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Mar 12, 2007 | 11:03 AM

guywithfastcar

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How do you know?

Hey,
I have Mac Mids and a catted y pipe, slp loudmouth 1, o2 sims, and a K and N FIPK, is there any simple way to tell if I am running too lean? I dont really want to spend the money on getting my PCM reprogrammed if I dont have to. Also, the Z has Bosch plugs and wires, should I swap the plugs with NGKs? Thanks guys!

Mar 12, 2007 | 11:33 AM

torlak_t

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From: Istanbul

Quote:

Originally Posted by guywithfastcar

...is there any simple way to tell if I am running too lean? I dont really want to spend the money on getting my PCM reprogrammed if I dont have to...

i also want to know!

Mar 12, 2007 | 11:36 AM

bczee

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Pull and Check the plugs !

Mar 12, 2007 | 02:56 PM

guywithfastcar

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oh thats a good idea, they will be whitish if its running lean right?

Mar 12, 2007 | 03:00 PM

Sluggish

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they will be white and clean...........rich will be black...........

Mar 12, 2007 | 03:13 PM

guywithfastcar

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Awesome, my plugs only have about 5K miles on them.... will I still be able to tell with the short amount of time on them? Also, what plugs do you all recomend... NGK's?

Mar 12, 2007 | 03:15 PM

SeriousPWRTRIP

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From: Brandon, Mississippi

running a similar set up with no tune, no cats, and volant cai... you are more then likely running rich if anything. check your plugs to be sure

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Mar 12, 2007 | 03:40 PM

Sluggish

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From: Fannett, Tx

5k should be plenty of miles to check

Mar 12, 2007 | 03:48 PM

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guywithfastcar

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I appreciate the help guys!

Mar 12, 2007 | 03:51 PM

#11

SSpdDmon

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From: Commerce Twp, MI

A friend with a WBO2 is a much more accurate way of telling. Or...find a dyno day this spring, ask them to hook up the shop's WBO2, and make a couple pulls to see where you're at.