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Thread: Supra SOS: Flat battery and now running lumpy

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  1. #1
    Not quick enough Club Member charlton's Avatar
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    Supra SOS: Flat battery and now running lumpy

    My Supra was running fine before my battery died after 3-4 weeks of not using it. After recharging the battery it started fine but it is now driving what I would call lumpy (slight vibration through car, exhaust and engine). The power has been massively restricted so maybe in limp mode and seemed like it was close to stalling (auto). I assume this is not running on all cylinders, distributor cap maybe? Spark plugs should be fine and changed within the last few thousand miles, max

    Is there anything that a technically minded, non mechanic, equipment lacking hopeful can/should check on his drive before I get it recovered to the nearest garage?
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  2. #2
    What search button? Club Member shaz2010's Avatar
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    Hi mate have you done a code check by using the paper clip trick ? That may be your best bet first. Probs a code 42
    Last edited by shaz2010; 14-03-19 at 21:42.
    2011 BLACK N/A Auto SOLD :-/
    2012 LOOKING FOR TT...
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  3. #3
    What search button? Club Member shaz2010's Avatar
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    2011 BLACK N/A Auto SOLD :-/
    2012 LOOKING FOR TT...
    07/2012 Supra UK Spec auto TT Stock...
    http://www.mkivsupra.net/vbb/showthr...67-Big-Clean-D
    http://www.mkivsupra.net/vbb/showthr...ew-Uk-Supra-TT

  4. #4
    Not quick enough Club Member charlton's Avatar
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    Hadn’t considered that as I didn’t have any warning lights, just watched a clip on YouTube and will pinch a paper clip from work and give it a go tomorrow, thanks
    Contribute to my turbo manual fund - PM me for details
    1994 | GZ BPU Aerotop | 02/13
    1995 | Veilside widearch SZ-R | 03/06 - 10/14

  5. #5
    What search button? Club Member shaz2010's Avatar
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    Quote Originally Posted by charlton View Post
    Hadn’t considered that as I didn’t have any warning lights, just watched a clip on YouTube and will pinch a paper clip from work and give it a go tomorrow, thanks
    no probs mate, you don’t always get a warning light when a fault comes about. Just an easy and cheap way in ruling it out.
    2011 BLACK N/A Auto SOLD :-/
    2012 LOOKING FOR TT...
    07/2012 Supra UK Spec auto TT Stock...
    http://www.mkivsupra.net/vbb/showthr...67-Big-Clean-D
    http://www.mkivsupra.net/vbb/showthr...ew-Uk-Supra-TT

  6. #6
    Chris Bailey's minder Club Member jcbt's Avatar
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    If you are running a stock Ecu try disconnecting the battery again which resets the ecu
    SRD 850S - 93 J-Spec Precision 6466 Gen 2 single - Built by SRD
    850 HP and 641 ft/lb torque and yes it's an auto

  7. #7
    Work... what work? Club Member firin Supra's Avatar
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    Quote Originally Posted by jcbt View Post
    If you are running a stock Ecu try disconnecting the battery again which resets the ecu
    Sounds like the ecu has reset itself and now needs to learn its parameters.
    Disconnect again and then reconnect after 10 mins and then go for a drive for around 30 mins. After that time everything should go back to normal. Be aware though that if u are in start stop traffic the car might want to cut out so best find a road where u can drive constantly without stopping.
    ]Uk toyota supra tt auto bpu 396 hub hp
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  8. #8
    Not quick enough Club Member charlton's Avatar
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    Thank you all for the replies, I got a bit lazy and only just got round to putting some effort in!

    New battery in and below was the fix. Fired up the same lumpy way, pulled out the road and it felt like it had a bit more give in it this time. Put my foot down, loud bang, stutter, then release! Just went on a 15/20 minute trouble free drive, how Iíve missed that!

    Quote Originally Posted by firin Supra View Post
    Sounds like the ecu has reset itself and now needs to learn its parameters.
    Disconnect again and then reconnect after 10 mins and then go for a drive for around 30 mins. After that time everything should go back to normal. Be aware though that if u are in start stop traffic the car might want to cut out so best find a road where u can drive constantly without stopping.
    Contribute to my turbo manual fund - PM me for details
    1994 | GZ BPU Aerotop | 02/13
    1995 | Veilside widearch SZ-R | 03/06 - 10/14

  9. #9
    I'm addicted now! Club Member
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    Slim chance, but maybe aged fuel? When was the last time it had fresh high octane goodness?
    1994 Stock TT Supra & N/A 5 soon to be NA-T 6 speed

  10. #10
    I'm addicted now! Club Member adam1983's Avatar
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    What model do you have?

    This happened on my vvti a couple of months back after being sat for a few months. Changed the oil control valve and it fixed the issue.


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  11. #11
    What search button? Club Member nigelboyne's Avatar
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    Reset the ecu either disconnect battery or pull fuse, fresh fuel 40min drive up motorway or good b roads should sort it.
    Sean

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