Club G40 Forum

Technical => Engine and Transmission => Topic started by: nikky on September 23, 2009, 12:36:00 AM

Title: box\screw on boost pipe
Post by: nikky on September 23, 2009, 12:36:00 AM
hi all :)
could somebody tell what the little black box with a screw thing in it is?
what does it do?
ohh and a missfire at 2k im going to change rotor arm and cap i have done the plugs
cheers
Title: Re: box\screw on boost pipe
Post by: PeteG40 on September 23, 2009, 09:09:03 AM
its the co potentiometer - can alter the co levels, most people say its base level is 550 ohms
Title: Re: box\screw on boost pipe
Post by: nikky on September 23, 2009, 10:29:19 AM
what does it do?
how do i set to 550 ohms
cheers
Title: Re: box\screw on boost pipe
Post by: PeteG40 on September 23, 2009, 10:42:24 AM
its a trim pot and will alter how rich or lean your car runs.

you connect a multimeter over the two end pins in the plug i think
Title: Re: box\screw on boost pipe
Post by: nikky on September 23, 2009, 10:53:08 AM
ahh so thats why im abit rich ;D
il look into it
cheers bud
Title: Re: box\screw on boost pipe
Post by: hayesey on September 23, 2009, 08:18:26 PM
it also has an inlet air temp sensor in it. 

You need to connect a gas analyser to the exhaust to set the CO pot properly but 500ohms - 650ohms is a reasonable base setting for it without access to a gas analyser. 
Title: Re: box\screw on boost pipe
Post by: nikky on September 23, 2009, 11:39:28 PM
im going to my mates mot station and get it on a lambda probe thing and see what its doing
i think il get a g40 chip instead of my g60 one then i can use my g40 injectors as i have 241cc/min at 3bar in now
and a 65mm toothy instead of 63mm