Author Topic: How to test a MAP sensor?  (Read 3677 times)

Offline Andy

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Re: How to test a MAP sensor?
« Reply #15 on: February 27, 2015, 06:28:27 pm »
CO pot is there to trim idle and partial throttle fuelling, so it doesn't have a 'default' setting like the ignition timing - even on a standard G40. Ideally it should be set with the car on a gas analyser once a car has been remapped.

The accepted wisdom is a resistance figure of 550ohms or thereabouts is a good starting point for the CO pot, which gives a bit of adjustment either way (rich or lean) if it's mapped like that - which is what we do.

All you've done is tweak the chip's idle/partial throttle fuelling to suit your engine/turbo combination by altering the CO pot.

CO pot does eventually stop turning, it's just a lot of turns between its min and max settings!

Offline AdzCM

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Re: How to test a MAP sensor?
« Reply #16 on: February 27, 2015, 09:17:27 pm »
That's brilliant Andy :)

Thanks a bunch. I'll let you know how I get on ;)

Adrian