Fiat Punto. Engine Hesitation Problem

[raymond perry]

Can anyone suggest a solution to this problem. The car has been at the
garage for 8 days without solving the problem. The Fiat diagnostic computer
suggested the coil pack needed replacing this was done but didn't cure it.

• Engine hesitates

• The problem a bit like driving a car with a manual choke when not enough
choke is being used.

• But problem persists even when engine warmed up, even after driving for an
hour or so.

• The problem is present when changing up and also when driving at constant
speed in 4th or 5th

• When driving with a constant pressure on the accelerator there is an
intermittent power loss as though the driver had taken his foot partly off
accelerator this lasts only a few seconds but problem persistent.

• When pulling away after starting there can be a marked loss of power for a
few seconds in 1st, 2nd and 3rd

[Graham]

One of 2 things

Faulty Lambda sensor (most likely) or someone has fitted incorrect
plugs.

Graham
http://www.hglmotors.co.uk

The uk.rec.cars.maintenance FAQ
http://www.motors.freeuk.com/faq/index.htm

[Andy Hewitt]

raymond perry <r...@perry65.freeserve.co.uk> wrote:

> Can anyone suggest a solution to this problem. The car has been at the
> garage for 8 days without solving the problem. The Fiat diagnostic computer
> suggested the coil pack needed replacing this was done but didn't cure it.

Change the Lambda sensor. They are notorious for not showing up as a
fault on the Fiat 'Examiner' tester.

--
** Andy Hewitt ** http://web.ukonline.co.uk/ahewitt/index.htm
Mac PPC, Divvy 600s (CB750 - RIP), Trekky
** Live to Ride (etc) Volvo 740GLE (soon to change also)

[Lester Maloney]

I had a similar problem on my pug 205, which was cured by fitting new plugs
and HT leads. I think the connections on the HT leads were dodgy. Might be
worth a try...

Graham <gra...@hglmotors.co.uk> wrote in message
news:wLk1OCci9e+BqO...@4ax.com...
> On Fri, 19 Nov 1999 19:45:08 -0000, "raymond perry"

> <r...@perry65.freeserve.co.uk> wrote:
>
> >Can anyone suggest a solution to this problem. The car has been at the
> >garage for 8 days without solving the problem. The Fiat diagnostic
computer
> >suggested the coil pack needed replacing this was done but didn't cure
it.
> >

[Michael Canny]

raymond perry <r...@perry65.freeserve.co.uk> wrote in message
news:8149gg$ub5$1...@news8.svr.pol.co.uk...

> Can anyone suggest a solution to this problem. The car has been at the
> garage for 8 days without solving the problem. The Fiat diagnostic
computer
> suggested the coil pack needed replacing this was done but didn't cure it.
>

> . Engine hesitates. The problem a bit like driving a car with a manual

choke when not enough
> choke is being used. But problem persists even when engine warmed up, even
after driving for an hour or so.

> . The problem is present when changing up and also when driving at

constant
> speed in 4th or 5th

> . When driving with a constant pressure on the accelerator there is an

> intermittent power loss as though the driver had taken his foot partly off
> accelerator this lasts only a few seconds but problem persistent.

> . When pulling away after starting there can be a marked loss of power for

a
> few seconds in 1st, 2nd and 3rd

I had this problem intermittently on my Punto GT for around a year and Fiat
couldn't trace the problem - they installed 5 new Lambda Sensors (always the
first solution to ANY Punto problem), HT Leads, Plugs, a new ECU and Chip
and still the problem occurred - Turned out to be a loose wire going into
the ECU in the end and cost 2 minutes in labour charges to fix - luckily the
car was under warranty!

Michael
http://www.users.totalise.co.uk/~mcanny