vtr_chris90
11th August 2010, 22:44
right then my rallye has become a bit ill lol
about 3 weeks ago it developed a very light missfire when the car is cold, at first it wasnt too bad and you could only just notice it, but then itgot a bitworse over the week, it was due a service anyway so i put it down to that
but i got diagnostics on first anyway just as i was curious to what it could be, and the lambda wasnt reading properly on warm up then when warm it was fine, it was a new one aswell so i just got another on warrenty fitted that and it improved a little but the missfire was still there
so that weekend i serviced it and changed a few of the obvious sensors since they only cost me pennies anyway due to working at a motorfactor,in this i did....
oil filter
oil (shell helix plus oil)
plugs (ngk)
fuel filter
coolant change
thermotwat
coolant temp sensor
engine temp sensor
air temp sensor
and map sensor
thought this would help/cure it, so next day when the car was cold, i drove it and it still had the very light missfire, with a hint of bogging down
so that night i had the diagnostics on it agan for like an hour but nothing seems to be reading wrong it all seems ok
so know im stuck for ideas to what it could be, ive thought of coil pack but it seems strange for that to be causing a fault when just cold id of thought that would be more of a perminant thing?
also headgasket popped to mind could that be something that causes very light missfire when cold? but ihave no mayo in oil cap or any other signs for it to be the headgasket, coolant levels and temps seem perfect, never goes above 1/4 was when driving and only goes to half way when in traffic
has any one got any ideas wat it could be?
chris
about 3 weeks ago it developed a very light missfire when the car is cold, at first it wasnt too bad and you could only just notice it, but then itgot a bitworse over the week, it was due a service anyway so i put it down to that
but i got diagnostics on first anyway just as i was curious to what it could be, and the lambda wasnt reading properly on warm up then when warm it was fine, it was a new one aswell so i just got another on warrenty fitted that and it improved a little but the missfire was still there
so that weekend i serviced it and changed a few of the obvious sensors since they only cost me pennies anyway due to working at a motorfactor,in this i did....
oil filter
oil (shell helix plus oil)
plugs (ngk)
fuel filter
coolant change
thermotwat
coolant temp sensor
engine temp sensor
air temp sensor
and map sensor
thought this would help/cure it, so next day when the car was cold, i drove it and it still had the very light missfire, with a hint of bogging down
so that night i had the diagnostics on it agan for like an hour but nothing seems to be reading wrong it all seems ok
so know im stuck for ideas to what it could be, ive thought of coil pack but it seems strange for that to be causing a fault when just cold id of thought that would be more of a perminant thing?
also headgasket popped to mind could that be something that causes very light missfire when cold? but ihave no mayo in oil cap or any other signs for it to be the headgasket, coolant levels and temps seem perfect, never goes above 1/4 was when driving and only goes to half way when in traffic
has any one got any ideas wat it could be?
chris