chico Posted March 5, 2009 Share Posted March 5, 2009 Hi Chaps, having some problems with my 2jz-gte! its a -97, with 66.000kms. the soop was born SZ-R but it had a na-tt vvti conversion. the problem is that it just starts up and runs fine for 3-4sec and then just dies! no imobiliser! any suggestions of what the problem could be?? //Chico Link to comment Share on other sites More sharing options...
Guest supraboi Posted March 5, 2009 Share Posted March 5, 2009 have you checked oil petrol etc it will probably be something stupid like that or a lose wire somewhere just a thought. it could also be the fuel pump is not working properly and engine is not getting enough fuel to air mixture aswell and is just smothering itself and cutting out Link to comment Share on other sites More sharing options...
RobSheffield Posted March 5, 2009 Share Posted March 5, 2009 Who fitted it? What loom does it use? VVTi ECU i guess? Link to comment Share on other sites More sharing options...
chico Posted March 5, 2009 Author Share Posted March 5, 2009 have you checked oil petrol etc it will probably be something stupid like that or a lose wire somewhere just a thought. it could also be the fuel pump is not working properly and engine is not getting enough fuel to air mixture aswell and is just smothering itself and cutting out yep, checked oil, fuel, fuelpump is working, even changed to a fuelpump from a tt! and another problem is that it runs when im using startergas! but as soon as i elimitate the startergas it dies... (sorry for my bad english) Link to comment Share on other sites More sharing options...
chico Posted March 5, 2009 Author Share Posted March 5, 2009 Who fitted it? What loom does it use? VVTi ECU i guess? QSD Performance and Co did 95% of the fitting. but my mate is doing rest of it... its still in his garage! i think it has a VVTI ECU!! Link to comment Share on other sites More sharing options...
Jezz Posted March 5, 2009 Share Posted March 5, 2009 Yep, VVTi loom and ecu. I'm pretty sure its going to be a fuel pressure issue Chico. Specially i'f its ok on start gas. You checked the pumps not cutting out for some reason? Plus, the fuel was well stale in that car. Have you put fresh in? Link to comment Share on other sites More sharing options...
chico Posted March 5, 2009 Author Share Posted March 5, 2009 Yep, VVTi loom and ecu. I'm pretty sure its going to be a fuel pressure issue Chico. Specially i'f its ok on start gas. You checked the pumps not cutting out for some reason? Plus, the fuel was well stale in that car. Have you put fresh in? Hi Jezz, havent changed the fuel in it, i´ll tell my mate to do it tomorrow morning. checked wich pumps?? The soop is lovely, except its not starting... Link to comment Share on other sites More sharing options...
Jezz Posted March 5, 2009 Share Posted March 5, 2009 Hi Jezz, havent changed the fuel in it, i´ll tell my mate to do it tomorrow morning. checked wich pumps?? The soop is lovely, except its not starting... Ah that fuel wont help. Its 2 years old! Check the pumps whirring away, lift the space saver out the boot and put your ear to the cover, you should be able to hear it. Link to comment Share on other sites More sharing options...
AlexM Posted March 5, 2009 Share Posted March 5, 2009 This would be the Sexy Gunmetal car that was sitting in the corner at Silverstone garage then? Link to comment Share on other sites More sharing options...
chico Posted March 5, 2009 Author Share Posted March 5, 2009 Ah that fuel wont help. Its 2 years old! Check the pumps whirring away, lift the space saver out the boot and put your ear to the cover, you should be able to hear it. That was the first thing he did... Link to comment Share on other sites More sharing options...
Jezz Posted March 5, 2009 Share Posted March 5, 2009 That was the first thing he did... Ok, change the fuel. Must be well stale by now. Link to comment Share on other sites More sharing options...
chico Posted March 5, 2009 Author Share Posted March 5, 2009 This would be the Sexy Gunmetal car that was sitting in the corner at Silverstone garage then? YEP Link to comment Share on other sites More sharing options...
chico Posted March 5, 2009 Author Share Posted March 5, 2009 Ok, change the fuel. Must be well stale by now. he pumped in 10L of fresh fuel Link to comment Share on other sites More sharing options...
Stevie Boy Posted March 5, 2009 Share Posted March 5, 2009 Mikey on this forum currently experiencing similar probs with his TT Supra. It appears to an issue with Fuel Pump Control Unit only supplying short period of voltage to pump and then stopping. Runs perfectly with FP CU bypassed (might be worth making sure pump keeps running once started). Tho he put a 2nd hand FP CU on the other day, worked for couple of days and now new ones seems to have given up too just seems to prime pump and thats it, could be loss of a signal/feed from Engine CU to FP ECU, so now considering 12v mod as a solution. Link to comment Share on other sites More sharing options...
chico Posted March 5, 2009 Author Share Posted March 5, 2009 Mikey on this forum currently experiencing similar probs with his TT Supra. It appears to an issue with Fuel Pump Control Unit only supplying short period of voltage to pump and then stopping. Runs perfectly with FP CU bypassed (might be worth making sure pump keeps running once started). Tho he put a 2nd hand FP CU on the other day, worked for couple of days and now new ones seems to have given up too just seems to prime pump and thats it, could be loss of a signal/feed from Engine CU to FP ECU, so now considering 12v mod as a solution. Thanx for taking time. how do i do this 12v mod?? Link to comment Share on other sites More sharing options...
