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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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V70 2.4d won't start at all, dash lights on okViews : 1483 Replies : 21Users Viewing This Thread : |
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Jul 15th, 2019, 21:38 | #11 | |
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If the earth strap is dodgy, you could feasibly get the engine running intermittently but because so much engine management is grounded through the earth strap, all manner of strange and/or intermittent behaviour could ensue if the strap isn't 100%. We're just needing more information for now. Removing the battery on a running engine is a very bad idea, whatever fuel it runs on.
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Jul 15th, 2019, 21:49 | #12 |
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Is it possible that an earthing strap to the engine has failed? It might be instructive to connect a jump lead between the engine block and the battery negative terminal and seeing if it makes any difference.
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Jul 15th, 2019, 22:45 | #13 |
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I'll try to grab the neighbour in the morning. Thanks for the advice and info, much appreciated.
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Jul 15th, 2019, 23:51 | #14 |
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after it failed to start did you remember to put it back in park or neutral?!
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Jul 16th, 2019, 00:17 | #15 |
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Yes, definitely left in Park thanks.
I've been through all of the combinations of the automatic gearbox when I worked through one of the suggestions made on a thread from ages ago, running through Park, Drive, Reverse etc a few times in case that made a difference, but it didn't. Thanks for the nudge though, it's great to know that there are so many people who are willing and able to offer advice and info. |
Jul 16th, 2019, 10:45 | #16 |
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Asked neighbour who tested the battery - these are his answers:
- He placed the tester probes on the negative and positive, the readings were 13.4v and that reading held when the key was being turned. - The engine would not crank at all. - They put the headlights on and normally the lights would remain on normally, but they dimmed straight away. |
Jul 16th, 2019, 11:23 | #18 |
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unless that battery had just been unplugged from being boosted / charged it deffo dodgy. A fully charged battery wont be over 13 volts if its been off charge for half hour
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Jul 16th, 2019, 11:26 | #19 |
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tbh first thing I would do is check fuses then failing that hit the starter with a rubber mallet / check the connections
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Jul 16th, 2019, 12:00 | #20 | |
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Quote:
Regardless, the battery voltage should drop during an attempted start so the fact that it doesn't suggests a major voltage drop problem. The suggestion of using a jump lead as an earth strap is an excellent and easy check as are voltage drop tests suggested earlier. If your neighbour was a diesel engineer, this is bread and butter work and he probably won't need telling. Tell him anyway though..
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