Idle adjust screw std seting

Tedsmx5 · Postby **Tedsmx5** » Mon Jan 26, 2009 12:38 am

Can someone tell me how many turns out the " Idle adjust screw" is set to on a standard NA8?
I have a aftermarket ECU and would like to setup the air screw to use the same (standard) adjustment range.
Ted

93_Clubman · Postby **93_Clubman** » Mon Jan 26, 2009 2:17 pm

Various pubs just talk about turning the screw to get 850rpm +/-50rpm idle with the GRN & TEN jumpered in the engine bay diagnostic box. However, from when I partially dismantled & cleaned the TB on my NA8, the screw was around one turn anticlockwise from full clockwise, so screw it all the way in & back-off one turn as a starting point to fine tune idle. From memory, I've read idle is usually found between one & one & a half turns, but mine was less than one turn. <www.miata.net> might be able to shed more light.

Tedsmx5 · Postby **Tedsmx5** » Mon Jan 26, 2009 4:36 pm

Thank you that’s all I need. I'll adjust mine to one turn then use the Idle adjust in the ecu to bring my idle up to 850-900rpm, this is so the PWM signal is of a similar rate to the standard ecu. :?:

Clear as mud I think :lol:

sorry.
Ted.