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throwing lean codes.

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Old Dec 22, 2002 | 01:27 AM
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Default throwing lean codes.

I got my car Dyno tuned a 3 weeks ago. I was coming home from up in Sac. to San jose, everything was fine, let the car sit for about 5 hours, went out, S.E.S light pops on,check it, said I was LEAN on Bank 1, and Bank 2. So I clear them, the light comes back on a couple days later. Been going on for about 3 weeks, same codes every time. What could it be????

Thankx for ur help.
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Old Dec 23, 2002 | 07:00 AM
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Default Re: throwing lean codes.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sscamaro387:
<strong>I got my car Dyno tuned a 3 weeks ago. I was coming home from up in Sac. to San jose, everything was fine, let the car sit for about 5 hours, went out, S.E.S light pops on,check it, said I was LEAN on Bank 1, and Bank 2. So I clear them, the light comes back on a couple days later. Been going on for about 3 weeks, same codes every time. What could it be????

Thankx for ur help.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Back to the dyno...
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Old Dec 24, 2002 | 01:05 AM
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Default Re: throwing lean codes.

ya i know, but is there anything i can do b-4 i go back, cause i m going back the first sat. of jan.
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Old Dec 24, 2002 | 09:41 AM
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Default Re: throwing lean codes.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sscamaro387:
<strong>ya i know, but is there anything i can do b-4 i go back, cause i m going back the first sat. of jan.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Change out the fuel filter and verify adequate fuel pressure at the rail, preferrably the B2 side, as it is the most restricted due to the crossover on top of the manifold.

Else, I'd park it. Running lean in FI is an automatic death sentence for gaskets and hard parts..

Let us know what happens.

SC-
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Old Dec 24, 2002 | 01:10 PM
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Default Re: throwing lean codes.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SS00Blue:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sscamaro387:
<strong>ya i know, but is there anything i can do b-4 i go back, cause i m going back the first sat. of jan.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Change out the fuel filter and verify adequate fuel pressure at the rail, preferrably the B2 side, as it is the most restricted due to the crossover on top of the manifold.

Else, I'd park it. Running lean in FI is an automatic death sentence for gaskets and hard parts..

Let us know what happens.

SC-</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">ya already changed the filter, about 1K ago. and i orderd a mech. fuel pressure gage, and regulater. So can i run that off the Bank 2 side? Also the light went off last nite, just out of the blue.
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Old Dec 24, 2002 | 03:30 PM
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Default Re: throwing lean codes.

Sounds like the MAF Tuning/Tables are off.
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Old Dec 24, 2002 | 04:10 PM
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Default Re: throwing lean codes.

Quick check, My buddy had the same code and it turned out being that the car was tuned with a after market MAF. he put the stock back on, Light hasent been seen yet!!!!
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Old Dec 25, 2002 | 12:31 AM
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Default Re: throwing lean codes.

maybe slap a maft on it short term and turn it full rich base
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Old Dec 26, 2002 | 09:01 PM
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Default Re: throwing lean codes.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Noyzee:
<strong>Quick check, My buddy had the same code and it turned out being that the car was tuned with a after market MAF. he put the stock back on, Light hasent been seen yet!!!!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">the MAF is still the stock one.
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Old Dec 26, 2002 | 09:30 PM
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Default Re: throwing lean codes.

The lean codes are a by-product of the ATI fresh air setup.(more than likely)

Do some searches on here with some of these terms: ATI, lean, MAF relocation, PCV, blow thru, pull thru. They should get you plenty of reading material to see what is going on. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I'm too tired and don't remember all the details to explain things right now but, the search will help. <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" /> <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

John (One of the original ATI guinea pigs <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> )
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Old Dec 26, 2002 | 09:34 PM
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Default Re: throwing lean codes.

Hey thanks, I appreciate it.
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Old Dec 29, 2002 | 07:19 PM
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Default Re: throwing lean codes.

Well the SES light went off by it's self, and has been off for about a week now.car still dying/surging at stops.
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