[Gmecm] Preventing code 34

[Mike Poore]

The problem with this approach is that the MAF tables are near the 
maximum in stock condition. I have tweaked the fuel side to the point 
that the BLM is consistently in the 126-128 range. But, under certain 
conditions, code 34 is triggered and it seems to be due to lower than 
expected voltage. It seems to occur when I rev the engine and close the 
throttle rapidly. I assume the MAF voltage drops to near nothing when 
the throttle plates close rapidly. It's hard to tell with this ecm 
because the baud rate is so low.

Mike

Mark Romans wrote:

> Hi Mike:  You need to rescale your maf sensor.  What you need to do is 
> slowly add load to the engine
> and monitor the grams/sec and adjust that part of the maf table so 
> that the BL stays at 128.
> You will need to stay out of power enrichment for this to work.
> Then you will have your new maf transfer table done and your car 
> should run well.
> Mark
> ----- Original Message ----- From: "Mike Poore" <mp at FlowersByValerie.com>
> To: <gmecm at diy-efi.org>
> Sent: Sunday, March 12, 2006 2:22 PM
> Subject: [Gmecm] Preventing code 34
>
>
>> My oversized MAF is apparently putting out too low a voltage for the 
>> ecm. I have been able to compensate on the fuel side for the lower 
>> voltage, but code 34 keeps being set. Is there a setting to prevent 
>> code 34 completely, or any other options? Once the code is set, the 
>> engine continues in closed loop, but is it operating the same way as 
>> if the code was not set?
>>
>> 85 L98 MAF system
>>
>> Mike
>> _______________________________________________
>> Gmecm mailing list
>> Gmecm at diy-efi.org
>> http://lists.diy-efi.org/mailman/listinfo/gmecm
>>
>
>