Thread: Can a ISCV cause idle revs as high a 2500 rpm??
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Old Jul 6, 2009 | 03:01 PM
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cozmeister
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Originally Posted by puntogtkid
my idle is at roughly 1700 Rpm at all times, hot cold etc... what is the correct idle speed, mine is a stage 3 set up..
Ste
850rpm for L6 ECUs, and 900 for L8 ECUs - check which you have got first.

Disconnect your ISCV and see if the idle drops - should drop to more-or-less the correct idle speed. If it drops, then your ISCV is either gunged up and stuck open or broken. If it stays high, then you might have a leak somewhere on the inlet side, maybe a blown inlet manifold, plenum or throttle body gasket, or slightly more likely, a split or loose-fitting hose on the inlet side.
Last edited by cozmeister; Jul 6, 2009 at 03:13 PM.
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