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  1. Final post on this matter - after the ECU gave...

    Final post on this matter - after the ECU gave up, I in turn gave up on fighting 30-year-old tech. So I bit the bullet and got a Holley Sniper. It basically is the same as the GM TBI with a...
  2. Always glad to help and let's work together...

    Always glad to help and let's work together wherever it helps! The backfire issue is mostly MAP AE vs. TPS AE, so tedious, tedious woring with the wideband o2 sensor to tune it out without going too...
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    OK, so I should rather focus on getting my AE...

    OK, so I should rather focus on getting my AE settings right, I guess.
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    I have been told that the MS2/MS3 is much faster...

    I have been told that the MS2/MS3 is much faster to react to changes in engine state (like throttle input) than a 7747 Delco unit, making throttle response almost as instant as on a carb. Can you...
  5. My little conversion project made it on Jalopnik!...

    My little conversion project made it on Jalopnik!
  6. You have to provide +5V reference voltage to the...

    You have to provide +5V reference voltage to the knock sensor input. An open wire will be interpreted as constant knocks. Please refer to a wiring diagram for your ECU to find out which pins to...
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    Adaptor Plate for Big Block TBI

    Hi guys,
    I just got my hands on a TBI unit from a 1992 Chevy 454. Which adaptor plate do I need to fit it to my Edelbrock Performer 4bbl manifold?

    Sadly, I don't have space under the hood to fit...
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    As billygraves pointed out to me (thank you!)...

    As billygraves pointed out to me (thank you!) some EU/Aussie ECMs were repackaged US units. Thus, I asked the ECM owner for an interior pic.
    ...
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    Need help identifying ECMHEI

    Hi guys,
    a person I know from a german-language Forum has pulled this ECM from a 1.6l Opel engine with the plan of using it on a Ford. HEI module on the dizzy and the four-digit bin code make me...
  10. Pictures! :)...

    Pictures! :)
    http://pic.armedcats.net/d/dr/dr_grip/2016/05/08/IMG_20160506_130226.jpg


    http://pic.armedcats.net/d/dr/dr_grip/2016/05/08/IMG_20160506_191403.jpg
    ...
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    You only need a new PROM chip. The second chip is...

    You only need a new PROM chip. The second chip is identical on all 7747.
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    -Check power connections: A6 wired to...

    -Check power connections: A6 wired to ignition-switched power (hot in crank and run, NOT crank only) using a relay. B1 and C16 to battery. C9 to crank only is optional.
    -Check the fuel pump relay -...
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    That makes sense! So it slaps on the whole 5...

    That makes sense! So it slaps on the whole 5 Spark Slope degrees when I cross 3.600? That's weird, but I'll have to look out for it.

    Again, thank you!
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    Thank you all! I thought that with setting all...

    Thank you all!

    I thought that with setting all values in the "PE spark added" table to zero I would get rid of PE? Seems like I missed one. Good catch, thank you! :)

    Re - Spark Slope: The tool...
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    HiWay spark should not be enabled at 90+ MAP. And...

    HiWay spark should not be enabled at 90+ MAP. And isn't the amount per 1000rpm only active above 3600 rpm?
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    7747 adding too much Spark - very confused

    I got a very very weird problem - In the logs, I am seeing much more spark than it should accoding to my spark advance...
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    Yep, it's for the 7747... it's a cleaned-up...

    Yep, it's for the 7747... it's a cleaned-up version of a 91 or 91 K-series wiring diagram with everything not needed for a conversion deleted.
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    Did you fit a fuel return line? too much fuel...

    Did you fit a fuel return line? too much fuel pressure will result in an overrich situation.
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    There's a simplified wiring diagram showing only...

    There's a simplified wiring diagram showing only the wires needed for a conversation. I can't find the original source, so I attached it to this post.
  20. Engine has developed a tendency to sometimes...

    Engine has developed a tendency to sometimes misfire massively - first time it occured, she hardly came out of idle, had no pull at all, after a longer full-throttle stint. I was on my way to change...
  21. Reporting back - getting there, even if tuning...

    Reporting back - getting there, even if tuning the TPS AE is a real PITA and involves more trial and error than I generally like. Thank you all for your input!
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    What exactly shall I look for in your logs, so,...

    What exactly shall I look for in your logs, so, what symptoms are you experiencing?
  23. Thank you for the input! So basically, I have to...

    Thank you for the input! So basically, I have to check TPS AE in the affected TPS % range. Will do and report back (my girl told me to take the next weekend off from wrenching, so it'll take some...
  24. Gotta bump this. Still at a loss. Any ideas?

    Gotta bump this. Still at a loss. Any ideas?
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    Soooo.... by-ear update: Not being satisfied with...

    Soooo.... by-ear update: Not being satisfied with how she feels at higher rpm, I decided to give up on the self-imposed 48° advance limit and just see what happens when I let the timing curve move on...
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