Backfiring when starting cold - too rich or too lean. - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-07-2009, 04:12 PM   #1
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Default Backfiring when starting cold - too rich or too lean.

Hi,

I lately did some changes to my cranking / priming tables. Now I do get a backfiring when I start the car in cold wheather (after standing for a day or so - engine cold, outside temp ~12-15C) - car starts good after that and also when it's warmed up.

What to look for? Priming tables, cranking tables? Too rich or too lean?

Thanks for your suggestions.

Oh and it's a MS2Extra btw. (but I don't think really that matters...)

Greets and thanks
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Old 10-07-2009, 04:14 PM   #2
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rich
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Old 10-08-2009, 01:06 AM   #3
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Thanks - priming or cranking?
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Old 10-08-2009, 03:24 AM   #4
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If the backfire is in the intake, it's too lean...
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Old 10-08-2009, 09:33 AM   #5
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I would also say lean if coming from the intake.
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Old 10-08-2009, 11:48 AM   #6
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It's in the exhaust.
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Old 10-08-2009, 11:49 AM   #7
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just lower the cranking pw at that temp.
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Old 10-08-2009, 12:52 PM   #8
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Worked, thanks!
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