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Thread: amc 304 conversion

  1. #1
    Carb and Points!
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    amc 304 conversion

    Hello
    I wrote this in my introduction but i think more members will read it here and i fear it will become a longer thread.
    I have a Jeep CJ7 with the 304 engine, i want to implement a tbi systemof a chevy astro ."I could get my hands on the TBI injection system of a chevy with 4,3l engine and automatic gear.I could grab nearly everything without the VSS. The ecu is the 161 96395. So what do you think,can i implement this system in my Jeep?
    Problem i have right now is, i can not get contact to the ecu with usb ttl cable and all the diagnostic programms i have found. I connected the ecu to a battery, is there a minimum voltage for reading the ecu?, I can here the fuel pump relais and the ses light comes on when i connect to the battery!"
    Dave already showed the link on two threads with moates and here in the forum.
    What would be a good memcal for this car and this engine.Does somebody else already change the carburator of a 304 to TBI.
    Moates says i will have problems because the memcal (ecu) is from a 6cyl engine while the 304 is a 8 cyl.Can I switch off the VSS in the BJBB.bin
    A lot of questions --in this post.

  2. #2
    Super Moderator dave w's Avatar
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    The 16196395 usually requires a VSS. The 16196395 can use a 2000 Pulses Per Mile VSS.

    Some VSS is options: https://www.ebay.com/itm/85-89-TPI-R...5.c10#viTabs_0 and https://jagsthatrun.com/collections/...s/speed-sensor

    The VSS Can Not be disabled in the .bin file.

    Maybe there is way disable the VSS with some wiring harness modifications?

    dave w

  3. #3
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    This link may be helpful.
    http://www.bigscaryjeep.com/TBI_Page.html

    And you should try to find a V8 memcal.

  4. #4
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    Thank you for the hint, but I think the 306 is much different to the 304.For the memcal, i have already found some bins here in the forum for the 16196395. My actual problem is that the electronic part of the chevy distributor does not work together with the reluctor and hall sensor of the amc distributor. I have to order a distributor from a chevy taho, blazer or caprice with the 8cyl engines. The 4,3l is a 6 cyl. My second problem is still the connection to the ecu. I have a fdti usb cable and a CP2102 (silicon vally) usb ttl cable. Both do not get connection from ehack (winaldl, freescan) to the ecu.All the other parts are already in the car. I had to build two adaptor blades for the TBI to the engine. A thicker one as connection between block and TBI and a thin one between both. Because a channel on bottom of the tbi was right over the mounting screw of the thick blade :-)

  5. #5
    Super Moderator dave w's Avatar
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    There are several options available for a distributor, and several options for connecting to the 16196395 computer.

    The GM 8 pin HEI is a good option for the AMC 304 TBI. http://performancedistributors.com/w...44-300x300.jpg

    This article shows how to convert an AMC distributor to a GM 4 Pin ignition module, but the 8 pin module can be used instead of the 4 pin. https://www.hotrod.com/articles/conv...ion-to-gm-hei/


    The GM remote coil is a good option for the AMC TBI. http://www.gearhead-efi.com/gm-ecm-p...s/coil-efi.jpg


    The ALDL Cable from ALDL.com is a good option to connect with the 16196395 computer using TunerPro RT software. http://aldlcable.com/products/aldlobd1u.asp and http://www.tunerpro.net/downloadApp.htm

    dave w
    Last edited by dave w; 5 Days Ago at 05:28 PM.

  6. #6
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    This article shows how to convert an AMC distributor to a GM 4 Pin ignition module, but the 8 pin module can be used instead of the 4 pin. https://www.hotrod.com/articles/conv...ion-to-gm-hei/

    dave w[/QUOTE]

    Hi Dave w thats exactly what I tried with the 8 pin module, but didn't work. I think the impulse from the reluctor and sensor is too weak or i have changed cables from module to distributor, i will try again!

  7. #7
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    I thought it will not start becauseof the distributor conversion but now I think the fault is within my connections. This ecu is out of an astra with automatic gear. But I have a three speed manual gear, so there is no connection to the gearbox ecu. Which of the 10 gearbox connections do i have to connect , give 12v or earth to have the park nutrual switch simulated?
    Attached Images Attached Images

  8. #8
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    Distributor conversion works now- i had notconnected the ground of the electronic.
    Next question: what will happen when i connect B10 (cruise control) to ground or plus? Will it work as a park nutrual switch?

    "Which of the 10 gearbox connections do i have to connect" - i saw on an other wiring diagramm these connections are for some solenoids insite the AT so I will forget them!

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    Next question: what will happen when i connect B10 (cruise control) to ground or plus? Will it work as a park nutrual switch?
    I do not believe I've seen confirmation. On manual transmission applications it is not connected. The same could be done for an automatic.

  10. #10
    Super Moderator dave w's Avatar
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    The older 1227747 TBI computer has a Park / Neutral wire.

    The 16196395 TBI computer does not have Park / Neutral wire.

    The option of using a VSS along with programming for Manual Transmission is a Very Good Option.

    dave w

  11. #11
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    Quote Originally Posted by dave w View Post

    The option of using a VSS along with programming for Manual Transmission is a Very Good Option.

    dave w
    I wanted to do that with means of eehack, but I can not get connection to the ecu. So I have to buy a programmer first.
    Next question: fuel pump should be able for 3bar but how much is the regulated pressure in the system. I have only about 1 bar!

  12. #12
    Super Moderator dave w's Avatar
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    eehack is for the LT1 engine. eehack is Not for a TBI engine. The correct TBI fuel pressure is 1 Bar.

    Good post for TBI information: http://www.gearhead-efi.com/Fuel-Inj...Information-0D The post is for computer 16197427, the 16196395 computer is very similar.

    The 16196395 computer uses an EPROM Chip. Yes you are correct, an EPROM Chip programmer is required to reprogram a 16196395 Chip.

    EPROM Chips require a Ultra Violet (UV) Light to be erased before the EPROM Chip can be reprogrammed.

    dave w
    Last edited by dave w; 8 Hours Ago at 06:24 AM.

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