[Gmecm] GMECM

[Åke Georgsson]

lostrecep tion wrote:

> I currently have a 1990 Chevy G20 Van. With a V8 350 5.7l engine ECM 
> 1227747
>
> 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)
>
> 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?
>
> 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
>
> thanks very much for your help -Mike
>
>
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>
>
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

look at this one att www.summitracing.com 


  SUM-642130

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