problem with punto 1.2

[som3astar]

hi all
I have a problem with fiat punto ,,,,,,

I have a garage and repair all kinds of cars

this car came to me to make a gasket head for it

I changed the gasket and tuned it up ... then I took it for a ride to test it

while driving it .. it cuts out ... near 100 metre of driving the car it's cut off and won't start for 15 minutes or to take the negative battery down then put it on then starts ... and If i drive it again the same problem repeated
if I started it without driving it .... everything is ok ... no shutting down or any problems

I took it to electrical man he said the car needs a new wires ... and put a new wires .. with no change of the problem ... I changed the ECU that is on the intake manifold and the problems still .... I changed fusebox and changed all the relays nothing changed !!! the problem still on .

when I drive it the problem happend and cuts out

when it cuts out also the spark in the ignition coils is gone .... changed camshaft sensor and crank shaft sensor and changed coils the problem still on


also .... I can't access by the scan tool to the ecu directly after cutting out

I unplug the negative battery term and put it on again .. scaning on the tools

can't find any problems with ECU

SO anybody can help me I will be gratefull to him

thanks all

Ismael

 

[varesecrazy]

Hello , and welcome,

pretty sure I've read this on here before - in Punto 2/B section,2000 to 2005

say hi in there,

there are several people in there who will remember better than me,
Chalrie

 

[s and b]

if you are confident that crank wiring to ecu is good then because you can not communicate with ecu then it spossible you have a bsi issue,this is the computer at the back of the internal fusebox
before you do anything else though you really need to try communicating through eobd plug with a different scan tool as often i have difficulty but a cheap tool connects straight away
its a fiat remember