Technical Fluctuating revs when engine starts

[benstevens]

When I first fire up my Punto HGT, when it's iIdling before I go anywhere, the engine revs up and down for a while. This lasts for 20 seconds approx. and then the revs level out.
Is this mean to to happen or it is it a problem I should have looked at?
anyone have a simlar thing?

Silver Punto HGT 2001

 

[weewillywinky]

auto choke probably.

 

[benstevens]

Thank you my friend.

Is it anything I should worry about?

Silver Punto HGT 2001

 

[mad_colm]

i'm thinking airflow sensor.

Met Cognac 99 Brava 100 HSX, what do you want? cupholders? open door warning light? grow up!

 

[benstevens]

Same question again, do you think it's something I should worry about?

Silver Punto HGT 2001

 

[mad_colm]

not really, but i'd prefer it not to do it in the first place!

Met Cognac 99 Brava 100 HSX, what do you want? cupholders? open door warning light? grow up!

 

[benstevens]

Agreed

Thanks for the info mate

Silver Punto HGT 2001

 

[stuuyh]

if it was the auto choke kicking in it shudnt fluctuate really,it should jus rise a little above normal until the engine is warm and then return to normal

sh

 

[weewillywinky]

on the other car (a new shape clio), the revs rise and fall quickly whilst the engine is cold. this is the auto choke. it only does it for a minute when first started when cold. then goes back to normal idle. on my mk1 punto, the revs rise above the normal for a minute then fall back down when warm. if your symtoms are the choke, then it is perfectly fine. i am having a guess as yours is a newer car than mine, as i dont have one.

 

[punto girl]

mine does that and sometimes when its sat in trafic, the garage has had a look at it today and couldnt find anything, they its got to go back again so they can have another look at whats causing it, as its not ment to happen.

c sherriff

 

[benstevens]

Posted - 11/03/2004 : 17:25:03
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mine does that and sometimes when its sat in trafic, the garage has had a look at it today and couldnt find anything, they its got to go back again so they can have another look at whats causing it, as its not ment to happen.

c sherriff

Mine only does it when the engine is cold and only then for about a minute
Sounds like you have had a nightmare wuth your car

Silver Punto HGT 2001

 

[mad_colm]

punto doesn't have an autochoke as it's fuel injection

Met Cognac 99 Brava 100 HSX, what do you want? cupholders? open door warning light? grow up!

 

[punto girl]

Originally posted by benstevens

Posted - 11/03/2004 : 17:25:03
--------------------------------------------------------------------------------
mine does that and sometimes when its sat in trafic, the garage has had a look at it today and couldnt find anything, they its got to go back again so they can have another look at whats causing it, as its not ment to happen.

c sherriff

Mine only does it when the engine is cold and only then for about a minute
Sounds like you have had a nightmare wuth your car

Silver Punto HGT 2001

just about got everything on the car sorted now, had a new cam belt fitted the other day and had to do a modifacation on the rear end because the back was creeking, just waiting to get the ventalation unit changed and all should be good i hope!!![8D]

c sherriff

 

[Richard Carter]

I've just posted a similar problem...

I have a strange problem with my 54-reg barchetta when starting from cold.

The engine revs by itself from about 1800RPM dropping almost to the stall,
and continues for a couple of minutes or until its been driven half a mile.
Neither the main dealer nor an independent garage can diagnose a problem,
but it has been recently serviced and just had the throttle body replaced.

Did anyone here manage to find and fix the problem?

Thanks,
Richard

 

[newstor]

I've just posted a similar problem...



Did anyone here manage to find and fix the problem?

Thanks,
Richard

I am suffering exactly the same problem with a Punto 75S...

 

[DanGil]

You have to clean the throttle body out ( it'll be full of oiley gunk) common problem on hgt's. I don't know if its the same for a 75?