Kaan W Posted November 28, 2012 Share Posted November 28, 2012 (edited) Hi all, Just went to start my car up at the garage and it started then konked out as the negative battery connecter popped off as it wasnt tightened properly so I reconnected it. Now when I tried to start it again it fired for about a second then went off, so i tried again with some gas and it was very hesitant and then konked out again when I stopped the throttle. Any ideas? It was rather cold but dont know if something would have been affected with the lead popping off. Thanks Edit: Also it smelt very rich but dont know whether its because I pumped the throttle a couple of times before I started it the second time. Edited November 28, 2012 by Kaan W (see edit history) Quote Link to comment Share on other sites More sharing options...
Benjy Posted November 28, 2012 Share Posted November 28, 2012 Sounds like you may have flooded it slightly. Bury the throttle and turn it over, it'll try to clear the flood if indeed that's the problem. Quote Link to comment Share on other sites More sharing options...
Kaan W Posted November 28, 2012 Author Share Posted November 28, 2012 Sounds like you may have flooded it slightly. Bury the throttle and turn it over, it'll try to clear the flood if indeed that's the problem. Ok I will try that. Would the battery lead coming off ruin something or blow anything? Quote Link to comment Share on other sites More sharing options...
Nic Posted November 28, 2012 Share Posted November 28, 2012 If the battery terminal has been disconnected the ECU will have been reset, this will cause the car to run a bit lumpy and not idle properly, it'll take a few miles for the ECU to relearn things and run properly again. Quote Link to comment Share on other sites More sharing options...
Kaan W Posted November 28, 2012 Author Share Posted November 28, 2012 If the battery terminal has been disconnected the ECU will have been reset, this will cause the car to run a bit lumpy and no idle properly, it'll take a few miles for the ECU to relearn things and run properly again. Thats what I thought. It is a syvecs ecu tho.... The battery was disconnected before for 3 months and it started first time and ran smooth with no problems but dont know if disconnecting the battery with the car running is different. Quote Link to comment Share on other sites More sharing options...
Kaan W Posted November 28, 2012 Author Share Posted November 28, 2012 Any harm in disconnecting the battery of a running engine? Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted November 28, 2012 Share Posted November 28, 2012 Modern cars dont flood! Thats from the days of carbs and manual chokes. If it turns over and catches, try and hold the revs on the throttle until it stabilises. Im not familiar with the syvecs, can you see any indication or warning lights? Quote Link to comment Share on other sites More sharing options...
Kaan W Posted November 28, 2012 Author Share Posted November 28, 2012 Modern cars dont flood! Thats from the days of carbs and manual chokes. If it turns over and catches, try and hold the revs on the throttle until it stabilises. Im not familiar with the syvecs, can you see any indication or warning lights? Oh ok, I did catch the revs for a few seconds but as soon as I let off it died. I have the handbrake warning and the big red sqaure warning light on but this has been on since the other week when I put my car back together, which it was running perfectly fine then. I will have another try tomorrow as it might have been the cold weather but I doubt it. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted November 28, 2012 Share Posted November 28, 2012 Take the battery off overnight to reset everything, then try again tomorrow. Its very possible the idle control valve wasnt 'parked' properly, to quote Chris Wilson. But like I said if it catches hold it on the throttle until it stabilises. Quote Link to comment Share on other sites More sharing options...
Kaan W Posted November 28, 2012 Author Share Posted November 28, 2012 Take the battery off overnight to reset everything, then try again tomorrow. Its very possible the idle control valve wasnt 'parked' properly, to quote Chris Wilson. But like I said if it catches hold it on the throttle until it stabilises. Cheers bud will do just that. Im just hoping that disconnecting the battery with the car running hasnt blown something or messed something up. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted November 28, 2012 Share Posted November 28, 2012 It shoudnt do, the alternator will be providing power anyway. Quote Link to comment Share on other sites More sharing options...
Kaan W Posted November 28, 2012 Author Share Posted November 28, 2012 It shoudnt do, the alternator will be providing power anyway. Oh yeah so it will. But wouldnt it be running not earthed as it was the earth lead that popped off? Quote Link to comment Share on other sites More sharing options...
Benjy Posted November 29, 2012 Share Posted November 29, 2012 Modern cars dont flood! Thats from the days of carbs and manual chokes. If it turns over and catches, try and hold the revs on the throttle until it stabilises. Im not familiar with the syvecs, can you see any indication or warning lights? If it injects fuel, but cuts out before the fuel's had a chance to burn off, it'll flood. I went to an Astra the other day, AA had diagnosed a snapped belt. I turned the key with my foot flat on the floor, it stopped injecting fuel temporarily to allow the oil to build up again on the cylinder wall to create compression and start. Which it did. I then went to a Polo that I'd diagnosed as having a faulty ECT sensor previously. Did the same thing, it allowed the fuel that had saturated the plugs to burn off so that when atomised fuel was injected it could ignite it, and it started. So they do flood. And the stench of fuel at the back of the car when it started was unreal. But hey, I only own a garage, what do I know!? Quote Link to comment Share on other sites More sharing options...
Kaan W Posted November 29, 2012 Author Share Posted November 29, 2012 Well to update I started the car this morning and all seems fine again. Must have been the freezing weather last night. Quote Link to comment Share on other sites More sharing options...
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