[Gmecm] GMECM

Fri Nov 4 14:29:36 UTC 2005

If it runs bad at first few minutes after sitting a
few hours you have something other than an o2 maybee a
bad vacuum line at the map or an open coolant temp
sensor

--- lostrecep tion <lostreception at hotmail.com> wrote:

> no i do not have a crossover pipe on both sides it
> goes 
> engine>header>pipe>cat>pipe>muffler>pipe>tips
> 
> where does the crossover branch the 2 together
> before the cat after the 
> muffler etc the drive shaft is really obstructing
> the way
> 
> and then after the exhausts are joined where does
> the 02 sensor go
> 
> <BLOCKQUOTE style='PADDING-LEFT: 5px; MARGIN-LEFT:
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> From:  <i>?ke Georgsson
> <papegoj at telia.com></i><br>Reply-To:  
> <i>gmecm at diy-efi.org</i><br>To: 
> <i>gmecm at diy-efi.org</i><br>Subject:  
> <i>Re: [Gmecm] GMECM</i><br>Date:  <i>Thu, 03 Nov
> 2005 08:06:00 
> +0100</i><br>
> <br>
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> lostrecep tion wrote:
> <blockquote
>
cite="midBAY101-F1610A8A5A6BE6CE3E2497FB6610 at phx.gbl">I
> 
> currently have a 1990 Chevy G20 Van. With a V8 350
> 5.7l
> engine ECM 1227747
>   <br>
>   <br>
> its been running fine until i put dual exhaust on it
> now its not
> running well at all the idle is very rough at idle
> and also at slow
> speeds (most notably when its cold out)
>   <br>
>   <br>
> Ive been told by my mecanic i can be a number of
> things but 02 sensors
> seem to always come up as my ecu supports 1 o2
> sensor and with dual
> exhause i should technically have 2 ? Right or
> wrong?
>   <br>
>   <br>
> id like to possibly avoid doing a flash of the
> eeprom as im not totaly
> familiar with it and was hoping that someone may
> know of a solution to
> fix this problem . preferably not a real expensive
> one ive invested
> quite alot of money in this truck and really want it
> running well again
>   <br>
>   <br>
> thanks very much for your help -Mike
>   <br>
>   <br>
>   <br>
> _______________________________________________
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href="mailto:Gmecm at diy-efi.org">Gmecm at diy-efi.org</a>
>   <br>
> <a class=moz-txt-link-freetext 
>
href="http://lists.diy-efi.org/mailman/listinfo/gmecm">http://lists.diy-efi.org/mailman/listinfo/gmecm</a>
>   <br>
>   <br>
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> </blockquote>
> are  they separate or do u have an crossower pipe ?
> u shoud still use
> one  O2 sensor  .  if u not have this crossowerpipe
> between the
> exhausepipes  this p?roblem can come <br>
> <br>
> look at this one att <a
> class=moz-txt-link-abbreviated 
>
href="http://www.summitracing.com">www.summitracing.com</a>
>  <br>
> <h1> SUM-642130 </h1>
> </body>
> </html>
> 
>
<br><p>>_______________________________________________<br>>Gmecm
> 
> mailing 
>
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