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968 Engine Sudden death - MAF?

tref

PCGB Member
Member
Last night on the A303 in "Bomber", the 968 engined S2, foot down hard accelerating up hill suddenly lost all power. The car starts, but almost immediately dies. So I am pretty sure it has spark, because it starts, and kind of runs for a second or two. It kind of responds to the throttle, but doesn't rev, just kind of coughs in time to throttle pumping. The same thing happens on both petrol and lpg, so thinking it is not fuel system related... The fact it starts and runs every time suggests it is unlikely to be ignition related, so my first thought was massive air leak, like blowing off the hose on the intercooler of the turbo... except all seem to be intact, unless there is something under the inlet manifold I am missing. So I am thinking MAF... I have disconnected it, and the car exhibits exactly the same starts, but dies characteristics (I didn't try the throttle on this test, as I wouldn't expect it to respond favourably anyway)... I did also a few months ago (OK, over a year, but with long periods of inactivity), have a problem of a fast idle and hunting between 1200 and 16-1800 rpm, that I replaced both throttle switch and ISV, neither of which made a difference, but the fault suddenly cleared itself... Does this sound like a MAF problem?
A quick trawl around suggests that a Volvo or Saab MAF may also be suitable/the same, it being a Bosch part. Anyone know of this/any experience of it? Without knowing for sure it is the MAF, I would rather not pay Porsche tax if I can avoid it!
Any other suggestions?
 
It does sound like a MAF issue but it might be a broken wire in the plug


the MAF is only used on the 968 and RS2
but as you suggest the Volvo one off a big V6
I would be checking all the plugs wires and pins first
 

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