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[SOLVED] Tip-in knock/detonation
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Topic: [SOLVED] Tip-in knock/detonation (Read 13066 times)
contrast
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Re: Tip-in knock/detonation
« Reply #15 on: April 27, 2017, 05:42:13 AM »
I will search and log those variables.
Can you tell me please what should I search for in FR to find info regarding pre-emptive retard?
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contrast
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Re: [SOLVED] Tip-in knock/detonation
« Reply #16 on: June 28, 2017, 10:06:28 PM »
Hi all
Just to bump this thread and maybe help someone facing similar problem.
I have fixed the issue now. Volvo S60R has two CVVT camshafts. There is allowed adaptation range for mechanical and installation tolerances. This adaptation was -6.xx degrees for exhaust and -9.xx degrees for intake. Both should be zero ideally, but impossible to achieve. ECU should trigger a fault if deviation is larger than +-8 degrees. IDK why it didn't.
Anyway, turned my cams a little and reset the timing. Both cams are -1.xx degrees and a positive side effect is that engine has a lot more torque and feel much more responsive. I always thought it was warm weather why it felt so slow this year. Actually it was wrong camshaft timing.
Thanks to all for thinking along!
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t6
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Re: [SOLVED] Tip-in knock/detonation
« Reply #17 on: October 07, 2024, 08:52:19 AM »
Request to check variable valve timing, 1photo 720rpm, 2 photo 3000 rpm.
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Last Edit: October 07, 2024, 08:58:39 AM by t6
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