High Block Learn

[Don Burns]

Thanks for the reply, Dennis. Fuel pressure is running
better than 41lbs, no evidence of injector leakage. Chip
is stock, mild. Vacume is 20+ and seems to be well regulated.
Car seems to be running pretty decent, lots of power.
But a quick look at the plugs suggests its seeing too much fuel.

This is what has me scratching my head.

Don


DenniS wrote:
>A 160 BLM is saying you are running way lean and the
>ECM is trying to compensate. First  Iwould try more
>fuel pressure.  Maybe throw a FP guage on your window
>and see if the fuel pump is ok.   Anything falling
>under 38lbs its somthing is wrong. What Chip are you
>running in your ECM?  Custum or stock.
>what happens is the BLM tries to compensate for hte
>int.  if the int is high (lean) the blm goes up to
>bring the int back to 128 . 160 BLM is the max the ecm
>goes to. so I would definately look into this ASAP.
>How does the car run. maybe you have a serious vacum
>leak.  Check the basics.
>Dennis
>http://geocites.com/bowtie8
>--- Don Burns <donburns at macconnect.com> wrote:
>> TPI EFI Experts,
>>
>> I am seeing a block learn value of 160 on my 350TPI.
>> Integrator seems
>> reasonable running 128 to 135. The 160 block learn
>> figure is difficult to
>> move, at least under no load conditions, and the
>> only way I have been able
>> to force it to change (downward) is to disconnect
>> the MAP sensor. No codes
>> are being set. O2 and MAP sensors are OK.
>>
>> Fuel consumption sucks (12MPG), which is why I am
>> looking at this to begin
>> with. Could this be an ECM problem as opposed to a
>> sensor issue?
>> Thanks.
>>
>> Don Burns
>> Fort Lauderdale FL   USA
>> 86GT 350 TPI


----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org