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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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Jul 4th, 2022, 19:39 | #1 |
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Poor starting
Step daughters C70...again! It's a 2001 2.4lpt manual,has begun taking several seconds to start once it does start it runs fine.While I'm going to borrow a code reader[it'll be a cheap one but hopefully it'll give me an idea what's going on]this coming weekend but maybe someone on here has some idea[s].Symptoms are a longer cranking time before it starts than it used to have but runs fine once started.Two things to note sometimes[but not every time]when cranking the rev counter needle will jump up to 2,000 revs before dropping instantly back to where it should be-so it's just a quick flick of the needle.Secondly on one start up last week the ETS light stayed on for her journey to work but hasn't done so since.Where does the rev counter pick its signal up from? On the journey with the ETS light lit the car ran fine without problems.
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Jul 5th, 2022, 05:20 | #2 |
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Classic symptoms of a failing antenna ring but don't think it's related to the EML...it may be but possibly something engine related bringing that up.
Before throwing money at it firstly try removing the steering cowel and clean the antenna ring connections thoroughly with contact cleaner and see if that improves the poor starting. Also check the battery terminals for good measure. And if you have a multimeter test the battery is holding over 12.5 volts overnight and should be receiving approximately 14 volts at idle.
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Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav. |
Jul 6th, 2022, 08:58 | #3 |
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Someone she works with used a cheap code reader on it yesterday and apparently it came up with crank position sensor which I must admit sounds plausible but will do other checks first before committing to buying one.If it does come down to that what brand is everyone buying and where from?
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Jul 6th, 2022, 09:57 | #4 | |
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To me this doesn't sound like antenna ring, symptoms for that is that the engine starts fine but almost immediately dies, which isn't quite the symptoms you're describing. Given the code etc., I'd be looking at replacing the crank sensor and see how it goes. If it's on the way out better replace sooner rather than later, as if it goes completely then you're left with a totally dead engine. Cheers!
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Jul 7th, 2022, 18:29 | #5 |
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Good shout, Luxo, my mistake! I just hate to see people replacing parts unnecessary when it can be something as simple as cleaning a sensor or connection.
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Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav. |
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Jul 7th, 2022, 20:04 | #6 |
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It cranks just fine but takes longer to fire than it did and generally seems worse when the engine is warm[just as my Omega did] I will however check earths etc and give it a go cleaning the CPS. If it comes down to replacing it are aftermarket ones any good? Admittedly the ones on the Volvo are easier to get to[being on top of the bellhousing]than the Omega[where you have to get underneath the car]but I'd rather not waste her money on aftermarket if they're not reliable enough.
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Jul 6th, 2022, 11:21 | #7 | |
Extrahumanestrial
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Quote:
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Jul 7th, 2022, 09:13 | #8 |
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Yes I know the engine will shut down/fail to start if the sensor dies-I've had it happen before on my Vauxhall Omega V6[they don't react well to aftermarket sensors so had to buy genuine from a main dealer for that].Didn't know you could try cleaning them though! What would you use to try that?Grateful for suggestions so far and always happy to hear any more.
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Jul 7th, 2022, 11:21 | #9 | |
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If you can get it out I would try carb or brake cleaner on it if a simple wipe doesn't clean it anyway, Before you do though I would check the earth strap from the battery if you haven't already, I'd also suspect the starter motor as brush wear can make them lazy, I had a MKIII Cortina that did it but never got to the bottom of it, When you say bad starting, is it slow cranking or simply taking longer to fire? Reading back I don't think it's going to be the crank sensor so hold off that for a bit for now. You mention longer cranking times, I'd be all over the fuel delivery systems first if the crank is strong but just taking longer to catch. Last edited by SnineT; Jul 7th, 2022 at 11:26. |
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