xe going crap when warm???

[chug1106]

i have an xe engine in my nova. and it goes brilliant when its cold,but when its warm it splutters occassionally, i have changed ecu,air flow meter, new temp sensor. there is 2bar of pressure at the rail. its almost like the spark is breaking down a bit when hot. new plugs,dizzy cap and rotor arm fitted too

any ideas as i have a rally tomorrow

cheers

[mowgli]

is it actually cooling properly? as in thermostat & waterpump ok.. cos it sounds like classic overheating to me.

[chug1106]

brand new water pump, is it ok to run without a thermostat
?

[calibra-keith]

^^ could be that, ECT sensor ?

relay ? had a similar problem years ago in mk2 astra and not long ago in mk1 golf, ran great for short while and short trips, went to hull and cut out would not start till relay cooled down

[chug1106]

ect sensor? as in engine temp sensor?the one that has a 2wire plug on it at front left of engine?
thats new

[simonm]

Is it running on standard management should have more than 2 bar fuel pressure what fuel pump you got