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Old 06-06-2007, 01:06 AM   #1
WeldingHank
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Join Date: Oct 2005
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Location: Lawrence,ma
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PSM

Default low boost, running lean

noticed while tooling around the other day, that my A/F had gone leaner than normal (as observed by LC-1+gauge). I took some logs tonight and saw that my boost is lower than normal (normally 18.2, most seen is 16.8)My normal full load AFR is between 11.3 and 11.5. I'm getting a consistent 11.9-12.0. My fuel trims are +/- 3-4% also. I figured a possible intake/boost leak, but my fuel trims would look all weird. And I would figure an exhaust leak would make my LC-1 read rich as exhaust gas escapes. Any insight?
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Old 06-06-2007, 01:14 AM   #2
Zumble
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Boost leak = less boost = less load = leaner afrs if the particular load site you're hitting with lower boost calls for leaner afrs.
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Old 06-06-2007, 09:01 AM   #3
WeldingHank
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thats the thing, i checked the load sites, and the AFR isn't much leaner than my full load AFRs.
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Old 06-06-2007, 10:39 PM   #4
blkscooby
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Cammed, sprayed, stalled

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Your boost may be lower simply from the warmer weather. Perhaps your AFR being off is simply due to a change in fuel? More ethanol content? Just throwing out ideas.
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Old 06-06-2007, 11:29 PM   #5
hondaeater69
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1998 RS

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are you hitting differnet load cels? differnet MAFv?
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