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Engine idling fine with 50's Map value but weird injector bpw now

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Old Oct 12, 2007 | 09:46 PM
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Car: Used to drive a camaro
Engine idling fine with 50's Map value but weird injector bpw now

First, thanks again for the past help with getting the Map values down from 80's to a more comfortable low 50's while idling. I fixed that by adjusting the VE tables and BPC.
Now the new hurtle. If I crack the throttle blades and raise the RPM's from idle to a "stab" I get what I believe is a lean pop and not a rich pop in the exhaust. Looking at the attached .csv file attached I see at those instances 2 things. AFR is in fact lean according to my widebands input and injector base pulse width has not really changed throught the almost 10 minute log. The msec's are around .7 I'd think I'd be seeing values much higher especially when cracking the throttle blades open. Any ideas looking at the log? I suspect either something in the AE tables or simply bpw change. I'm using the 749 ECM, 730 harness repinned, $59 code and tunerpro RT (which I'm registering here soon...great product)
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Old Oct 12, 2007 | 10:27 PM
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Engine: 3xx ci tubo
Transmission: 4L60E & 4L80E
Re: Engine idling fine with 50's Map value but weird injector bpw now

That BPW sounds like it is "in range". Most ECMs report the BPW before the low BPW offset is added. Both the $58 and $8D do this. I had a BPW reported via the ALDL of 1.2ms at idle with the $58 code and 42#/hr injectors. The $8D reported 1.2ms also. I changed the code to report the actual BPW sent to the injector driver with low BPW correction and voltage correction. The 1.2ms ALDL value the stock $8D reports is an actual 1.8ms to the injector.

It sounds like you are getting close to taking it for a spin?
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Old Oct 13, 2007 | 10:57 AM
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Re: Engine idling fine with 50's Map value but weird injector bpw now

Junk, thanks for the info. Is there info onsite that I could search to edit the $59 code to report the same way? I'm using my AFR obviously to "give the engine what it wants" but would like to make sure DC doesn't get too hight for the injectors. I'm sure I'm a far bit off from maxing them out but again, better to have visibiility than to be trying to tune blind.
I might be taking her out today for a spin or 2...or 3 or 4. I have to break in my Strange 12bolt per their recommendations, 50mile trips with time to cool off in between for a total of 1500 miles. Then change the rear oil and good to go.
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