Stumblin Bumblin Z - ZR-1 Net Registry Forums

John Boothby · 06-13-2012

Does it do this when the engine is cold? Does it do this if you just ease the throttle to above 3K? If it does, it may not be the secondary vac sys. Do you get a "Service Engine Soon" light when you step on it?

When my actuator went bad I got a "Service Engine Soon" light intermittently. It would go out after about 10 sec after I let off the throttle. This light will come on it the secondaries do not open.

Just a guess, I havn't heard anyone mention this, but could it be the speed sensor? This failure will limit the engine to 3000 rpm limp home mode.

06-13-2012	#7
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 775	Re: Stumblin Bumblin Z Does it do this when the engine is cold? Does it do this if you just ease the throttle to above 3K? If it does, it may not be the secondary vac sys. Do you get a "Service Engine Soon" light when you step on it? When my actuator went bad I got a "Service Engine Soon" light intermittently. It would go out after about 10 sec after I let off the throttle. This light will come on it the secondaries do not open. Just a guess, I havn't heard anyone mention this, but could it be the speed sensor? This failure will limit the engine to 3000 rpm limp home mode. Last edited by John Boothby; 06-13-2012 at 08:52 AM.

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