I have a Miata Turbo mk2 2000 1.8 with a turbo and Go tech PROX standalone ecu.
It's running a 36-1 trigger wheel with a MAP sensor only (no TPS) .
The problem I am having is that it won't start the first time ( second time ok). I can start it on the key but never the first time from cold. From warm it is ok.
its takes about 5-6 turns when it does start.
Last week I have changed the spark plug and HT leads.
I have discovered that the bottom of spark plug number 1 was covered in oil.
Since changing it, it now runs better but the coldstart problem is still there.
I beleive its one of 3 things:
When they changed the oil it they overfilled it and it went down spark plug number 1.
Or, the rocker cover gasket has gone
Or, the piston Rings has gone.
I have noticed that the oil level is pretty high. So i will need drain that.
The battery is measuring at 12v so i dont know if thats a problem.
I have change the settings relating to the cold maps and start up fuel but it doesn't help.
I wil hapilly send people my map to view it offline if they wish.
Please go to:
Another problem I am having is that as I am driving the car hovers around 1500rpm untill the car comes to a complete stop then it comes down to 1000rpm.
I occasionally like to coast downhill so when I press the press the clutch i like it to drop down to idle speed not hover around 1500rpm.
Any thoughts or observations is greatly appreciated.