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Fiat Punto mis-fire. Help please???
norm007 - 30/10/10 at 02:18 PM

Hoping for an answer from the land of locost please.

My neighbours Fiat Punto has developed a mis-fire.

It is a 2000 model with a 1.2 engine.
When engine put under load, especially if in a gear too high it, it mis-fires a little.

It has had new leads, plugs etc.
The injectors and engine in it have only done approx 30,000 x miles.

The Lambda sensor has done approx 130,000. Does anybody think it could be knackered, or am I barking up the wrong tree???

Thanks in anticipation.

Norm

Cubby - 30/10/10 at 02:21 PM

My Fiat had a similar problem which turned out top be one of the coil packs . found out later Fiats tend to eat coil packs !!!

Mark Allanson - 30/10/10 at 02:21 PM

Very probable to be the head gasket, they are VERY prone to it. ECU's also go, but the EM lamp comes on in the dash if it is that, they lose 2 cylinders.

norm007 - 30/10/10 at 02:30 PM

quote:
Originally posted by Cubby
My Fiat had a similar problem which turned out top be one of the coil packs . found out later Fiats tend to eat coil packs !!!



Thanks for the speedy replies.
Never ceases to amaze me how helpful people are on here!!!


He has fitted a new coil pack but its not cured it.


Cheers,
Norm

jase380 - 30/10/10 at 02:54 PM

had a cinquecento doing the same thing a few years back and it was the lambda that was knackered . found that after changing plugs, leads and coil packs.

perksy - 30/10/10 at 03:06 PM

Coils are famous on these for going wrong

col - 30/10/10 at 03:11 PM

Had a 2000 sporting....did 70,000 miles never missed a beat,....sorry not helpful but had to put my pennethworth in.....engines have forged components!

balidey - 30/10/10 at 03:41 PM

As above, I run a couple of those engines. Lambda is really a service item. Next to check is plugs, leads, coils.

norm007 - 30/10/10 at 03:45 PM

quote:
Originally posted by jase380
had a cinquecento doing the same thing a few years back and it was the lambda that was knackered . found that after changing plugs, leads and coil packs.





I can only think its gotta be Lambda as from what I can gather he has tried everything elase.

Cheers everybody!!!

MikeRJ - 30/10/10 at 04:34 PM

Lambda will be very tired at that mileage, but unusual for Lambda fault to give issues only under high engine load since they aren't used at WOT.

Where both coil packs replaced? It's not uncommon for a dying coil pack to damage the ECU on these...

johnfloros - 30/10/10 at 04:47 PM

next time buy a TOYOTA

rusty nuts - 30/10/10 at 06:28 PM

quote:
Originally posted by johnfloros
next time buy a TOYOTA


Very helpful!!

ashg - 30/10/10 at 06:47 PM

wont be lamba at high rpm as they are only narrow band.

it will be either a coil pack or the fuel filter. had the same issue on one of my puntos once. turned out to be fuel filter.

norm007 - 31/10/10 at 08:11 AM

quote:
Originally posted by ashg
wont be lamba at high rpm as they are only narrow band.

it will be either a coil pack or the fuel filter. had the same issue on one of my puntos once. turned out to be fuel filter.



Thank you to everybody who replied.

I pass on your comments and when he gets it sorted out I let you know...........