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XC70 D5 Surging / Throbbing idle

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Old Oct 22nd, 2020, 13:26   #11
cheshired5
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Quote:
Originally Posted by fred8601 View Post
I'm curious to know what you make on my last post?
Those figures don't show a problem so I'm assuming that no fault code was triggered during the test.
Is that correct?

Also, was the throbbing and surging still apparent?
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Old Oct 22nd, 2020, 14:42   #12
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Originally Posted by cheshired5 View Post
Those figures don't show a problem so I'm assuming that no fault code was triggered during the test.
Is that correct?
I've been struggling with this one.... I don't seem to be able to clear those temporary error codes. I try to clear them with ignition on, engine off, then turn the ignition off and back on again and they are still there. Am I being thick or missing something?

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Also, was the throbbing and surging still apparent?
It's still there, but it's slight and only on a cold engine at the moment.
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Old Oct 22nd, 2020, 15:36   #13
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I try to clear them with ignition on, engine off, then turn the ignition off and back on again and they are still there. Am I being thick or missing something?
I only use Vida so I've no idea. Not every other code reader can successfully clear every code so all you can do is follow the prescribed routine for your particular diagnostic system.

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Originally Posted by fred8601 View Post
it's slight and only on a cold engine at the moment.
Have you tested all 5 glow plugs and if so, what were the results?
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Old Oct 22nd, 2020, 17:53   #14
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Originally Posted by cheshired5 View Post
I only use Vida so I've no idea. Not every other code reader can successfully clear every code so all you can do is follow the prescribed routine for your particular diagnostic system.
Can you point me in the direction of a VIDA please? It sounds like a powerful tool but want to ensure I get the correct one and not sure I trust ebay etc to get a genuine one.

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Have you tested all 5 glow plugs and if so, what were the results?
I haven't done this test yet - what's the best way to go about that?
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Old Oct 22nd, 2020, 18:39   #15
barrybritcher
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wouldn't a leaking engine mount cause fluctuating idle?
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Old Oct 22nd, 2020, 20:29   #16
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Originally Posted by fred8601 View Post
Can you point me in the direction of a VIDA please? It sounds like a powerful tool but want to ensure I get the correct one and not sure I trust ebay etc to get a genuine one.
I've been selling tested and guaranteed working tools for years. My sales thread is here.

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I haven't done this test yet - what's the best way to go about that?
From one of my recent posts.....
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Originally Posted by cheshired5 View Post
pull the electrical connectors, black meter lead on the engine block, red lead on the exposed glow plug top.
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Old Oct 22nd, 2020, 22:00   #17
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Originally Posted by barrybritcher View Post
wouldn't a leaking engine mount cause fluctuating idle?
Interestingly there does seem to be a fair amount of clunking going on when I drive, I assumed it was a bushing in need of replacement but perhaps the two problems is in fact one?
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Old Oct 22nd, 2020, 22:39   #18
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wouldn't a leaking engine mount cause fluctuating idle?
I'd be surprised on a Euro 4 as they're not linked to the boost system like on the Euro 3.
Still, you don't want leaking mounts and they're simple to test with a vacuum tester so worth checking their operation regardless.
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