BF Turbo missfire after startup

[skotty]

So my car has decided that a missfire about 10-15 seconds after start up is exactly what the doctor has ordered for it! So far I am scratching my head with it as I had done the following... 

 

• Spark plugs genuine
• Coils genuine
• put stock injectors back in
• stock tune file loaded up 
• changed fuel reg
• tried NA fuel reg, map and PCM to rule out a PCM failure

 

I do have a new genuine fuel filter to go in but waiting on flare spanners before I attempt that; I don't want to test fate with my luck of late with this car!.. it starts on all 6, but like I said after what feels like 10-15 sec it will run like a hairy billy goat.. The car hasn't been driven but about 7-8 months but has done a bit of idling here and here.. 

 

No fault codes are being stored, and do a key on, engine on and key on engine off on forscan and its not coming up with anything

I am thinking of trying to hunt down another in tank fuel pump assembly and trying that (surge tank is bypassed for now) but even then that's not making alot of sense to be since it starts on all 6? But when I pull coils, or injectors when its running you can't really isolate it.. Any idea what else to look at? Thanks lads

[Tom Tucker]

Cam sensors, crank angle sensor

[jas98]

If you can't locate missfires but doing what you have done I'm gonna go with low fuel pressure. Is the intank pump fuel pump been replaced before and a rubber hose used? I've seen them split and cause similar issues

[Ralph Wiggum]

Air leak from the intake manifold gasket

 

If you leave it long enough it'll go into closed loop fuel control and will calm down

 

They normaly got right @#1 cylinder due to the heat from the thermostat housing