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Thread: Fuel Source (OL) FMEM

  1. #1

    Fuel Source (OL) FMEM

    What would cause this? The 02s are off since it's in open loop. They aren't commanded off. The car was bought used and the customer installed a JLT intake, he also has headers. So has anynody run into this issue before? What should I be looking for? Here's the tune and last log



    3.hpt

    19-08-05 13-51-02.hpl
    RAW Racing in Tampa, Fla.
    Providing custom LS tuning and performance upgrades.

  2. #2
    Advanced Tuner
    Join Date
    Mar 2010
    Location
    New Orleans, LA
    Posts
    630
    failed management is usually due to a hego fault

    most o2 faults on coyotes are due to extension cables

    if it has them take them off, if the connector doesnt reach you willneed new o2s for an f150 which have longer wires

  3. #3
    Quote Originally Posted by decipha View Post
    failed management is usually due to a hego fault

    most o2 faults on coyotes are due to extension cables

    if it has them take them off, if the connector doesnt reach you willneed new o2s for an f150 which have longer wires
    Thanks. I?ll check if he has extensions

  4. #4
    Advanced Tuner
    Join Date
    Aug 2006
    Location
    Arizona
    Posts
    244
    Also, if your fuel trims are excessively rich, FMEM will occur.
    2009.5 PBM G8 GXP M6 W/Roof-Self tune, OBX LTs, Kooks axleback, LSA blower, cam,
    Monster LT1-SC clutch, flex fuel, 12 psi [email protected] 1,800 D.A
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    1991 GMC Syclone- Self tune/catback 12.8@104, 4,200ft D.A