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Thread: New to site and efi

  1. #1
    Fuel Injected!
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    New to site and efi

    Hello all & thanks for the add. My name is Frank. I'm from southern ohio( bout as far south as you can go without hittin water)My current project is a 72 k5 blazer. I plan on swapping from carb to tbi.

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    Super Moderator dave w's Avatar
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    dave w

  3. #3
    Fuel Injected!
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    Thanks Dave. I just hope I don't sound too ignorant lol. My tbi swap consists of a setup out of a 94 c1500 350/4l60 e ecm 7427 & harness. I want to install this set up in my 72 k5 350/5 spd. What problems will I run into? I had a Holley projection(analog) setup on my old 69 c10 a couple years back,it was a definate improvement over the quadrajet, but had its problems also. I could never get it tuned quite right, but like I said it was still an improvement.

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    Super Moderator dave w's Avatar
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    Quote Originally Posted by ta2ed View Post
    Thanks Dave. I just hope I don't sound too ignorant lol. My tbi swap consists of a setup out of a 94 c1500 350/4l60 e ecm 7427 & harness. I want to install this set up in my 72 k5 350/5 spd. What problems will I run into? I had a Holley projection(analog) setup on my old 69 c10 a couple years back,it was a definate improvement over the quadrajet, but had its problems also. I could never get it tuned quite right, but like I said it was still an improvement.
    The '7427 TBI computer is an excellent computer! I strongly recommend using a Vehicle Speed Sensor (VSS) with the '7427! The original equipment 94 C1500 used a Digital Ration Adapter Controller (DRAC) or sometimes called a Vehicle Speed Sensor Buffer (VSSB) with a 40 pulses per drive shaft revolution VSS. The '7427 can be re-wired to accept a 2000 pulses per mile speedometer driven VSS, which will reduce cost and save some headaches.

    dave w

  5. #5
    Fuel Injected!
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    Ok, I have a few questions....quite a few actually and am not sure where to go or who to ask. I need to know what all wires I can cut out of the harness. Also how or will the automatic trans control in the ecm affect the engine function or is it able to be deleted?

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    Super Moderator dave w's Avatar
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    Quote Originally Posted by ta2ed View Post
    Ok, I have a few questions....quite a few actually and am not sure where to go or who to ask. I need to know what all wires I can cut out of the harness. Also how or will the automatic trans control in the ecm affect the engine function or is it able to be deleted?
    I apologize in advance for using Acronyms, you will need the following wires:
    TPS
    IAC
    CTS
    ESC
    EST
    KNK
    INJ
    VSS
    MAP
    Fuel Pump Control
    ALDL
    SES

    Lots of information, including wiring diagrams on this link: http://www.gearhead-efi.com/Fuel-Inj...Information-0D

    Program the PROM for manual transmission if you plan on using TH350 / TH400.



    dave w

  7. #7
    Fuel Injected!
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    Thank Dave!
    i will be using a manual 5speed trans. So will not need the trans controls, next question... How do I go about getting prom programmed for manual trans? I am totally lost in that area. Also the other problem I am having is on the pinouts, everything I find is showing the red connector as a & b 1 through 16, which I get, but on blue connector all I find is pin 1-32. Am I looking at the wrong thing or.......? Sorry for all the questions. Thanks for your patience, it's really appreciated!!!

  8. #8
    Super Moderator dave w's Avatar
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    The secondary locks (Blue / Gray things inserted into the blue / red connectors) need to be removed from both Red and Blue connectors to see the correct letters on the connectors. The letters on the secondary locks are not correct.

    I use TunerPro RT, a Moates.net Burn 2 and a Moates.net G1 adapter board to program / replace the PROM on a '7427 computer.

    dave w

  9. #9
    Fuel Injected!
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    Thanks for the info on the connectors. Now on the eprom is there someone that reprograms these? I am lost when it comes to computer programming, my computer skills are basically non existent.
    Thanks again
    Frank

  10. #10
    Super Moderator dave w's Avatar
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    Hi Frank,
    There are several members, including myself, that can help with custom programmed PROM chip. We have a Buy - Sell - Trade - Wanted section http://www.gearhead-efi.com/Fuel-Inj...l-Trade-Wanted You can send a Private Message (PM) to a member directly about helping you with a PROM Chip, or post in the Wanted section.

    In general, there are two types of PROM Chips, Tuned or Modified with varying prices. A tuned chip is recommended for a modified engine. A tuned chip modifies the fuel and spark tables to achieve the best possible performance using data logs. A modified chip is basically a stock chip (stock fuel and spark tables) with modifications to parameters to work in a reto-fit applications like yours. The modified chip usually removes emissions, sets up transmission type (4L80E / 4L60E / TH350 / TH700R4 / TH400 / Manual ) and other parameters for a retro-fit application.

    dave w

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