350z Rough running engine when VVT engaged.

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Kris Gray
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Joined: Sat Jan 26, 2019 10:47 am

350z Rough running engine when VVT engaged.

Postby Kris Gray » Sat Jan 26, 2019 11:02 am

I've previously had a Platinum Pro in a 350z and recently swapped over to an Elite 2500, but the same issue still plagues me.
The engine starts and runs fine until the VVT is engaged and then there's engine break up.
Any ideas?

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HaltechMatthew
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Re: 350z Rough running engine when VVT engaged.

Postby HaltechMatthew » Wed Feb 06, 2019 10:27 am

Daily drive a 350Z rev up myself and cant say I have had an issue.

The Exhaust Cams being electro-magnetic do not like to be controlled until the engine is at operating temp, and I don't engage mine until around 80C. Any earlier and they act erratically. I believe the OEM ECU also does not control them until a similar temperature which would show there is a know issue with the control method. Doing this makes it seamless.

The conventional hydraulic Inlet Cams can be controlled from quite cool temps, like around 30 to 40C.

s57_s2k
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Joined: Tue Mar 05, 2019 9:56 am

Re: 350z Rough running engine when VVT engaged.

Postby s57_s2k » Fri Mar 08, 2019 12:36 am

guys the value shown in haltech 350z variable cam timing table is for advancing the cams or retarding ?

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HaltechMatthew
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Re: 350z Rough running engine when VVT engaged.

Postby HaltechMatthew » Fri Mar 08, 2019 5:06 pm

For this engine, positive numbers for advance for inlet, and negative numbers for retard for exhaust if you have it.


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