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Thread: Engine dies when shifted into gear (automatic).

  1. #1

    Default Engine dies when shifted into gear (automatic).

    Been running great since install. Without timing control. Decided it was time to try it. Duraspark distributor, Sniper coil driver. Locked out, referenced & set. Everything matches. Starts right up, seems to run good. Pull into drive or reverse, starts to shake a bit. Sometimes it just dies immediately. Tried lowering my idle AFR. Was 14.2, now 13.8. No difference. Any ideas?

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
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    18,698

    Default

    If the ignition timing is synchronized, you'll probably have to program the VR Magnetic Sensor Type "Minimum Signal Voltage" & "Filtering" parameters.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3

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    I've tried .5 & .65, with no difference. Filtering is set to high.

  4. #4

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    How's the idle ignition timing set? Sounds like the engine could use a bit more timing advance. Also, maybe lean the AFR out a bit?

  5. #5

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    What's the IAC percentage?

  6. #6

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    Tried AFR at 14.2. Leaner than that? Timing is 24° at idle.
    IAC was 8%, when I pulled it into gear (died instantly).
    When running rough in gear, IAC is shifting around trying to maintain.
    Thanks for quick responses!

  7. #7

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    What idle RPM do you have it set at? Also, what kind of cam & converter are you running, and are the Base Timing Table values in gear & out of gear the same at idle?
    Last edited by SatherCS; 08-31-2017 at 09:41 PM.

  8. #8

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    Idle RPM is 750. Cam is RV type. 429 Ford. Converter is 400-500 stall over stock. Timing is same in & out. I'm stumped.

  9. #9
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,698

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    Stalling in gear or at a stop: In the Holley EFI software (LINK), look at where this happens on the Base Fuel & Timing Tables. Determine if it's stalling
    due to a rich or lean condition. Also, the IAC Position is supposed to increase when you shift the transmission into gear (LINK). Sometimes the "neutral"
    area of the Base Fuel Table is fine, but the "in gear" area needs to be tuned. On the Base Fuel Table, the "in gear" idle area is just above the "neutral"
    idle area. Look at where the live cursor moves to, when you shift the transmission into gear. Is this "in gear" idle area, a little more rich (lbs/hr), than
    the "neutral" idle area? You'll have to look at the Learn Table too, since they function as one (LINK). Also, ensure the Target A/F Ratio Table and Base
    Timing Table are flat in these two idle areas.
    https://forums.holley.com/showthread...6586#post86586 (Advanced Table For In-Gear Idle Control)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  10. #10

    Default

    Thanks. Just don't understand what's different. Same timing as it had been, just now the ECU has control of it.

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