Lude Posted September 5, 2012 Author Share Posted September 5, 2012 If i check for error codes will that help too? Hmm water temp sensor, i have changed the radiator recently. Used my existing/old sensor in the mew rad. Wonder if that disrupted anything.... Quote Link to comment Share on other sites More sharing options...
Stephendjb Posted September 5, 2012 Share Posted September 5, 2012 It's the fuel pump ecu the 9v phase has packed up. They start cold on 12v hot starts it uses the 9v part, mine had exactly the same problem, new ecu off Keron problem solved. Quote Link to comment Share on other sites More sharing options...
Digsy Posted September 6, 2012 Share Posted September 6, 2012 Apparently vapour lock went out with carburettors after I mentioned it to someone, dunno if that's true though. Yes and no. If you Google it you will find a load of articles that say its not a problem with fuel injected engines, but it is still something that has to be designed out. IIRC its something to do with the volume of the fuel rail, and its more of a concern nowadays with returnless fuel systems because there is no way to purge the fuel vapour. Given the other posts, the fact that the car seems to be stock, isn't overheating and has a fuel rail with a return line, I agree that its unlikely to be the cause of this issue, though. Quote Link to comment Share on other sites More sharing options...
Lude Posted September 6, 2012 Author Share Posted September 6, 2012 It's the fuel pump ecu the 9v phase has packed up. They start cold on 12v hot starts it uses the 9v part, mine had exactly the same problem, new ecu off Keron problem solved. is that the fuel pump ECU? or the main actual ECU? your symptoms same as mine yea. anything i can test to verify or bypass to be sure? or shall i just go for it... Quote Link to comment Share on other sites More sharing options...
David P Posted September 6, 2012 Share Posted September 6, 2012 (edited) You said the battery is on it's way out so you're going to need one those anyway, I would first replace that and see if it puts it right before fixing things that are probably not broken. Edited September 6, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
TT Paul Posted September 6, 2012 Share Posted September 6, 2012 agreed try the battery first as this is the power behind starting Quote Link to comment Share on other sites More sharing options...
Lude Posted September 6, 2012 Author Share Posted September 6, 2012 (edited) well i say the battery is on its way, the voltage is fine on it. 14v when running, and high 11 when ignition is on (my turbo timer measures it) it just turns over slow IF the car has been left standing for a few days. other than that it turns over fine. plus if ive done a long drive the battery is full of beans and has no problems turning the engine over, its just the car wont catch. (it could due with replacing this winter though) Edited September 6, 2012 by Lude (see edit history) Quote Link to comment Share on other sites More sharing options...
David P Posted September 6, 2012 Share Posted September 6, 2012 If your too tight to buy a new battery, put your car into a bad start scenario then clip on DECENT jump-leads or a GOOD battery pack to start it. Only then can you cross it off the list. I am always suspicious of coincidental iffyness. Quote Link to comment Share on other sites More sharing options...
Lude Posted September 6, 2012 Author Share Posted September 6, 2012 If your too tight to buy a new battery, put your car into a bad start scenario then clip on DECENT jump-leads or a GOOD battery pack to start it. Only then can you cross it off the list. I am always suspicious of coincidental iffyness. yea i got you mate, its not im too tight, i literally spend £100s on the car, just dont want to waste it thats all i will try the new battery to see if that over rides it. ive also just had a PM, if i try the diagnostics port, connect Fp to B+ that'll give the pump 12v, if it starts then, that points to the fuel pump ECU.. Quote Link to comment Share on other sites More sharing options...
Lude Posted September 8, 2012 Author Share Posted September 8, 2012 (edited) Update: It's the fuel pump ecu the 9v phase has packed up. They start cold on 12v hot starts it uses the 9v part, mine had exactly the same problem, new ecu off Keron problem solved. its NOT this. tried doing this made no difference. the battery is fine and full of life, so not that either, starter motor is spinning fine and dandy. back to the drawing board. it does start, just takes a few gos to catch..... PS i am using the throttle also to assist Edited September 8, 2012 by Lude (see edit history) Quote Link to comment Share on other sites More sharing options...
Lude Posted September 9, 2012 Author Share Posted September 9, 2012 Checked the diagnostics and there are no saved errors Quote Link to comment Share on other sites More sharing options...
Benjy Posted September 9, 2012 Share Posted September 9, 2012 How long is the car running before it won't start again? Quote Link to comment Share on other sites More sharing options...
Lude Posted September 9, 2012 Author Share Posted September 9, 2012 How long is the car running before it won't start again? if i just go for 2 minutes down the road. or after a 10mile trip. basically whenever i drive the car it does it. only time i done have the problem is when its a cold start Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted September 9, 2012 Share Posted September 9, 2012 Have you checked the Coilpacks ?? Quote Link to comment Share on other sites More sharing options...
Lude Posted September 9, 2012 Author Share Posted September 9, 2012 Have you checked the Coilpacks ?? how would i check them? ive experienced that on an old car (200sx) where when warm one of them used to fail which would create a miss fire, On the Supra though, after ive driven the car for half a mile the car isnt warm, yet still does it... Quote Link to comment Share on other sites More sharing options...
Benjy Posted September 9, 2012 Share Posted September 9, 2012 If the coil packs are breaking down it'd have a misfire, surely? Can you borrow any known good components from a running car? Quote Link to comment Share on other sites More sharing options...
Shane Posted September 9, 2012 Share Posted September 9, 2012 What does the spark look like when this problem is present and have you pulled a plug immediately after cranking and not starting to see if they are wet? Do you have a fpr with a gauge? If so is there plenty of fuel pressure? Quote Link to comment Share on other sites More sharing options...
tkddav3 Posted September 9, 2012 Share Posted September 9, 2012 ahh so tis you on driftworks! Quote Link to comment Share on other sites More sharing options...
charleshmlee Posted September 11, 2012 Share Posted September 11, 2012 Any update for your problem lude? Quote Link to comment Share on other sites More sharing options...
Lude Posted September 11, 2012 Author Share Posted September 11, 2012 i havent got a AFR gauge un-fortunatly no, and no i have not pulled a spark plug out to check if its wet or dry. i was going to order a Water Temp sensor from toyota tomorrow, on the weekend i will try that and also check the spark plugs, then report back..... ive posted on driftworks few people say from the video it seems to be flooding..... Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 11, 2012 Share Posted September 11, 2012 Have you done a compression test. Water getting into the chamber could lead to this.... Quote Link to comment Share on other sites More sharing options...
Lude Posted September 11, 2012 Author Share Posted September 11, 2012 Have you done a compression test. Water getting into the chamber could lead to this.... no havent, car doesnt leak/use no water at all though, and i think that would be bit of a worst scenario even if it was that? will look at the plugs and get new water temp sensor..... Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 11, 2012 Share Posted September 11, 2012 Yer it is normally always worse. But a tiny bit of water causing a spark issue could cause a problem. But you'll find that out when looking at the plugs. Just throwing an idea out there for you, but not using water is a good indicator i am wrong :-) Quote Link to comment Share on other sites More sharing options...
David P Posted September 15, 2012 Share Posted September 15, 2012 (edited) If you're sure the battery is O.K. the first sensor I would go for is the crank. Edited September 17, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
Lude Posted September 16, 2012 Author Share Posted September 16, 2012 Isit yea. I purchased the warer temp one this week, will fit it today. Will get the crank one too if problem.still persists. Car was ol yesterday. Will report back didnt have time yesterday to check the spark plugs Quote Link to comment Share on other sites More sharing options...
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