Several years ago a hitherto non-beat missing Nissan, suffered engine cut out on the over-run approaching car park at work (following 20 odd mile run) ... After a while I was able to restart ... never occurred again. The car was carburettored, the consensus of opinion was a momentary problem with the valve which turns the fuel supply off in 'over-run conditions ( the ORFCO valve is/was a fuel saving device (supposedly). Basically when your foot is completly off of the throttle, and the revs are over 1500 rpm it activates a little solonoid in the carb which cuts all fuel to the engine) ... Problem item unproven. I cannot imagine any such valve on a fuel injected engine, probably built into engine management system ... perhaps connected to possible crank sensor probs?
I Found no 'fluff or fine wire wool' around the jetting in carb .. Not really expected as Nissan use relatively large separate filter. No apparent water in fuel... Used different petrol station for a couple of fill ups.
Nissan dealer unable to cast any light following inspection.
Just glad it did not happen in a dangerous place .. like the outside lane of busy MoWay or joining fast flowing main road (no hard shoulder). Certainly allowed a little extra space until confidence returned.
Another link.
http://66.102.9.104/search?q=cache:...-20/4d9f4d76.html+vauxhall+crank+sensor&hl=en
A little 'iffy', correction, almost totally 'iffy' forum but is an ominously long thread .. there may just be the odd post or three which points the way .. Or maybe not !! ....
If the talk is provably ECU, assume the position, wallet held upside down, or go 'breaker' route
Re: Exhaust, down the years I have found the 'factory' or 'works' model to have greater longevity (a Peco
full system copy was quality in 70's)... Unless the dealer used same as QF etc. .. But then, I must say, the wife used QF, pre company motor, due to their lifetime ownership guarantee, don't know if that still exists. They replaced her shopping trolley's rear section twice over following 5 yrs for nix ! Apparently the 'guarantee' was a worthwhile customer grabber for them... worked well for us back then in the 90's
QuickFit may advise.