Hi
I had a fuel consumption problem with fiat punto 1.1 1998. I have replaced the plugs, leads, oil, oil filter, fuel filter, and the cooling water. neither of those worked out . I suspecting that the problem maybe in the fuel injector; it might be blocked! could that be the problem? does the injector cleaners work in this situations and how to use those cleaners usually if the works??
I also have done free driving test and there is no problem!
Any other suggestion what might be the problem?

thanks

When you say a fuel consumption problem is it using a stupid amount of fuel? and do you do mainly short journeys of long ones and a few people have tryed them ceaners and came back with bad results if i remember wrightfully

Suggest check the fuel filter; this may have corroded and be leaking petrol; it is located just in front of the rear wheel driver's side; the connections are push-fit.....

1) Faulty thermostat (remains open, thus the engine runs with lower than optimal temperature).
2) Broken (not airtight) rubber tube connecting intake manifold and vacuum sensor.
Just ideas...

Finally:

earth side wire to injector earthing out
faulty water temperature sensor
faulty air temperature sensor.

But unless the engine is running very rough, I have my doubts.

thanks for the replays guys...the problem was with the fuel pump after all..a leakage from the plastic top of it..changed the pump and problem solved...........thanks