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  1. Replies
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    Great info, thanks. Now to find an early 90s...

    Great info, thanks. Now to find an early 90s caprice cop car.....

    I've definitely considered the MPFI intake option. It seems like the Holley single plane is the only real option still in...
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    Thanks for the info and pics. Interesting info. ...

    Thanks for the info and pics. Interesting info. Something to keep in mind for sure if I happen to see one of those cars at Pick-n-pull. Assuming existing alternator, R4 compressor, P/S pump will...
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    I believe I've hit a show stopper with the stock...

    I believe I've hit a show stopper with the stock Vortec MPFI conversion project. The thermostat/water inlet housing on the manifold has an interference with the serpentine accessory bracket system. ...
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    You might be talking me out EBL. I still think...

    You might be talking me out EBL. I still think there's some benefit, but not sure if it's enough to justify the cost. If it had trans control I think I could much more easily justify. (of course...
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    Thanks, Dave. I'll definitely do some resistance...

    Thanks, Dave. I'll definitely do some resistance testing!




    Thanks for the info and the personal experience. I probably will do as you say: some resistance testing and exterior cleaning.
    ...
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    It took me a couple trips to pick-n-pull , and...

    It took me a couple trips to pick-n-pull , and looking at 3-4 trucks both times, but I finally found the upgraded spider for a 96-99 vortec truck. $37. I think it’s the Delphi conversion the...
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    Awesome thanks! I'll feel more comfortable using...

    Awesome thanks! I'll feel more comfortable using the 7427 with the MFPI mod now.
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    Awesome, thanks! This is great info. I took a...

    Awesome, thanks! This is great info. I took a closer look at the wiring tonight, both existing TBI and the harness from the '97. Looks like TPS might be the same connector, but everything else is...
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    TBI to 96-99 CSFI

    I've posted this question before, but back then I was thinking of using everything from the donor rig: harness and computer included. Several of the good folks here talked me out of that plan which...
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    WTB EBL_Flash II

    Anyone moved on and have one to sell? I think that's going to be next step for my suburban, especially if I decide to go MPFI. I have a 4L80e so I know I'll have to continue with the 7427 PCM to...
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    SOLD

    SOLD
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    your build sounds very similar to mine: 383,...

    your build sounds very similar to mine: 383, vortec heads, GMPP spread-bore (q-jet) manifold for vortec heads, TBI adapter plate, 46 mm TB, etc in a '91, 3/4 ton 4x4 burb. Only differences are cam...
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    Moates AutoProm for sale

    Hi guys, I think I'm going to sell my AutoProm. It is a brand new replacement from Moates. I seem to be having connection problems with my setup with momentary data stream cutouts. Since I've had...
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    Thanks - agreed that I do not want to swing...

    Thanks - agreed that I do not want to swing things too far that would create a lean condition when I step back on the gas. But it will sit there and hang out at 10.9-11.1 or so continuously even on...
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    7427 very rich deceleration problem

    My VE tables are looking pretty good these days and truck is running (seat of the pants) awesome. But I have a very rich condition in deceleration, foot off the gas, TPS=0. I've spent a lot of time...
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    Yep, that was one of the first things Moates...

    Yep, that was one of the first things Moates suggested. I was using the S4 Aries 28 pin (plastic locking lever) - I stopped using it as soon as they suggested I do so, but it didn't help. I have...
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    Was able to procure another 7427 PCM this weekend...

    Was able to procure another 7427 PCM this weekend and it seems to have solved the problem. I took it on a 20 min test drive with simultaneous data logging and emulation, 10k data points. It...
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    Yep, I changed that. But thanks for the...

    Yep, I changed that. But thanks for the reminder.

    Some comments about the ribbon cable from AP to ECM. Moates sent me a replacement when they sent me the new AP. So it's not the cable...
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    Emulation Anomalies with AutoProm

    First of all, it's not the AutoProm itself. I initially went to Moates with this problem and after a number of troubleshooting steps they proscribed, they agreed to send me a new unit. ...
  20. I've just recently discovered this paper and it...

    I've just recently discovered this paper and it is excellent for helping to understand the logic for AE, despite the fact that my application is TBI. Thank you for your efforts in putting it...
  21. Here's the thread with my notes. Pinout...

    Here's the thread with my notes. Pinout attachments are in the first post. I've tried to keep it updated with a few revisions I've made since I first posted.
    ...
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    Moates Awesome Customer Service Experience

    Probably not too surprising for most people on here that have worked with Moates before, but just wanted to give a positive review based on some amazing customer service I just received.

    I bought...
  23. I'm using a Delco AFS74 heated sensor. When I...

    I'm using a Delco AFS74 heated sensor. When I replace I may consider one of these two.



    I have an AEM WBO2, but I think it's a different model. It integrates fine with the 7427; no...
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    Thanks to both of you. Unfortunately I have a...

    Thanks to both of you. Unfortunately I have a leak, at or near the condenser. I bought one of the parts store bottles with the gauge. Zero pressure initially and put some in and quickly figured...
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    No A/C after 7427 conversion

    After I converted to '7427 this summer (from '7060) I noticed the A/C comp was not coming on when selected an A/C mode or defrost. But I had so many things to work out then that I put that problem...
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