Jezz Posted March 5, 2009 Share Posted March 5, 2009 Thanx for taking time. how do i do this 12v mod?? Do a search for fuel pump 12v mod. IIRC its just a simple joining of two wires. Link to comment Share on other sites More sharing options...
chico Posted March 5, 2009 Author Share Posted March 5, 2009 Do a search for fuel pump 12v mod. IIRC its just a simple joining of two wires. ok, but is it safe to do it?? will it run as it should then?? or will i end up changing something else?? Link to comment Share on other sites More sharing options...
Stevie Boy Posted March 5, 2009 Share Posted March 5, 2009 Thanx for taking time. how do i do this 12v mod?? Well i'm NOT recommending you do this as a solution to your problems due to numerous reports of it being a bad thing and potentially dangerous for various reasons. On Mikeys Supe, purely just to see if the car would run for more than just a couple of secs, bypassed the fuel pump control unit (have heard of numerous methods of doing it), but on his car just disconnected the FP CU located in the passenger side rear inner wing behind trim panels and on the plug-end bridged out main ignition switched live onto the pump feed wire. Can't remember what colour wires as was a few weeks back, but used a multimeter to check which wire fed the fuel pump and which supplied the FP CU with 12v (batt voltage) which IIRC was an Ignition swtched live. As soon as ignition was turned on fuel pump will be heard running and stay running, so car started straight away to check all was running well, just kept on running no problem, shame new FP CU didn't sort it out for more than a couple days so. Link to comment Share on other sites More sharing options...
chico Posted March 6, 2009 Author Share Posted March 6, 2009 Well i'm NOT recommending you do this as a solution to your problems due to numerous reports of it being a bad thing and potentially dangerous for various reasons. On Mikeys Supe, purely just to see if the car would run for more than just a couple of secs, bypassed the fuel pump control unit (have heard of numerous methods of doing it), but on his car just disconnected the FP CU located in the passenger side rear inner wing behind trim panels and on the plug-end bridged out main ignition switched live onto the pump feed wire. Can't remember what colour wires as was a few weeks back, but used a multimeter to check which wire fed the fuel pump and which supplied the FP CU with 12v (batt voltage) which IIRC was an Ignition swtched live. As soon as ignition was turned on fuel pump will be heard running and stay running, so car started straight away to check all was running well, just kept on running no problem, shame new FP CU didn't sort it out for more than a couple days so. thanx, so what is the best to do, to get it properly done?? Link to comment Share on other sites More sharing options...
Stevie Boy Posted March 6, 2009 Share Posted March 6, 2009 I'd suggest you do a search on the mod for the safest/best method, i assume at present you are only trying to elminate things to get to cause of the problem and then proceed the potential solution, ie such as a new FP CU. Link to comment Share on other sites More sharing options...
chico Posted March 6, 2009 Author Share Posted March 6, 2009 I'd suggest you do a search on the mod for the safest/best method, i assume at present you are only trying to elminate things to get to cause of the problem and then proceed the potential solution, ie such as a new FP CU. look i´ll be buying a new FP CU tomorrow then... Link to comment Share on other sites More sharing options...
Stevie Boy Posted March 6, 2009 Share Posted March 6, 2009 look i´ll be buying a new FP CU tomorrow then... Not if you find the car still dies after 3 secs, when you've tried the mod you won't. Link to comment Share on other sites More sharing options...
chico Posted March 6, 2009 Author Share Posted March 6, 2009 Not if you find the car still dies after 3 secs, when you've tried the mod you won't. ok, so you mean that i should try the 12v mod first?? and if it sorts the problem i should buy a new FP CU??? Link to comment Share on other sites More sharing options...
Stevie Boy Posted March 6, 2009 Share Posted March 6, 2009 ok, so you mean that i should try the 12v mod first?? and if it sorts the problem i should buy a new FP CU??? Well it's worth a go i guess, but if it then runs fine with a 12v mod it only means your getting closer to the cause of your problem, as in Mikeys case either he's incredibly unlucky for his next FP CU to have gone down after only a couple of days or there's some other problem with the car linked to killing off his two FP CU. I'll let you know if i get a chance to have a look at his Supe at some point over the weekend and find out anything. Link to comment Share on other sites More sharing options...
chico Posted March 6, 2009 Author Share Posted March 6, 2009 Well it's worth a go i guess, but if it then runs fine with a 12v mod it only means your getting closer to the cause of your problem, as in Mikeys case either he's incredibly unlucky for his next FP CU to have gone down after only a couple of days or there's some other problem with the car linked to killing off his two FP CU. I'll let you know if i get a chance to have a look at his Supe at some point over the weekend and find out anything. ok i see... appreciate if u did and got back to me! Cheers Link to comment Share on other sites More sharing options...
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