Hi everyone ... Our 1999 MK1 Punto Sporting 16V is having some really
serious power issues. Over time, it has got worse and worse and since the
last service, there is a noticeable, if not dangerous power drop when
shifting the third and beyond. The car needs to be driven with the foot to
the floor and despite the revs going up reasonably quickly, the car could
not pull skin off custard!
Just to recap, the plugs and wires have been changed at the last service and
the air filter, fuel filter and oil filter/oil were changed at the last two
services. After the last service, the car had a noticeable "jingle" when
shifting gears ... Not every time, but most times. I thought nothing of it
until the last week when I was reading about dropped baffles and clogged
cats on another car forum.
That got me thinking ...
So, how do you check for a clogged cat? I have read a couple of technical
websites which suggest doing a vacuum check and revving to 2500 RPM. I have
connected a gauge to the only vac line I can find in the engine, which is
the FPR vac line. I t'd the gauge off that line and found 19 inches of
vacuum at warm idle. Revving the engine got the just up to, like 5 inches of
vacuum, and then holding at 2500 RPM made a reading of 25 inches of vacuum.
According to one site, "You can do a vacuum check at idle and then at 1500
RPM. If the vacuum is say 21 inches at idle and like 15 inches at 1500 then
the cat is likely clogged." So ... Does 25 inches mean it's super-clogged,
Can anyone give me any hints?
1999 Fiat Punto Sporting 16V (Mk1)
And some SAABs :) ... http://saab.go.dyndns.org