idle speed problems after installing kinetix manifold and JWT camshafts - Nissan 350Z Forum, Nissan 370Z Tech Forums
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#1 (permalink) Old 09-15-2006, 12:22 AM
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Hello, I have an urgent request AND I need your help, I have just installed the JWT camshafts and the KINETIX manifold on my 2003 350Z, but the engine is having idle problems, it stalls after a few seconds that the engine is left at idle speed, it revs strong and fast when the accelerator is pressed on so the problem is just present at idle speed, I have already checked the OBDII system with my scanner and no faults are detected by the scanner, so I want to know if this rough idle condition including that the engine stalls is normal with this type of racing camshafts and manifold or maybe I should have a problem in an other area of the engine, the ECU I am using is a reflashed stock unit that is included in the TURBONETICS turbo kit I have installed about 6 months ago and never had problems until now
please reply urgently.....
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#2 (permalink) Old 09-15-2006, 12:59 AM
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I would check the manifold to make sure there are no leaks.
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#3 (permalink) Old 09-15-2006, 01:02 AM
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yes, i also second about that leak

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#4 (permalink) Old 09-15-2006, 01:10 AM
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I would check the manifold to make sure there are no leaks.
I have already checked for leaks and I have no aparent leaks, I have been told that using this type of racing camshafts require the ECU to be retuned but I dont know, also I will like to know how can I raise the idle speed in this 2003 Z to smooth things a bit...
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#5 (permalink) Old 09-15-2006, 01:11 AM
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What gasket did you use?


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#6 (permalink) Old 09-15-2006, 01:17 AM
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What gasket did you use?
I used the cork gasket that comes with the intake
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#7 (permalink) Old 09-16-2006, 01:58 PM
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If you contact JWT, I'm sure the'll confirm that you need to raise the idle speed for those camshafts. Are these the S2's? If so, it says right on their website that ECU tuning is required. Since you already have a turbo on the car, you might want to consider stepping up to a Turbo XS UTEC or HKS V-Pro.

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