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Thread: need help with tuning something out or modifying it

  1. #1
    Tuner in Training
    Join Date
    Mar 2006
    Posts
    43

    need help with tuning something out or modifying it

    i have a 4200 stall converter in my car, i also noticed my car does not like to be be stalled up for more than a couple seconds or above a certain rpm. it actually gave me a bit of a scare tonight at the track. I usually stall it up around 2500-3500rpm, but I decided to come up on the converter higher than usual (3800-3900rpm). Next thing you know, Im in 2nd gear and i had no 3rd or 4th gear. Scanned the car and it threw a P0502

    i searched the error code P0502 and this is what i came up with-

    Conditions For Running DTC P0502DTC will run under the following conditions:* DTCs P0101, P0102, P0103, P0107, P0108, P0122, P0123and P1810 are not present.* Transmission is not in Park or Neutral.* Throttle angle is greater than 12 percent (3.8L) orgreater than 15 percent (5.7L).* Engine vacuum is 0-31 In. Hg. (0-105 kPa).* Engine speed is greater than 3000 RPM.* Engine torque is 40-400 ft. lbs. (3.8L) or 30-400 ft.lbs. (5.7L).Conditions For Setting DTC P0502DTC will set under the following condition:* Transmission output speed is less than 150 RPM for2.5 seconds.

    Action Taken By Control ModuleControl module performs the following actions if DTC is set:* Illuminates MIL.* Commands 2nd gear only.* Commands maximum line pressure.* Inhibits TCC engagement.

    all of this stuff happened. I wanna know where or if theres a way to raise the time or rpm so i dont have this problem again. If i changed it to "no error reported" for the track, would this prevent it from happening again?
    Last edited by 98tadriver; 09-14-2012 at 09:10 AM.
    2001Corvette A4
    Full bolt ons, tune [email protected] mph 1.43 60'
    Quickest Bolt on C5 Coupe in the Country 10.7's in 2012?

  2. #2
    Tuner in Training
    Join Date
    Mar 2006
    Posts
    43
    Im pretty sure I figured out what to do. I changed the code to "no error reported". stalled it up to 3700 rpm on the street, and it seemed fine. gonna test it out at the track next week and make sure its good
    2001Corvette A4
    Full bolt ons, tune [email protected] mph 1.43 60'
    Quickest Bolt on C5 Coupe in the Country 10.7's in 2012?