tonight when the car got big hesitation on light acceleration, then again it stubbled and then picked up.
My air/fuel ratio meter which is spliced into the right O2 sensor signal which usually gives a very rapid fluctuation around stoichometric mixture suddenly is no longer there. I gave the car some revs which would usually produce a rich reading and I'm lucky to see anything at all!

I can only think that the car is running now on the signal developed by the left O2 sensor, perhaps this is the purpose of having two sensors - in case one fails?

My fuel pressure gauge reads correct fuel pressure at the rail and it couldn't be a vacuum leak as the hesitation would always be there. It seems the car has corrected this hesitation, I'm not certain on the diagnosis untill I take some voltage readings from the O2 sensor and take the car for a run tomorrow.

TurboEnvy52

Re: Sounds about rite, same as me, just wait till it worsens and she runs SUPER rich.