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Old 08-24-2015, 04:06 AM
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Join Date: Aug 2015
Posts: 1
Question 1976 350SL FUEL DISTRIBUTOR

With all the injectors out and connected to the fuel distributor they all work perfectly when the damper is pushed down on the airflow meter.When I turn the engine over the injectors don't work.Any ideas please

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Old 08-24-2015, 09:50 AM
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Join Date: Feb 2011
Location: Modesto CA
Posts: 4,131

Some assumptions:
1) The car is outside the US, or is a grey market car in the US.
2) There is a safety switch on the airflow meter.
3) The key is turned to ON in test one, or the pump relay is jumpered.
4) The airflow sensor plate is NOT pushed down when you are cranking the engine.

First conclusion:
The pump relay bypass circuit is inoperative when cranking the engine.

The key switch contains a circuit that energizes the pump relay whenever the engine is being cranked.

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