I'm thinking the main difference between the 19186079 and the 16147525 is obviously the hexadecimal address in the chip and the associated electronics inside the computers.

For example,
1987 ~...

Interesting thread:

http://www.gearhead-efi.com/Fuel-Injection/showthread.php?7284-Looking-for-a-ECM-for-a-old-GMC-Topkick&highlight=16147525

19858
The installation of the GM2 likely OK. The soldering required for the GM2 is basic through hole soldering. An ohm meter can be used to test for solder bridges between pins, which might cause...

ECM 16147525 Uses a 4K chip, 24 pin. Is this original computer part number and chip for your Topkick?

The 27SF512 chip is a 64K chip, 28 pin. What chip adapter 24 pin to 28 pin is being used?
...

When an engine briefly runs after pouring fuel into the throttle body indicates a fuel problem.

Possibly the rapid flashing check engine light is bad chip.

I favor troubleshooting the rapid...

I posted the files in the linked thread, which I personally verified before posting them.

I'm curious what the Noid light testing for the injector wiring revealed?

I am hoping someone might know how many Pulses per Mile the 6L80E REPLICATED TOS SIGNAL Pin 16 is?

Maybe 4000 / 8000 / 16000?

Thanks in advance,

dave w

Are the posted instructions for the AEM 30-4110?

The AEM 30-4110 is Plug-n-Play with the '7427 WBO2 setup, no calibrations / no adjustments are required.

:welcome:

What engine are you planning to put a turbo on?

:welcome:

Installing a chip that has been programmed with the edits is required.:thumbsup:

http://www.gearhead-efi.com/Fuel-Injection/showthread.php?391-1227727-1227730-ECM-Information-A1

I think using a ‘7730 / ‘7727 V6 Memcal is a good plan.

Link for WBO2 tuning using the 16197427 PCM: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?5381-WBO2-Tuning-Spreadsheet

19825

I think a 4K VSS is a very poor option because the Speed Pulse Per Rev number will be extremely low. The 8K VSS already has a low Speed Pulse Per Rev number and is likely the lowest cost option too.

Chip code BBNT is for a 1993 4.3 CPI, definition $E6

19818

19820

I used a budget friendly Digital Dakota 8K VSS. The Speed Pulse Per Rev will be very ODD with the 8K VSS

19816

7 Pin Module, the 8 Pin Module is similar.

The Reluctor / Pickup Coil produce a small AC signal when the distributor shaft is spinning. Perhaps a wobble / harmonic between the Reluctor / Pickup...

Gearhead-efi link for TBI Injector Flow Rates: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?81-GM-TBI-Injector-size-color-and-part-numbers

It appears to me that the starter solenoid sends a voltage to the computer that the engine is being started cranking.

Updated VE Correction Excel Spreadsheet with Avereragifs for Closed Loop Only.

Sample Open-Source formulas:

=AVERAGEIFS('Pasted CSV'!BE:BE,'Pasted CSV'!CN:CN,">=37.5",'Pasted...

The fuel pump relay actually has 3 high side connectors, that allow for Normally Closed contacts and Normally Open contacts.

The fuel pump power is connected by the Normally Opened contacts.
...

The fuel pump relay wiring described above seems odd to me.

Typically, the fuel pump wiring high side gets battery+ from a wire with an inline fusible link or a fuse that eventually is connected...

It appears the connector pictured is for an ATC fuse, see link below. Pink wire with a Black stripe is typically ignition "ON". Not sure what the tan/white wire is for.
...

The ECM needs to know when the fuel pump is "On" / "Fuel Pump Signal" The wiring for the "Fuel Pump Signal" is spliced into the power wire going to the fuel pump.