Toyota Previa diesel 2002 lack of power valve timing?

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RYM6746
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Re: Toyota Previa diesel 2002 lack of power valve timing?

Post by RYM6746 »

Sorry for my lack of knowledge but how do you use exhaust lifter operation portion of 57.75 camshaft degrees to check the EVO against crankshaft degrees on the in cylinder pressure waveform? Surely you need to know the EVO or IVO in reference to crankshaft degrees?

victor2k
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Re: Toyota Previa diesel 2002 lack of power valve timing?

Post by victor2k »

Hello,
According to the attached file your intake valve must be opened for 213 crankshaft degrees(on your engine 215-220) and exhaust valve must be opened for 231 crankshaft degrees(on your engine only 210),so the exhaust valve close too early/open too late.
Maybe you must check the valve clearance adjustment using the attached SDS or your exhaust is partially blocked.
Best regards
Attachments
previa_diesel.rar
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Last edited by victor2k on Sat Dec 26, 2020 10:31 pm, edited 2 times in total.

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RYM6746
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Re: Toyota Previa diesel 2002 lack of power valve timing?

Post by RYM6746 »

How on earth does an exhaust valve open 18 degrees after the intake valve? That makes no sense? How have you worked out when the EVO is in regard to crankshaft degrees? I still can't see any IVO or EVO in the last upload? Are we missing something here?

victor2k
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Re: Toyota Previa diesel 2002 lack of power valve timing?

Post by victor2k »

RYM6746 wrote:
Sat Dec 26, 2020 8:48 pm
How on earth does an exhaust valve open 18 degrees after the intake valve? That makes no sense? How have you worked out when the EVO is in regard to crankshaft degrees? I still can't see any IVO or EVO in the last upload? Are we missing something here?
Sorry,we were fighting for something?

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RYM6746
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Re: Toyota Previa diesel 2002 lack of power valve timing?

Post by RYM6746 »

No. Just can't make any sense of the information you are providing? Trying to figure out what I am missing that you are seeing?

victor2k
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Re: Toyota Previa diesel 2002 lack of power valve timing?

Post by victor2k »

Ok,here you will find what you need
Attachments
Capture.PNG

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RYM6746
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Re: Toyota Previa diesel 2002 lack of power valve timing?

Post by RYM6746 »

Perfect. Thankyou very much. Where do you find such valuable information?

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