Tunerpro RT $4F connection problems

[duecepipes22]

Hi Guys, I'm another newbie to this but working my way up the steep learning curve thanks to your help! I have a '91 350 TBI with a 1228747 comp. I've data logged with WinALDL using the 7747 because it doesn't have the 8747 option on it. While doing logging with WinALDL I found that I'm running pig rich with all my BLMs between 100 and 115. I had a custom chip burned for it a while back but when he burned it, I had a bad TPS (the voltage started dropping after half throttle) and a weak fuel pump (the pressure dropped from 12 psi to 9 under a load.) I also found from datalogging that I have a high knock count at 800 RPMs and the MAP at 65. Is this likely a false knock and is it retarding my timing? I don't know what my base timing is at but does the truck run the base timing at idle or only until it goes into closed loop? When he burned it, he did some soldering so I'm assuming I have the extra 2 pins now to use an EEPROM chip?? Do I just need to look on my chip for a number to see what I have?

ANYWAY, I tried using the $4F mask files and other files found on here (thanks for your work on them) but I can't connect to tunerproRT with them. I am able to connect with the $42 mask files though. My other question is, when I am using TunerproRT I need to put the 10K resister between pins A and B on my ALDL cable but when I do it, my idle increases and stays about 500 higher. However, if I use WinALDL if I have the resister in that position, it doesn't read the BLMs, I have to have it in the "normal" position for it to read. Last question, does anyone have a recommendation, given what I have, for what to use to burn chips once I get to that point?

Sorry this is so long, but I'm lost and have a lot of questions! Thanks in advance!

[EagleMark]

We had those $4F xdf and adx files working so I don't know what the issue is? No 10K... that will put it in ALDL mode. It's almost indentical to $42, one item differant.

Until you read the bin file on chip only your tuner and God knows what's there?

Base timing is what you set distributor at and then set it in bin, until you know what's in bin you should run stock 0 degrees with timing light and timing bypass wire disconnected. When connected it is computer controlled to timing table.

For chips and burner and adapter look at Moates.net

[duecepipes22]

Thanks for the reply and all of your work on here! So can I just use the $42 files and everything should work fine? If I don't use the 10K, it won't connect to tunerpro or atleast I couldn't get it to.

Do I need the chip burner to read the bin file on the chip or can I read it through tunerpro?

I'll check my base timing as soon as I can get my hands on a timing light. The guy that burned my current chip never bothered to find out what my base timing was. He used his snap on scanner tool so I think he just adjusted my fuel tables and advanced my timing a little. In fact, like I said, he managed to burn it without realizing that my TPS was completely shot.

I've been looking at the stuff on Moates but wasn't sure if there was something that you would recommend? Do I still need an adapter if the guy that tuned it already was doing some soldering on the ecm? He said he had to add a couple of pins to use a newer style chip... thats all I know. Thanks again!

[EagleMark]

This topic has come up recently about 10k for 160 Baud ECMs. Not sure about all 160 Baud ECMs but I just went and did some testing on my 1990 Chevy Suburban 1227747 $42 and 10k is not needed to start data flowing with a cable or the AutoProm. AutoProm in AutoProm Mode and Pass Through mode work fine with no 10k. Cable works fine with no 10k. Using 10k on AutoProm or cable puts ECM in ALDL mode which increases idle, spark and who knows what else making tuning and accurate data logging impossible.

Also tried the $4F-1228747-LD-V1.1.adx‎ and it worked fine with no 10k and 10k put it in ALDL mode. There is a Light Duty (LD) and a Heavy Duty (HD) adx file for this ECM.

Looked at ALDL files and no indication of 10k needed to start data flow.

Using either of those ALDL files or the $42 file I doubt you would ever notice the difference?
$42 = #6 HIGH BATTERY VOLTAGE
$4F LD = #6 1ST TIME IDLE FLAG 0 = FIRST TIME
$4F HD = #6 HIGH BATTERY VOLTAGE-DISABLE MCU SOLENOID DISCREETS

If you can not get data to flow with your 1227787 ECM and the $4F file above then use 10k to start data then disconnect and let us know how it worked?

You do need a burner to read the chip, if you get the Burn 2 or AutoProm from Moates they are built into TunerPro.

If you have a modified chip installed in your ECM then chances are it can be plugged into a burner and erased and re programmed.

My choice is the AutoProm. It is a chip burner, cable for data logging and an Emulator in one package. The Emulator lets you tune your bin file while open in TunerPro Real Time. When done burn a final chip. Since you already have a cable, if you only want to make small changes one at a time, burn chip and test/data log then a Burn 2 would do. But if you wanted to Emulate later then you would need an Ostrich as well. AutoProm is all three, cable, Burn 2 and Ostrich.

[RobertISaar]

you know what would possibly be a good project? taking any ECM that requires a 10K for whatever reason, removing the requirement from the algorithm and just having it stream full speed at all times.

[EagleMark]

I guess that would work. Don't know why it's there in the first place? Maybe to save processor speed?

Don't even know what ECMs need it?