jimmy1985 Posted April 6, 2012 Share Posted April 6, 2012 hey all I'm having an issue that started intermittently and now its happening every time i start it, basically every time I start the car it fires up perfectly, no hesitation whatsoever. However as the water temps get up to about 65-70 and oil temps about 50, it starts to idle very low, and then eventually it cuts out. The car then wont start at all. Now before it dies I can keep the revs up and its no problem, no misfires, no hesitation etc and runs smooth. Its just when it idles and cuts out or if I switch it off, and then try and restart it, it just refuses to start until its cold. Now I immediately thought coolant temp sensor, however as the right hand warning lights were not working (typical dry solder joints) I couldn't pull fault codes. I changed it anyway for a new Toyota item and it didn't fix it. I then proceeded to fix the warning lights and did the diagnostic test and its showing absolutely no faults whatsoever :S no the cars fitted with a afr gauge and its reading as expected, rich when cold and then near stoich when warm, so the standard oxygen sensor is working (if it wasn't then it would be irratic) its obviously something to do with the open loop system, but i'm unsure what to do. Quote Link to comment Share on other sites More sharing options...
chrispot Posted April 6, 2012 Share Posted April 6, 2012 I had a problem like this when i had my mk3 supra turbo, i had put on a fse fuel reg, which would not hold fuel pressuse when the engine was turned off which then lead to a vapour lock (fuel boiling) and when i went to restart on a hot day would run very rough and would stall unless i kept the revs up for a minute or so, i know that the supra has a vsv on the pressure reg to up pressure when hot starting, you could check that, you could remove the vac pipe of the fuel pressure reg when you start from hot to see if that helps, also i would check to see if the fuel system is holding pressure if its not holding pressure it could be the pump or reg. hope this helps regards chris Quote Link to comment Share on other sites More sharing options...
Stephendjb Posted April 10, 2012 Share Posted April 10, 2012 9v stage of the fuel pump may have failed. I've got the same problem. Quote Link to comment Share on other sites More sharing options...
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