running lean...why?

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Apr 12, 2003 | 02:55 AM

SSactionLs1

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From: nor cal (ripon)

running lean...why?

at the dyno i was at 14.7 a/f ...i thought with the headers id be rich if anything....a MAFT is on the way but can some one tell me why my mods will cause a lean condition??.. im confused..unless my TNT ring and bellows have a hole

Apr 12, 2003 | 08:31 AM

BLK02WS6

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From: on the dyno tuning in MD

Re: running lean...why?

Probably MAF ends.

Apr 12, 2003 | 04:30 PM

NoGo

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From: Mass

Re: running lean...why?

ditto on the MAF ends.

Vacuum leaks actually have a tendancy to make the car run richer at WOT. The vacuum leak jacks up your LTerms. The car adds your Lterms onto the WOT fueling, and you end up richer.

Good Luck,
Kevin

Apr 12, 2003 | 07:02 PM

speedy101

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From: Bethany, ok

Re: running lean...why?

What do you mean MAF ends?
thanks,
chris

Apr 12, 2003 | 08:47 PM

Slowhawk

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From: Bridgewater,Ma

Re: running lean...why?

<blockquote>quote:<hr />Originally posted by speedy101:
 What do you mean MAF ends?
thanks,
chris <hr /></blockquote>Whisper MAF ends in your sig <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Did you verify the dyno A/F was correct?Sometimes when the sensor is going the A/F will start reading higher.

Apr 12, 2003 | 08:57 PM

SSactionLs1

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From: nor cal (ripon)

Re: running lean...why?

<blockquote>quote:<hr />Originally posted by Slowhawk:
 <blockquote>quote:<hr />Originally posted by speedy101:
 What do you mean MAF ends?
thanks,
chris <hr /></blockquote>Whisper MAF ends in your sig <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Did you verify the dyno A/F was correct?Sometimes when the sensor is going the A/F will start reading higher. <hr /></blockquote>how the hell do i check if the dyno is right? <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

Apr 12, 2003 | 10:15 PM

Slowhawk

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From: Bridgewater,Ma

Re: running lean...why?

You'd now if the next car is lean and so on.I had this happen last year,my car showed lean,then the next car was leaner,then the A/F died after that.
Just a thought.