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alfa5252

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Posts posted by alfa5252

    FG Turbo Randomly Stuck Rich

    in Engine Tuning (AUS)

    Posted

    Yes you're right, they're just changes i have made chasing this issue. Does it with them on or off. 

    Injector data probably looks wrong for 1700cc at 4 bar but its correct and the car runs great. Trims are within 2-3%.

    They are xspurt injectors and data supplied for slopes has not been changed. 

    FG Turbo Randomly Stuck Rich

    in Engine Tuning (AUS)

    Posted · Edited by alfa5252

    Torque source never goes into torque truncation, apart from tip in/tip out and transmission modulation it remains driver demand.

    This barebones file with no custom operating systems still did it. Commands .70-.80 for a while after a half throttle 2-5psi squirt. 

     

     

    • Like 1

    FG Turbo Randomly Stuck Rich

    in Engine Tuning (AUS)

    Posted

    Ok, none of above changed anything. 

    Spoke to Mick Egan his problem was different and did not last any where near as long. 

    Commanded final lambda floats between 0.70 and 0.80. for around a minute before this issue resolves it self and LTFT stays 1.0 and in closed loop fuel source. 

    Could there be something hidden to do with massive pressure difference between Intake Air Pressure sensor and Map sensor? 

    FG Turbo Randomly Stuck Rich

    in Engine Tuning (AUS)

    Posted

    Apprectiate your help Roland,

    Closest i can find is

    auf11247 Max time an A/F excursion can be active to test d.s. EGOS                  20 Secs

    with related scalar auf12263 LAMBSE to command while forcing an A/F excursion to force the d.s. EGO sensors r                        which is 0.85.

     

    auf11249 Time to ramp bank1 rich and bank2 lean during the KOER EGO test.               20 Secs

     

    I've also spent time searching key words on this forum and a couple other ford related forums with no luck.

    FG Turbo Randomly Stuck Rich

    in Engine Tuning (AUS)

    Posted · Edited by alfa5252
    Wrong word

    I orginally thought it was some sort of temperature issue, so disabled all protections cat, exhaust and turbo, and it still does it. Logging the temperatures they are all well below where factory temp protection would come in and even further from where i have moved it too. And to back this up pull after pull on the dyno it never comes up even when the temps increase. 

    This issue only appears after half throttle, couple second pulls.

    If it was going into this temperature protection mode would it not show up in the data logger?

    FG Turbo Randomly Stuck Rich

    in Engine Tuning (AUS)

    Posted

    Hey all,

    A weird issue that is doing my head in. 

    Giving the car a half throttle squirt getting into some boost but not full throttle, then backing off, the air fuel ratio returns to 14.7 after tipout however quickly drifts off to 10.5 and stays there at all loads-idle, accelerating, cruising. This rich afr lasts for around a minute then returns to stoich. 

    Now on the logging during this period I can see injector ms has definitely increased but nothing seems to trigger/change during this rich condition. 

    The fuel pressure remains constant and is not sticking high. Fuel source remains closed loop the whole time. Torque sources remain driver demand.

    Short term/Long term trims are close enough to 1.0 all the time but during this period the short term winds out to 0.70-with no reason why, then a minute later its back to 1.0 and car is no longer rich. Seems to be the only thing in the log changing during this period.

    All vitals/temperatures read as normal. 

    The car misfires during this period as its so rich. 

    Flat out back to back dyno runs or drag strip runs this issue never shows it self. Literally only with squirts of less than full throttle. 

    Any ideas?

     

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