need help with block learn

[jamielisa14527]

I had a scanner pluged into my car and the block learn is 150 and the interg. was 128. Is the block learn number too high ?

[Keller]

In short, yes.

You mentioned you had larger aftermarket injectors, correct? Do you have a chip cut to match them?

[jamielisa14527]

they are real close to stock. they are 32 or 34 lb injectors. I had the same issue with stock set up.

[bmackinnon]

sounds like a vacuum leak is allowing unmetered (not read by the maf) air into the engine, causing the o2 sensor to read a lean (too much air) condition and forcing the ecm to add fuel (high blm).... common symptom of a fairly severe vacuum leak.... start searching for the leak.... has been known to be frustrating to some....

fyi - stock injectors are 28 lbs.... hopefully you have a chip to match your injectors? In any case, having larger than stock injectors with a chip for smaller injectors (stock) would cause a low blm.... as the ecm would be pulling fuel due to the higher flow thru the larger injectors... just sayin'

[kenmosher]

When folks say "match your injectors" it's not a matter of simply matching the static flow rate (say 32 lbs/hr, for example). It needs to match the characterization of the injector. Injectors have a set of characteristics that drastically alter the way the ECM needs to deal with them to deliver the proper fueling, such as on time response, off time response, dynamic flow, response to voltage, flow linearity, gain, offset, etc.

As we have seen, there are often different "flavors" of a particular flow rating from different manufacturers (and sometimes even within the same manufacturer's line from different OEM applications).