Mike25tt Posted March 21, 2012 Share Posted March 21, 2012 My Supra started up fine after finishing work and pulled out of the carpark...2nd gear....3rd gear then total loss of power. It just died on me. I tried to start the car afterwards but nothing. I also tried bumping it off and nothing. I've checked the fuses in the engine bay and the AM2 30amp fuse has blown. I replaced this and tried firing it up and nothing apart from the fuse blowing out again. The engine is trying to turn over, the battery is fine, ignition fuses are fine. Is this a fuel pump issue? as I can't hear it whirr up. Should it make a noise when the ignition is turned? I fitted a Walbro pump back in 2006 and havn't had any problems before. Is the car flooded?.....I'm sure the red "barbeque" looking light flashed up (next to the battery light) when the supe cut out. What is this light?......or has a connection burned out to the fuel pump or pump ecu? I'm currently stranded in Wakefield now and staying at a mates house until I can get this sorted. Please help!!! Quote Link to comment Share on other sites More sharing options...
Iky Posted March 21, 2012 Share Posted March 21, 2012 (edited) You could try taking off the fuel feed hose and see if any squirts out (safely if possible) I'd pop down and give you a hand but unfortunately I'm away from home until next week. Usually if a fuse is blowing, it means there's a short somewhere. you mighty need to re-check your wiring for the walbro to make sure there's not a +ve shorting against the body or anything like that. Edited March 21, 2012 by Iky (see edit history) Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 21, 2012 Author Share Posted March 21, 2012 Ok thanks. I will give it a go tomorrow if I can. I don't have many tools with me which is a pain. Quote Link to comment Share on other sites More sharing options...
Guigsy Posted March 22, 2012 Share Posted March 22, 2012 You should be able to hear the pump if it's a walbro. I blew that fuse in the past. I forget how now. Quote Link to comment Share on other sites More sharing options...
Shane Posted March 22, 2012 Share Posted March 22, 2012 You should be able to hear the pump if it's a walbro. I blew that fuse in the past. I forget how now. It was your VSV connector flapping in the fan blade that had broken up and the spring fingers had welded themselves together. Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 22, 2012 Author Share Posted March 22, 2012 You should be able to hear the pump if it's a walbro. I blew that fuse in the past. I forget how now. Yeh I can't hear the pump, so like Iky said that there's a short somewhere. Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 22, 2012 Author Share Posted March 22, 2012 I've had a little play in the work's car park this morning but couldn't find anything. I will have a look at the fuel pump after work. Failing that, I've got a mechanic coming round do a diagnostics check. Quote Link to comment Share on other sites More sharing options...
Shane Posted March 22, 2012 Share Posted March 22, 2012 I've had a little play in the work's car park this morning but couldn't find anything. I will have a look at the fuel pump after work. Failing that, I've got a mechanic coming round do a diagnostics check. You can isolate the pump therefore eliminating it from the equation at the pump control ecu tucked away in the boot on the passenger side panel. Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 22, 2012 Author Share Posted March 22, 2012 You can isolate the pump therefore eliminating it from the equation at the pump control ecu tucked away in the boot on the passenger side panel. Ok cheers Shane. Yeh I found the pump ecu last night behind the boot light. Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 22, 2012 Share Posted March 22, 2012 I've finally had a chance to look at the electrical stuff, and if AM2 is blowing it won't be your fuel pump, it's not part of that circuit. AM2 goes to the ignition switch and is run off key position 2. The fuel pump won't be spinning up because the ECU isn't seeing an ignition key on event, so it's not activating the pump. AM2 feeds these things: 7.5amp IGN fuse, which in turn goes to the ECU's IGSW input The igniter, the six coil packs, and the noise filter The six injectors (via the resistor pack if you have one) and from there to the ECU. So, check the 7.5amp IGN fuse first. If that's also blown, your short is between that and the ECU. I imagine it's not though. My money is on the igniter pack as it's high amps and on the suspension turret it could be exposed to moisture or some sort of cable damage. There are several diagnostic steps you can take to try and narrow down the fault location, but have a look at what I've mentioned first and if you can't find anything we can go into more detail Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 22, 2012 Author Share Posted March 22, 2012 Thanks very much for your help Ian. That's brilliant. I did out of course, check the ignition fuse last night in my work's carpark and that wasn't blown so your on the mark! The mechanic didn't turn up today as he had contract work on so he's supposed to be calling mid-morning tomorrow to run diagnostic's. The AM2 fuse blows as soon as I turn the ignition one click I think as I tried it this morning. Quote Link to comment Share on other sites More sharing options...
hackin_n_bashin Posted March 22, 2012 Share Posted March 22, 2012 If the cables are all fine, I can post you up a working ignitor pack to try, see if that cures it. Adam Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 22, 2012 Share Posted March 22, 2012 There are plugs you can disconnect to isolate parts of this wiring loom, then simply test continuity to earth. Easy I'll detail them tomorrow if you like. Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 22, 2012 Author Share Posted March 22, 2012 If the cables are all fine, I can post you up a working ignitor pack to try, see if that cures it. Adam Thanks Adam. That would be great. Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 22, 2012 Author Share Posted March 22, 2012 There are plugs you can disconnect to isolate parts of this wiring loom, then simply test continuity to earth. Easy I'll detail them tomorrow if you like. Cheers Ian. That would be really helpful as it would save me time and money! Quote Link to comment Share on other sites More sharing options...
hackin_n_bashin Posted March 22, 2012 Share Posted March 22, 2012 Thanks Adam. That would be great. Pm me your address, me and TheTurtleshead are ripping my TT apart Saturday, so can send it up Monday. Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 23, 2012 Share Posted March 23, 2012 Cheers Ian. That would be really helpful as it would save me time and money! No time to dig into this atm chap, sorry, mental day at work so far. Will see after 5pm Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 24, 2012 Author Share Posted March 24, 2012 That's ok Ian. The Supe went for a ride on a low loader yesterday and now in the garage. I was worried it might get vandalised over the weekend in the works car park. Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 24, 2012 Share Posted March 24, 2012 Suffice to say I'm still working on the same problem at work >_ Quote Link to comment Share on other sites More sharing options...
Mike25tt Posted March 26, 2012 Author Share Posted March 26, 2012 Got the Supra started today. It turned out to be a short in the ignition wiring caused by the turbo timer rubbing over time. Thanks for everyone's help in narrowing it down for me. Mike Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 30, 2012 Share Posted March 30, 2012 Yay Quote Link to comment Share on other sites More sharing options...
Carbon_Bullet Posted February 28, 2016 Share Posted February 28, 2016 That's ok Ian. The Supe went for a ride on a low loader yesterday and now in the garage. I was worried it might get vandalised over the weekend in the works car park. Was this wiring behind the dash? I'm currently in the same boat :/ Have ran out of time and light at the minute Quote Link to comment Share on other sites More sharing options...
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