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Car Forum / Nissan / Nissan Z Cars / December 200378 280z with fast idle
I recently failed emisions and had some adjustments made on my engine (L28 efi) and now when ever i stop or slow down the idle stays at about 2 and a half grand and the only way to get it to idle normaly once im stopped is to tap the acelerator pedal. any help would be apreciated. Thanks > I recently failed emisions and had some adjustments made on my engine > (L28 efi) and now when ever i stop or slow down the idle stays at > about 2 and a half grand and the only way to get it to idle normaly > once im stopped is to tap the acelerator pedal. any help would be > apreciated. First check to see if the throttle blade is actualy closing, they may have messed with the throttle switch? If it's closing and still high idle, it's the BCDD valve.  SignatureSteve http://www.atlantaracing.com Ok. question what is a BCDD? is that that little round thing with a little hook on it? >> I recently failed emisions and had some adjustments made on my engine >> (L28 efi) and now when ever i stop or slow down the idle stays at [quoted text clipped - 5 lines] >messed with the throttle switch? If it's closing and still high idle, it's >the BCDD valve. > Ok. question what is a BCDD? is that that little round thing with a > little hook on it? It's the valve on the underside of the throttle housing. It is basically a deceleration control device that opens up a throttle bypass under high vacuum. They can get flakey and cause the engine speed to hang. I have no idea what "That little round thing with a little hook" is! :-) SignatureSteve http://www.atlantaracing.com Sounds like a sticky choke. Possibly the mechanism can be sprayed with something that will lubricate and also clean it. rtt > I recently failed emisions and had some adjustments made on my engine > (L28 efi) and now when ever i stop or slow down the idle stays at > about 2 and a half grand and the only way to get it to idle normaly > once im stopped is to tap the acelerator pedal. any help would be > apreciated. Thanks > Sounds like a sticky choke. Maybe if it had one? SignatureSteve http://www.atlantaracing.com |
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