Mivec Owners Group

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 Post subject: Cj4a 4g92 Mivec error
PostPosted: 30 Oct 2014 11:18 
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Joined: 30 Oct 2014 10:26
Posts: 2
Country: Cyprus
Hello there!!! I am trying to find out why Mivec won't work correct....
The car it's rannig well but when I pass the 5100 rpm the Mivec won't always work correct...
Sometimes I can hear the difference from standard to Mivec but some times it sound really bad is like no difference in Mivec or out....
But the car go to 8100rpm all time!!
Any idea what is the problem??


Thnx!!!


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PostPosted: 30 Oct 2014 13:37 
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Joined: 29 Mar 2009 13:11
Posts: 370
Location: Co. Cork
Country: Ireland
Usually poor oil pressure from a dent in the sump pan- even a minor dent.
Faulty temperature sensor is the next most common ailment.

There are more reasons.


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PostPosted: 31 Oct 2014 12:16 
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Joined: 30 Oct 2014 10:26
Posts: 2
Country: Cyprus
Thnx for the answer but I have already checked those thinks and everything looks good.... Any other reason??? One more thing that I realize is at if the car is not really hot I mean it just rich the temp for Mivec to work, they work good!! If I drive the car for some time Mivec some times work sometimes not....


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PostPosted: 03 Nov 2014 03:03 
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Joined: 29 Mar 2009 13:11
Posts: 370
Location: Co. Cork
Country: Ireland
alex3thy wrote:
Thnx for the answer, but I have already checked those things and everything looks good.... Any other reason??? One more thing that I realize is if the car is not really hot, I mean it just reaches the temp. for Mivec to work, they work good!! If I drive the car for some tim,e Mivec sometimes works sometimes not....


That to me would suggest an oil pressure problem, as the oil becomes thinner as the engine warms, reducing oil pressure. Even if the lower sump pan is flat- which often happens from the engine resting on a pallet, or bench etc. there should be a small convex curve on the pan.


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