Technical No Power

[tmccar]

My 2000 Punto 1.2L 8v has little or no power - hardly enough to start moving. Having looked through some relevant posts I suspected the cat and got a replacement at a breaker's yard. But the replacement has 2 tapped holes (am I right in saying these are for the O2 and lambda sensors?), whereas the existing one has just the one.
Can I still use the replacement, if I plug the second hole? And does this mean that my Punto has an O2 sensor only?

 

[maggers]

o2 and lambda sensors are one and the same thing, just blank off the hole you don't need. Are you sure you only have one sensor, there should be a downstream sensor somewhere.

 

[fingers99]

From memory, early Mk2s (like the Mk1s) only had 1 sensor. You can buy bungs for them for a couple of quid.

Good luck with it, but I can't see it being the CAT.

Does code read thrown anything useful up?

 

[flisko]

My 2000 Punto 1.2L 8v has little or no power - hardly enough to start moving. Having looked through some relevant posts I suspected the cat and got a replacement at a breaker's yard. But the replacement has 2 tapped holes (am I right in saying these are for the O2 and lambda sensors?), whereas the existing one has just the one.
Can I still use the replacement, if I plug the second hole? And does this mean that my Punto has an O2 sensor only?

running on 2 cylinders + head gasket fail?

 

[tmccar]

running on 2 cylinders + head gasket fail?

Yes, possibly - I might take the head off and look.


"Does code read thrown anything useful up?"

Unfortunately. my OBD2 scanner will not link, although it does on another 00 Punto. I guess it must be an early model.

 

[fingers99]

Yes, possibly - I might take the head off and look.

Compression test would be much less work!