Mend > Cars

How to stop periodic rev drops on a fuel injection Punto?

I have an N reg 1.1 Fiat Punto with fuel injection, but when the car is cold, and quite often even after its warmed up, the revs suddenly drop down ever now and again. When I'm on the road, it has the same effect as if I were gently braking, then the revs kick back in and the car jolts forward again.

Sometimes, after just starting the car up, the revs will drop periodically, i.e. every 5 or 6 seconds, and will keep doing so until I floor the accelerator for a bit. Stepping on the accelerator just slightly often makes it worse to the point where the revs drop so low that the car stalls.

Anyone else experienceing this, and if so, any suggestions on how to get rid of it?

Phill T
June 2004

Fiat Punto Vehicles, Cars Drops Fuel Car

Not sure about Punto but my Uno, that I've had for 6 years, has always had that problem - I've had mechanics & AA/RAC people looking at it and all say something different but general opinion was that it was a faulty thermister (not sure on spelling) that wasn't gauging temperature for the fuel injection. Basically it was a problem with the fuel injection management system and thus expensive to resolve. I just learned to live with it.

Graham
January 2005

Automatic choke could be the problem??

C
June 2004