Hi All,
Whilst this has only happened 3-4 times over the past few weeks I figured I would see if anyone else has had a similar issue so I can catch it early before it ends up with me being stranded or causing some damage. The car is a 2006 Mazda 6 MPS.
Upon attempting to start the car after being dormant for several hours (e.g. overnight), the intiial attempt to start has failed with the engine cranking over briefly, then conking out. It has always started fine on second attempt, several seconds later, although something i found strange was that rather than going to the standard cold start idle (of about 1900 rpm), instead it idles at around 1100-1200 rpm before dropping to normal idle.
From a battery point of view it seems to be fine and it doesnt sound like its struggling to crank from a flat battery ( i will test voltage when iget some batteries for my multimeter but am confident its not battery related).
I replaced the spark plugs, oil, oil filter and air filter recently (<10k ago).
My first thought was this was due to me being to quick to start the car before the fuel pump builds up pressure after dropping overnight however today it happened again after leaving the key in the on position for a few seconds (pretty sure I can hear the fuel pump going off).
Has anyone else had similar symptoms? or do they know what might be the cause?
The strangest thing to me is why it idles at a lower revs on cold start when this happens. Other than the few times this has happened the car seems perfectly fine.
Any guidance would be much appreciated.
Cheers