Help me with my High EGT temps
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This is a discussion on Help me with my High EGT temps within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have an 02 WRX with 117k on it, and the following mods: Bosal DP with divorced WG Cobb Cat-Back ...

  1. #1
    Registered User
    Join Date
    Apr 2007

    Help me with my High EGT temps

    I have an 02 WRX with 117k on it, and the following mods:

    Bosal DP with divorced WG
    Cobb Cat-Back w/ stock cat
    Unknown aftermarket Uppipe
    K&N replacement filter
    Cobb Accessport running Stage 2 91 octane hitting about 15.5 lbs of boost
    New PCV Valve
    MAF cleaned about 5k ago
    Intercooler is free of oil
    93 octane gas

    Ever since I bought the car with 72k on it, it would occasionally have a problem with high EGT's on a long pull in 3rd and 4th gear or going up a hill on the interstate around 90 mph. BTW I have defi gauges and I haven't climbed under the car to see where the probe is installed. Sorry...

    The problem seems to be getting worse lately(maybe due to the colder weather?) but it seems I cant get a full run out of 3rd or 4th gear without my EGT's shooting up to about 1600F. I have the warning alarm set at 1600F so I always immediately back off and let it drop back down. Cruising at 75mph at 30-40% throttle the temp will hover around 1450F.

    Anyone have any opinions? Am I being stupid some where? I know I need to monitor the A/F with the AP but I need to find someone to ride with me. Do i need any other info to diagnose this?

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  3. #2
    Registered User
    Join Date
    Jan 2008
    IIRC (and someone correct me if im wrong) thats not that high of a value. Long WOT pulls will do that.

    IF your running an unmodified stage 2 91 map, you'll be running so pig rich under WOT that shouldn't have too much to worry about. Especially since your running 93. It should just about be impossible to hurt your motor at 15.5lbs boost, 93 oct, and the super rich A/F ratios that cobbs maps provide.

    just my .02$

  4. #3
    Master Baiter EJ257's Avatar
    Join Date
    Aug 2007
    On a stream bank somewhere
    I Support ClubWRX
    Is the EGT installed properly (exhaust manifold)?

    Monitoring AFR with the AP won't do much. You really need a wideband.

    If I were you, find a local owner who has a tactrix cable and pull some logs.
    2016 Toyota Tacoma TRD Off-Road - Daily
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  6. #4
    Moderator Donkey's Avatar
    Join Date
    Apr 2005
    Da boonies,Va
    I Support ClubWRX
    Probe could also be slightly off but I wouldn't worry about untill you start hitting 1700°F.1500-1600° at WOT is normal.
    Last edited by Donkey; 12-01-2008 at 06:48 AM.
    Resident Adviser @ WTF Tuning, LLC
    2002 FORESTER S
    1998 FORESTER S

  7. #5
    Registered User JUSTINSNUTSWINGER's Avatar
    Join Date
    Jul 2008
    San Antonio
    If your downpipe is wrapped.... might be spiking it up a bit as well. Maybe I am digging too much.

    2000 Escort

    Maintenance schedule and poke in the eyes:

  8. #6
    Registered User EvoEatr's Avatar
    Join Date
    Aug 2008
    Kennett Square, Pennsylvania
    that seems like a pretty much normal temp to me.....
    the EGT should be around 1600F with "spirited" driving and like 1400F at cruise

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