Re: what is the INJECTION relay in my 1979 Turbo? - Saab Saab Model 99 Bulletin Board - Saabnet.com
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I am not too familiar with the fuel injection in European 99 Turbo cars as all the US cars (1978 only) have the Lambda system and so they have a different relay. However, I think that the relay might be for the over-pressure cutoff function (the boost pressure switch that is on the left side of the car will open and shut off the fuel pump if the turbo boost goes too high). I would think that the European cars without Lambda still have that same function as it is there to protect the engine when the wastegate diaphragm fails. I think that the fuel pump is also turned off if engine revs go too high. In the lambda cars all of those functions are handled in one larger relay which covers both of those sockets.
I hope that helps!
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