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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » cold-start missfire. please help » Post Reply

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ali_corsa

 posted on 7th Sep 08 at 18:44

headgasket mine was still the same changed cts sensor still the same so just changed headgasket and has been fine ever since


williamsvts

 posted on 7th Sep 08 at 18:26

mite still be headgaskett or even a valve problem. try getting a leak test done


mattyross

 posted on 7th Sep 08 at 18:06

quote:
Originally posted by williamsvts
poss headgaskett, coolant may be leaking in to the bore and causing it to missfire, is here any coolant loss?


no coolant loss at all, i keep a very close eye on it.
if any coolant is leaking in, it must be an extremely small amount.

as of today, i have noticed a very subtle missfire even when warm
placing my hand over the tailpipe, i can feel 'an irregular heartbeat'..
no water vapour or other signs though.


i hate this. thanks for your immediate help though, i appreciate it


williamsvts

 posted on 7th Sep 08 at 18:01

poss headgaskett, coolant may be leaking in to the bore and causing it to missfire, is here any coolant loss?


mattyross

 posted on 7th Sep 08 at 13:46

i have a p-reg 1997 1.2 eight valve C12NZ
95 thousand miles, owned and maintained carefully for three years.

the engine has suddenly and fairly recently developed a missfire after starting from cold
the engine turns over and fires perfectly, as per usual
but nine times out of ten it suffers from a mild-violent missfire.

i hold and stabilise the revs at fast idle for approximately one minute,
then the missfire eventually settles down and the engine performs normally.


my ignition leads are a year (15k miles) old
my spark plugs are the same and have been cleaned/inspected
i have purchased and fitted a new distributor cap
i have recently replaced the coolant temperature sender in the inlet


i am well and trully confused and losing confidence in the car's reliability.
the problem is not logical and intermittent,
please help or offer advice/ suggested questions :(