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Type: Posts; User: mtbraun

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    Correct I have the 1227747 ECM. We're just gonna...

    Correct I have the 1227747 ECM. We're just gonna have to wing it and burn multiple chips if necessary. I can't justify the cost of the APU1 system for this project. What is strange is that the...
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    I understand. What I'm wondering is if we can...

    I understand. What I'm wondering is if we can tune the truck with just the WB, or if the APU1 system is needed to capture the WB data for re-burning. I would like to try to tune with just the WB.
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    I ordered a WBO2 yesterday. Will the datalogging...

    I ordered a WBO2 yesterday. Will the datalogging component you referenced above be required to reburn the chip (if necessary) once I get the WB hooked up? I can't justify the cost of the logging...
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    Thanks for the recommendation. If I hook this...

    Thanks for the recommendation. If I hook this up, can it be incorporated into Tuner Pro datalogging? If so, how is this done?
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    Is there a specific WBO2 you recommend?

    Is there a specific WBO2 you recommend?
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    In addition, I've rebuilt the TBI and the system...

    In addition, I've rebuilt the TBI and the system has both knock and EGR removed and de-programmed from the chip.
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    Help Reading Data Log

    I have completed the TBI conversion and have my rig running almost where I want it. My symptoms are as follows. I have an unidentified stumble off idle that sometimes extends to the 1-2k RPM range....
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    Tuner Pro Connection Issue

    Hello,
    I cannot get Tuner Pro to recognize the cable I have connected. When I launch TP, the dialogue box at the bottom for "DA: is yellow and says "not connected." I have it set to COM 2. It was...
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    So I have to admit a colossal amount of...

    So I have to admit a colossal amount of stupidity. I got the new AFI harness and ECM hooked up, and the SEL still blinks rapidly with key on. So for the heck of it I pulled the SEL and its a...
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    I'm not sure, but my CEL flashes rapidly with key...

    I'm not sure, but my CEL flashes rapidly with key on, but not running. As soon as the engine starts the flashing stops. I've officially pulled the plug on the DIY portion of this project and...
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    Well maybe that's my problem. I just had the ECM...

    Well maybe that's my problem. I just had the ECM temporarily laying in the dash behind the glove box. Lots of metal there.
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    thanks for the insight. What do you mean by...

    thanks for the insight. What do you mean by "grounding the ECM case to the body?"
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    I installed the PROM I got from Dave at Old...

    I installed the PROM I got from Dave at Old School. I also tried an unknown condition stock PROM from the other ECM. No change in symptoms. I retraced the ALDL diagnostic and ground wires, both...
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    Ok so here's where I'm at. When I turn the key...

    Ok so here's where I'm at. When I turn the key on the CEL flashes rapidly and does not stop. I tried another ECM and get the same problem. I also tried swapping PROM chips between the two, no...
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    Ok thanks for verifying. I don't mean to be...

    Ok thanks for verifying. I don't mean to be critical of the resource here, as I am grateful for the plethora of information available to do this conversion. But could this post be modified to...
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    I was able to find another ECM, tried that with...

    I was able to find another ECM, tried that with the same result. I suspected a power issue with the ECM and traced all my wiring to the power relay. I am running two relays, one Bosch style 5 pin...
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    so my local u-pull has a tub full of ECMs but no...

    so my local u-pull has a tub full of ECMs but no 1227747. Are there any quick options available to use a different ECM with my burned chip? I think the answer is no but wanted to double check...
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    I'm going to grab a different ECM. Question -...

    I'm going to grab a different ECM. Question - when grabbing another 1227747, do I need to switch the small chip from the old ECM if the new ECM is not from the same size engine? I have a burned...
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    Update - I corrected my wiring error and...

    Update - I corrected my wiring error and installed the oil pressure switch with its wiring. The tan wire from the oil pressure switch is currently unhooked as this is for the dash display.
    ...
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    I think I may have figured this out. I found...

    I think I may have figured this out. I found another build thread and problem feedback that showed a fuel pump relay diagram. I think the red wire from the fuel pump relay should be left...
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    First Conversion Help Needed!

    I finally got around to installing the harness in my first conversion attempt. I believe I have installed everything correctly based on Eagle Marks writeup and available wiring diagrams.

    I used...
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    Park safety switch wiring on 78 K15

    I have purple and purple/white in my park safety switch plug. My 78 wiring manual says this should be circuit 5 with a yellow wire. Perhaps it was switched. But anyhow, I'm not sure which of the...
  23. Thread: VSS Question

    by mtbraun
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    VSS Question

    A bit confused here about what to do regarding VSS. My first TBI conversion is using a 1227747 ECM and is going in a 78 K15 with a TH350 transmission. Donor vehicle was a 1991 Chevy 1500. I'm...
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    Thanks everyone for your suggestions so far. I...

    Thanks everyone for your suggestions so far. I am using a TH350 so will need to figure out how to adapt the speed sensor to a cable speedo. If you could pm me pics that you feel would be helpful I...
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    First TBI Conversion

    I'm working on my first TBI conversion, with the donor truck being a 91 Chevy 1500. I have the wiring diagram and have been able to trace everything needed for the conversion. I have not started...
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