terratology Posted January 8, 2010 Share Posted January 8, 2010 Hi, can someone tell me what the resistance's should be on the ign coil as think mine has died due to the cold weather. Sparkplugs getting wet and not starting on lpg or petrol. its a 89 vogue 3.5 efi. cheers all Quote Link to comment Share on other sites More sharing options...
SteveRK Posted January 8, 2010 Share Posted January 8, 2010 I don't know what the resistance should be but would guess its in the order of less than 100 Ohms (with low tension connections disconnected) If you see significantly higher then it is likely failed - if the the engine has been starting o.k until these cold temperatures I would be looking at a 'weak' ignition system so check earths, leads & in particular that you are getting battery voltage to the coil as the battery voltage will fall noticeably in colder temperatures exacerbating a weak voltage problem I think you should be looking at battery voltage on both - & + connections to the coil with everything connected and ignition on. Forget about coolant temp sensor as too much fuel in this weather is probably only just enough for getting the engine to at least cough & splutter! I can disconnect mine and it doesn't stop it running at all Quote Link to comment Share on other sites More sharing options...
terratology Posted January 8, 2010 Author Share Posted January 8, 2010 Cheers for the reply, it was running fine till i went to start it today. Battery is now on charge so will try everything tomorrow. Quote Link to comment Share on other sites More sharing options...
steve_d Posted January 9, 2010 Share Posted January 9, 2010 My vote goes for the ignition amp. Think the tech archive has a test sequence giving expected voltages and resistance throughout the system. Steve Quote Link to comment Share on other sites More sharing options...
paintman Posted January 10, 2010 Share Posted January 10, 2010 Checked for condensation inside the dizzy cap? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted January 11, 2010 Share Posted January 11, 2010 Roughly 1.5 Ohms, although it can be from ~0.5 to ~4, depending on coil, multimeter, etc. as things don't always measure accurately at low resistances. Quote Link to comment Share on other sites More sharing options...
terratology Posted January 12, 2010 Author Share Posted January 12, 2010 Dont woory, its all fixed. A slightly under voltage battery was the problem. Enough to spin it in warmer weather but not when it started to freeze. Rangys runnning better than ever now though as it made me clean and gap the plugs, clean rotor arm and dissy!!!!!!! Quote Link to comment Share on other sites More sharing options...
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