Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z - View Single Post - 78 280 idle mystery
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post #3 of (permalink) Old 04-22-2019, 11:41 AM Thread Starter
Silky250
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Location: BC, Canada
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Checked all connectors. Everything seems fine. Replaced at the injector pigtails a year ago. Pulled the hose going into the air bypass valve. The one that connects to the rubber intake boot. Idle smoothed right out.
If I block the air bypass the engine would almost stall, which is what I’d expect. Oddly enough if I plugged the hose coming from the rubber boot before the AFM I’d get the same result. Checked my air filter. Basically
New. Disconnected the rubber connector up stream of the AFM. Car started and idled fine. Connected air filter rubber boot and everything was fine. So basically everything is assembled as it should be and it’s running /idling great at the moment.
I’m going to try and heat cycle a couple more times and re torque.
Gotta love old Datsun.

78 280, possible black pearl
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