Fiat Punto HGT 1.8 16v Hitachi system - Mixture goes weak and rough idleArchived Message
Posted by Alan Marklew on September 8, 2006, 8:30 pm
Hi this punto all of a suden went very weak 23:1 didnt want to rev and was very unstable at idle, if you cover the throttle body with two fingers it smoothes out and revs, suspected pump as pressure seemed a bit low (2 bar, which should have been enough but just a bit low )so changed the pump, still the same. scanned it, no codes and live data for the airflow, Injector pulse width and throttle pot seams ok, no air leaks present, breathing system intact and air tight, doesent seem to be an egr valve and have blocked off tank vent on manifold. Am stuck now and going up the wall, please someone show me the way to the light TIA Alan