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S40 T5 Starting problem

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Old Sep 9th, 2019, 13:13   #11
domhart10
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funily enough I came across this thread in google which was quite funny as my car is now failing to start mid build .... so I thought I would update this.

Car ran fine after I raised this without any problems. But today in the garage it failed to start with a suspected spark plug issue so spark plugs are on the way, hopefully tomorrow they will arrive and cross fingers solve the issue.

fuel pressure fine and crank signal fine.
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Old Sep 9th, 2019, 14:14   #12
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Spark plugs wouldn't cause it to not start, unless they're hugely ****ed.

You'd just get lumpy running and small misfires.

When you say it won't start, is it completely dead?
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Old Sep 9th, 2019, 14:45   #13
domhart10
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Quote:
Originally Posted by FunkyMelon View Post
Spark plugs wouldn't cause it to not start, unless they're hugely ****ed.

You'd just get lumpy running and small misfires.

When you say it won't start, is it completely dead?
Yeh just dead, wont turn over.

Its had a new battery and new alternator as well. I have been looking at what else and read something about issues with fuel injectors.
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Old Sep 9th, 2019, 15:52   #14
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Quote:
Originally Posted by domhart10 View Post
Yeh just dead, wont turn over.

Its had a new battery and new alternator as well. I have been looking at what else and read something about issues with fuel injectors.
Earthing issue?
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Old Sep 9th, 2019, 16:00   #15
domhart10
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Earthing issue?
maybe ... will check with Shem tomorrow. Still leaning towards the spark plug or coils area as these havent been changed since I have owned the car. must of had it over 4 years now from 43k and now on about 139k.
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Old Sep 9th, 2019, 17:23   #16
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Quote:
Originally Posted by domhart10 View Post
maybe ... will check with Shem tomorrow. Still leaning towards the spark plug or coils area as these havent been changed since I have owned the car. must of had it over 4 years now from 43k and now on about 139k.
Surely Shem has the means of finding this out pretty quickly?
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Old Sep 9th, 2019, 22:35   #17
domhart10
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Quote:
Originally Posted by FunkyMelon View Post
Surely Shem has the means of finding this out pretty quickly?
Yeh he said its hopefully just the spark plug so ordered some tight away. Will see tomorrow if there has been any progress.
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Old Sep 10th, 2019, 15:37   #18
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100K on the same plugs!

Be careful running plugs this long as the increased resistance can drag the coils down with them eventually £££

Poor plugs will prevent an engine starting from cold, they almost end up getting wet from the fuel being injected. Poor plugs and coils wont stop an engine from turning over though.....
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Old Sep 10th, 2019, 18:47   #19
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Quote:
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Poor plugs and coils wont stop an engine from turning over though.....
That was what I was thinking, but Shem will know more than I!
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Old Sep 19th, 2019, 11:29   #20
domhart10
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As you guys predicted plugs didnt solve the problem and car still fails to start. Initially I thought it was the fuel pump that might of caue the problem but Shem checked and said thats fine

Fuel pump by Dom Hartland, on Flickr

Things that can be rules out:
- Battery
- Alternator
- Plugs

Still on original:
- Starter motor
- coils

Car was running after the pump was installed as well. Think Shem is still looking around but if anyone else has any idea's then lets hear them!
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