Trouble Starting And Idling On Cold Startup

[LTHLRB]

Over the past week or so my car hasnt had the best idle and always takes a few tries at starting it, its like it loses its cold startup tune and idle when 1st started. Any ideas why?

[danielson]

if you turn it off and try to start it again once its warm does it still play up?

[LTHLRB]

at times, like it tries to crank over then starts then tries to die out, crank it over again then it tries to die out, give it some fuel and it idles fine.

[R33S2]

Can be alot of things, my first suspect would be spark plugs, cold starts need a bit more fuel.

[LTHLRB]

brand new laser platinum ngk. 2,000 kz old.

At times when i start it, it sounds like its got some massive cams, really lumpy and off note. Engine isnt pinging and timing has been advanced aswell as a tune.

[Andyn]

I have the exact same issue as you and I have just replaced my spark plugs with new ngk iridium ones.

Still have the same issue. Would be interested to hear other possible causes. Fuel pump? (it seems like it's thirsty for fuel). When I give it a bit of throttle as I start the car it is fine.

[LTHLRB]

my car gets heaps of fuel i got a 500hp pump. on dyno the a/f ratio was at 11 - 12.5 at 7,000rpm and made 205kw. So its got pech. I think its the cold startup tune.