Hunting RPM/ Engine Speed

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Hunting RPM/ Engine Speed

I am experiencing very frequent hunting (continuously dancing/ oscillating RPM and thus the engine speed) on my AT Civic Vti (D16Y engine). The condition appears only on a fully warmed up engine while in idle (P 'n N only).

Can anyone kindly suggest the possible causes besides IAC valve, IAT sensor, plug fouling (since these have been checked)!! A strange observation is that the hunting disappears with bosch super 4 plugs though i dont find it convincing enuf to justify a hunt, i rather assume the enhanced firing somehow sends an ok signal to the ECM!

any expert opinions please????

Gari.pk User 4348 asked on 15 Jul 2010 13:34:50 pm

1 Answer

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Huzaifa - on 15 Jul 2010 13:35:05 pm

definately MAP sensor is disturbed or its wiring is wrongly done. Similar problem encountered when i converted my vti-prosmatec to cng. taken out the very next day