Can anybody tell me how do you set the air flow mixture up on a St185.
My Celica appears to be running a bit rich.

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Exup

If it's a 185 they normally do run rich.

For idle & cruising it should automatically run closed loop from the lambda sensor and will be fairly accurate.

You shouldn't attempt to tweak the AFM unless you have a wideband sensor & gauge. If you go too weak on boost you'll blow the engine - especially if you have a top mount air to air intercooler as you will have high charge temperatures as well.

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If at first you don't suck seed, try drier grain.

Thanks for your help.

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Exup