help diagnosing problem

Engines, Transmissions & Final Drive questions and answers

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JSE
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Joined: Mon Jan 02, 2006 10:38 am
Vehicle: ND - 2 GT
Location: sydney

help diagnosing problem

Postby JSE » Tue Jan 22, 2008 6:54 pm

at idle or at constant speed it sounds like a rotary.

like the idle timing is bouncing up and down...sounds exactly like a rotary.

also when next to another car or wall i can hear it like a hissing intake noise up and down in pitch.

any ideas?
idle timing?
throttle body or accell cable?
sparkplugs?
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Okibi
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Postby Okibi » Tue Jan 22, 2008 7:32 pm

Checked for leaks in your intake? That will make a hiss and effect idle.

A leak at the exhaust gasket will also make a hiss and change the engine note.
If you had access to a car like this, would you take it back right away? Neither would I.
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JSE
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Joined: Mon Jan 02, 2006 10:38 am
Vehicle: ND - 2 GT
Location: sydney

Postby JSE » Tue Jan 22, 2008 9:25 pm

yeh i checked the intake tubing and filter...its all tight and no holes, gaps...

will check exhaust tomorrow - could be because i have been getting wicked exhaust rattles lately. could just be the heatshielding but as per usual na6
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