charlton Posted March 14, 2019 Share Posted March 14, 2019 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? Quote Link to comment Share on other sites More sharing options...
shaz2010 Posted March 14, 2019 Share Posted March 14, 2019 (edited) 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 Edited March 14, 2019 by shaz2010 (see edit history) Quote Link to comment Share on other sites More sharing options...
shaz2010 Posted March 14, 2019 Share Posted March 14, 2019 http://www.mkivsupra.net/vbb/showthread.php?35920-How-To-Check-the-diagnostics-codes&highlight=Error+code+paper+clip Quote Link to comment Share on other sites More sharing options...
charlton Posted March 14, 2019 Author Share Posted March 14, 2019 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 Quote Link to comment Share on other sites More sharing options...
shaz2010 Posted March 14, 2019 Share Posted March 14, 2019 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. Quote Link to comment Share on other sites More sharing options...
jcbt Posted March 14, 2019 Share Posted March 14, 2019 If you are running a stock Ecu try disconnecting the battery again which resets the ecu Quote Link to comment Share on other sites More sharing options...
AC93 Posted March 15, 2019 Share Posted March 15, 2019 Slim chance, but maybe aged fuel? When was the last time it had fresh high octane goodness? Quote Link to comment Share on other sites More sharing options...
firin Supra Posted March 15, 2019 Share Posted March 15, 2019 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. Quote Link to comment Share on other sites More sharing options...
adam1983 Posted March 15, 2019 Share Posted March 15, 2019 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. Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted March 15, 2019 Share Posted March 15, 2019 Reset the ecu either disconnect battery or pull fuse, fresh fuel 40min drive up motorway or good b roads should sort it. Quote Link to comment Share on other sites More sharing options...
charlton Posted April 13, 2019 Author Share Posted April 13, 2019 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 I’ve missed that! 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. Quote Link to comment Share on other sites More sharing options...
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