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Thread: Coil per cylinder 4.3?

  1. #46
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    DHPs have been tough to find for a while now... I would be playing with OBD2 V6 stuff now if I could get ahold of one when I don't immediately go broke seconds before one gets posted for sale with a reasonable price. being able to use just the somewhat more attainable AVT cables(and not having to screw around with a serial-USB adapter) is helpful, but I have yet to see anyone post definitive proof of being able to just plug in and go.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  2. #47
    Fuel Injected! JeepsAndGuns's Avatar
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    Quote Originally Posted by ericjon262 View Post
    what are you trying to run, a 4.0?
    Yes. Basicly my dream fuel injection setup would be coil per cylinder sequential injection for my 4.0. I plan on building it and stroking it in the future (possiably even turbo), and being able to tune it and ditch the distributor would be awesome.
    My current plan was to swap in a 7727 since the stock 93 jeep ecm is not tuneable. Only thing is, I lose sequential injection, since the 7727 is batch fire. But I can use a ICM/coil pack from a fwd gm car and get waste spark DIS ignition (just have to make/mount a correct crank trigger wheel)
    Now that the 411 flash tool is out, it opens up the 411. I could base the system off a 4.3 tune/pinout and it would basicly be back like my stock jeep system (sequential injection with a distributor) but now be tuneable. Just make/mount the required crank trigger wheel. However, knowing the 411 can run coil per cylinder on the V8's, but not the V6's is very disappointing, especially knowing how popular 6 cylinders are today. I will still however most likely drop the plan of using the 7727 in favor of the 411 simply because of being able to keep it sequential and the possiablity of being able to re use many jeep sensors (tps, iac, map, and possiably cam position sensor) and being a newer faster and well supported ecm.


    And what is a DHP?
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  3. #48
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    sequential injection is overrated IMO.... I've run an engine with both its original PCM(that was SFI) and a 16149396(7727 with extra RAM) and noticed no difference in how well either operated.

    if I had to choose between single coil/dizzy + SFI + a non-tunable PCM or batch + waste-spark + super-well hacked PCM, I'm going that second route every time.

    the 0411.... I'm sure it can be used with 1 coil/cylinder ignitions, but I'm certainly not the one to be able to figure it out.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  4. #49
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    DHP= Digital horsepower tuner.

    does the 4.0 use a cam sensor? any GM obd2 setup capable of coil per cylinder will use a cam signal.

  5. #50
    Fuel Injected! JeepsAndGuns's Avatar
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    Yes. All 91 and newer 4.0's have sequential injection with both a cam and crank sensors. The cam sensor is a hall effect 1x signal mounted inside the distributor just like the obd2 4.3's chevys. The crank sensor is also hall effect and reads off notches in the flywheel. The number of notaches (3 sets of 4 notches) are not compatable with any gm system I know of, but mounting a new wheel and sensor on the front puley looks pretty easy.
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  6. #51
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    playing the really long game here... turns out the engine I am going to be using has the same crank trigger wheel as an LS1, the cam wheel is different though, the cam wheel on my engine is a 1x missing tooth, the cam wheel on an LS1 is a 1x 180 degree reluctor.

    IOW, it may be possible to run a GM LX9 with an 0411, which is way more hacked than anything GM V6.

    I'll follow this up with anything else I can find.

  7. #52
    Super Moderator dave w's Avatar
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    The 2013 Chevy Silverado 1500 with 4.3 is a coil pack / coil per plug ignition system. Uses AC Delco part number D599A coil pack.

    The LS1 1x cam reluctor is 175 degrees.

    dave w

  8. #53
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    Quote Originally Posted by dave w View Post
    The 2013 Chevy Silverado 1500 with 4.3 is a coil pack / coil per plug ignition system. Uses AC Delco part number D599A coil pack.

    The LS1 1x cam reluctor is 175 degrees.

    dave w
    yep, but also starts getting into DBW and DI, and uses a 60-2 trigger instead of a 24x wheel like I need.

    Thanks for the correction on the cam wheel, I was just guessing based on the look of it.

  9. #54
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    Blast from the past.

    Why not go to DIS on the 4.3? Why coil near plug?

  10. #55
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    yeah, sure is, but the new info is still relevant to the original discussion. I was more looking to develop a way to run coil near plug on a 60V6, and thought a mix of V6 and V6 0411 configurations might work. now I see I may be able to just run a Lx9 with an 0411 without nearly as much work as I thought, although now, I'm running a MS3x, so it's kinda an irrelevant for me.

    why no DIS?

    I didn't like the ICM's and long plug wires for some reason when I built (rebuilt) the car, so I went with coil near plug.

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