MY ROD GOT OUT Member 434 Member For: 14y 7m 29d Posted 05/10/12 09:26 PM Share Posted 05/10/12 09:26 PM Hey everyone, car starts perfectly when cold, but randomly after warmed up sometimes I go to start car and it almost doesn't turn engine over but still starts but only just. I have noticed that when it happens all lights go out, so I'm assuming a bad connection but have tighten all cables etc and had battery tested all seem fine. Must be something to do with heat? Cause it never happened at all during winter. Battery is in boot which I used heavy welders power cable but I did just extend cable from original cable not from starter. Any ideas? Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/ Share on other sites More sharing options...
ScatterBrain Donating Members 316 Member For: 15y 11m 1d Gender: Male Location: Brisbane Posted 05/10/12 09:49 PM Share Posted 05/10/12 09:49 PM Have you checked the earth strap on the right hand side of the engine? Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305459 Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 9m 6d Gender: Male Posted 05/10/12 10:07 PM Share Posted 05/10/12 10:07 PM It will be a heat soaked starter motor, coil windings have increased resistance when subjected to heat over time. Very common 1 Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305461 Share on other sites More sharing options...
MY ROD GOT OUT Member 434 Member For: 14y 7m 29d Posted 06/10/12 02:46 AM Author Share Posted 06/10/12 02:46 AM (edited) So new starter motor? Only done 60,000km does it usually happen that soon?Also it has actually done it at night, is it heat soak caused by the extra resistance not so much weather heat? Edited 06/10/12 02:53 AM by FINNEY Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305535 Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 9m 6d Gender: Male Posted 06/10/12 02:57 AM Share Posted 06/10/12 02:57 AM If it happens after youve been driving for a while then u go to restart and it cranks slow then it will be the starter 99% of the time. Heat from the engine is absorbed by the windings causing high resistance and high current draw Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305537 Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 9m 6d Gender: Male Posted 06/10/12 02:59 AM Share Posted 06/10/12 02:59 AM But seeing as your battery is in the boot make sure your earth cable is in good nic and as short as possible. 60000 is about right Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305538 Share on other sites More sharing options...
MY ROD GOT OUT Member 434 Member For: 14y 7m 29d Posted 06/10/12 07:40 AM Author Share Posted 06/10/12 07:40 AM Earth cable goes straight from battery to boot with same gauge cable as battery, maybe it's not a good enought earth as its only thin metal? Would running another earth off battery to lower chassis help? Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305662 Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 9m 6d Gender: Male Posted 06/10/12 07:43 AM Share Posted 06/10/12 07:43 AM Mines run the same and its fine. Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305663 Share on other sites More sharing options...
MY ROD GOT OUT Member 434 Member For: 14y 7m 29d Posted 06/10/12 07:53 AM Author Share Posted 06/10/12 07:53 AM Alright will keep an eye on it I guess, might take my portable booster with me just in case haha may not help if starter completely kicks it In though. Anyway to confirm that it is the starter with a voltmeter? Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305669 Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 9m 6d Gender: Male Posted 06/10/12 08:03 AM Share Posted 06/10/12 08:03 AM Yep,when it plays up put positive on starter main 12v terminal and negative on engine or chassis and crank it, if it drops below 9.5v or so on cranking and the battery is definitely ok it will be the starter. Link to comment https://www.fordxr6turbo.com/forum/topic/82252-random-slow-crank/#findComment-1305671 Share on other sites More sharing options...
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