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Thread: Stalling When Putting Transmission Into Gear

  1. Default Stalling When Putting Transmission Into Gear

    I have a relatively new Avenger EFI install in the truck in my signature. Lately, the engine wants to stall when I put the transmission in gear before the engine is fully warmed up. Once warm this does not happen.

    The stalling in gear only seems to happen when the coolant/engine is between 100°-120° F. I have two modifiers setup to add RPM and timing based on CTS, but this is not radical. I try to drive my truck out of the parking garage because I'd rather warm it up to temp outside, due to noise & emissions sensitive neighbors in the building. I'll usually like to warm the truck up to about 120°-160° before driving it.

    My AFR settings are approximately:
    14.0 Idle
    13.5 Cruise
    12.5 WOT

    Timing settings are:
    25 Idle (Idle spark control is on)
    32 Cruise
    30 WOT (never seen it above 28 @ WOT)

    I've been experimenting with Idle RPM in the 800-875 range (875 default for my Wizard cam selection), and I shoot for the highest vacuum at idle, then adjust the IAC to reach 2-4° @ hot idle. My idle RPM is currently 845. Thoughts?

    '59 Chevy 1/2 ton Pickup 3" lift (1" body all around, 2" rear suspension) & dual sway bars
    357ci SBC, Vortec heads, 214°/224° @ 0.050 cam/under .050" lift/112° LSA & roller rockers
    2.5" ram horn manifolds, dual 2.25" pipes, H-pipe behind trans, 14" Flowmaster mufflers
    Power steering, tilt column, power disc brakes up front, A/C (Vintage Air kit pending)
    700R4 transmission, 2200 stall, 3.42 limited-slip rear end & 31.5" tires

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
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    Default

    Quote Originally Posted by octanejunkie View Post
    Lately, the engine wants to stall when I put the transmission in gear before the engine is fully warmed up. Once warm this does not happen.
    The stalling in gear only seems to happen when the coolant/engine is between 100°-120° F.
    Determine if it's stalling due to a rich or lean condition. When the Base Fuel Table is well tuned, adjust the Coolant Temperature Enrichment % and A/F Ratio Offset Tables (Fuel ICF) at the troublesome temperature range. Maybe the Target Idle Speed RPM too (Idle ICF).
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. Default

    Quote Originally Posted by Danny Cabral View Post
    Determine if it's stalling due to a rich or lean condition. When the Base Fuel Table is well tuned, adjust the Coolant Temperature Enrichment % and A/F Ratio Offset Tables (Fuel ICF) at the troublesome temperature range. Maybe the Target Idle Speed RPM too (Idle ICF).
    I'm pretty sure it's related to the idle RPM change. I'll check all the base tables around this RPM, adjust & report back.

    Trying to find the best idle quality I can. Driveability is pretty darn good where it is now. Thanks Danny.

    '59 Chevy 1/2 ton Pickup 3" lift (1" body all around, 2" rear suspension) & dual sway bars
    357ci SBC, Vortec heads, 214°/224° @ 0.050 cam/under .050" lift/112° LSA & roller rockers
    2.5" ram horn manifolds, dual 2.25" pipes, H-pipe behind trans, 14" Flowmaster mufflers
    Power steering, tilt column, power disc brakes up front, A/C (Vintage Air kit pending)
    700R4 transmission, 2200 stall, 3.42 limited-slip rear end & 31.5" tires

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