cloudder Posted October 5, 2012 Share Posted October 5, 2012 Hi Guys, On the way to work this morning, car nicely warmed up cruising nice. then suddenly without warning the engine cuts out... still coasting, after a couple of seconds the engine fires up on its own and is sweet.... 10 seconds later the same thing happens... engine cuts.... dead this time. Managed to coast off the road. Turn the ignition off. Go to start again, fires up instantly for about 2 seconds then stumbles for a second or 2 then dead. Checked the operation of the immobiliser and seems good. Tried a good dozens times during the morning but the same thing. If I keep kicking down on the throttle the engine will keep running very iratically, but not enough power to run in gear. I am guessing fuel? Any ideas? Quote Link to comment Share on other sites More sharing options...
ronttuk Posted October 5, 2012 Share Posted October 5, 2012 I would be checking fuel pump or fuel filter Quote Link to comment Share on other sites More sharing options...
cloudder Posted October 5, 2012 Author Share Posted October 5, 2012 One thing, I did fill up at Tescos about 10 miles back, I did run the tank quite low, but no lower than normal. Quote Link to comment Share on other sites More sharing options...
listy Posted October 5, 2012 Share Posted October 5, 2012 If it continuously gets run really low, your fuel filter or pump or both might be clogged up with gunk from the tank. Quote Link to comment Share on other sites More sharing options...
Konrad Posted October 5, 2012 Share Posted October 5, 2012 If it continuously gets run really low, your fuel filter or pump or both might be clogged up with gunk from the tank. Shouldn't get any gunk really, check fuel filter. Quote Link to comment Share on other sites More sharing options...
cloudder Posted October 5, 2012 Author Share Posted October 5, 2012 Thanks Guys, I imagine the only way to check the filter is to whip it off, then reverse flush it with carb cleaner to see if any gunk comes out? Quote Link to comment Share on other sites More sharing options...
Pig Posted October 5, 2012 Share Posted October 5, 2012 Does it sound like its miss firing? I would suggest always start with the simple things, check nothing has come loose and then swap the plugs for a cheap set. No warning lights? Seems odd that 10 miles after filling up, def not put the wrong fuel in? Check your receipt Quote Link to comment Share on other sites More sharing options...
cloudder Posted October 5, 2012 Author Share Posted October 5, 2012 Oh yea all the warning lights came on! My receipt states unleaded.. I did wonder myself. I will attempt to see if there are any fault codes. Quote Link to comment Share on other sites More sharing options...
keron Posted October 5, 2012 Share Posted October 5, 2012 Sounds like the alternator maybe? Quote Link to comment Share on other sites More sharing options...
cloudder Posted October 16, 2012 Author Share Posted October 16, 2012 Hi, Found some time to look at the Supra today. Jumped in the car and it started straight away and ran again for 2 to 3 seconds then dies. Anyway shorted the diagnostics plug, but it showed no faults, but the engine check light pulsed constantly, along with the overdrive light on the dash! Looked at the diagnostics document on line for the engine and noted that stalling directly after start up could be the 'fuel control circuit' I have checked that there is 12V being fed to the pump contol computer in the boot, and there is a constant 4.5v at the same plug (pins 1 & 3) when cranking. Finally I shorted the diagnostics plug to check to see if the pump ran and I can hear it clearly in the boot. Bad light stopped play, so I forgot to get my wife to start the car as I listened to hear whether the pump stopped when the engine cuts out, or attempts to carry on pumping fuel? The diagnostics char stated it could then be the ECU, but I'm not convinced, as if the ECU had died, surely the engine wouldnt run normally for the first few seconds? Any thoughts where to look next? Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 17, 2012 Share Posted October 17, 2012 Bridge the +B and FP pins again and try to start and run the car. If it works fine, it's probably the fuel pump ECU or at least something in that area. Quote Link to comment Share on other sites More sharing options...
cloudder Posted October 17, 2012 Author Share Posted October 17, 2012 Ian, Thanks for the tip, I'll give it a go. Quote Link to comment Share on other sites More sharing options...
cloudder Posted October 20, 2012 Author Share Posted October 20, 2012 Hi Ian Got my paper clip out today and bridged the 2 pins you said and the car runs a treat!! Do you know what this proves? I image shorting between the pins short circuits the fuel pump controller and main ECU? I suppose what I am asking is by swapping out fuel pump controller for another the answer, or is there still dodgey sensors somewhere? Would I be OK assuming the main ECU is fine as the car seamed to run as normal? Admittedly, I only ran the car in this mode for about a minute to 2 minutes, in case I was screwing something else up? Any ideas? Quote Link to comment Share on other sites More sharing options...
TT Paul Posted October 20, 2012 Share Posted October 20, 2012 try a new ecu, or 12v fuel pump mod Quote Link to comment Share on other sites More sharing options...
cloudder Posted October 20, 2012 Author Share Posted October 20, 2012 Hi Paul, What is the 12v fuel pump mod? Just to check, do you mean Engine ECU or Fuel Pump control unit? Quote Link to comment Share on other sites More sharing options...
cloudder Posted October 22, 2012 Author Share Posted October 22, 2012 Can anyone clarify? Quote Link to comment Share on other sites More sharing options...
cloudder Posted November 10, 2012 Author Share Posted November 10, 2012 Got a new Fuel Pump Controller a fitted it today..... the car runs a treat!! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.