Car jerking coz of rich afrs?

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Nov 12, 2017, 03:36 PM

#16

RightSaid fred

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Quote:

Originally Posted by kikiturbo

are you saying mitsubishi engineers dont know how to tune?

When it's stock and unmolested, the numbers are perfect.

If they read wrong it's either because your WB reads wrong at the rich end of the scale OR the fuel pressure is wrong or usually BOTH.

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Nov 12, 2017, 05:28 PM

#17

seeaich

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Quote:

Originally Posted by RightSaid fred

When it's stock and unmolested, the numbers are perfect.

If they read wrong it's either because your WB reads wrong at the rich end of the scale OR the fuel pressure is wrong or usually BOTH.

You've really got a hard on for Fuel Pressure being the reason for all issues...

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Nov 12, 2017, 07:32 PM

#18

RightSaid fred

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Quote:

Originally Posted by razorlab

9.5 on your Wideband gauge or 9.5 in the fuel map?

Two totally different things.

The AFR on the fuel map, that comes from the engine development engineers using an engine dyno which measures mass flows of both air and fuel.
What's displayed converts directly the actual IPW required to make that AFR given the correct fuel pressure.

If you change the fuel pressure, the AFR is automatically wrong.
If you tune it wrong to try to get around the wrong fuel pressure, you also get it wrong.
When the WB reads wrong..........it's wrong.

If it's tuned right......the numbers will be the same.

Last edited by MinusPrevious; Nov 13, 2017 at 08:00 AM. Reason: Insult removed

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