Fonzerelli_jnr
Forum User
Hi All,
I'm looking for some help with a 1979 (registered T plate) 280zx auto.
It has been sat for the best part of 25 years and this is my first bash at a datsun. I'm pretty capable with cars as I am in the garage trade and have experience with restoring an '81 celica and also own a 1950's commer truck, a' 91 supra turbo plus a load of other rusty vehicles too long to mention! Having said that I like everyone else can miss something obvious and also have limited knowledge with this model of car which is obviously quite idiosyncratic to say the least.
At the outset I had no spark and no circuit at the injectors. A new coil, and a good clean up has cured the no spark condition. I now have a spark, if a little weak, and the engine will fire and run on easy start. I do not however have fuel injection. I have a working fuel pump with decent pressure and power at all the injectors but no switching earth from the Ecu. Further investigation reveals that I have no power supply at pin 27 of the Ecu and this is where I require some help from someone more knowledgeable than me.
From the factory wiring diagram pin 27 is fed from one side of the EFI relay, the other side controlling power to the injectors and the relay is in turn fed by a circuit passing through 2 fusible links. My problem in chasing this through is that I'm not sure of the location of the fusible links or the EFI relay. The FSM suggests that the two fusible links for the EFI are under the black cover with the other links and I have seen various photos on forums to support this but both terminals are empty on this car. There are two wires in one connector right by the battery and I'm wondering if this is what I'm looking for. Second to this the EFI relay is shown to be behind the plastic cover in the inner wing on the driver's side. I do have two relays here one of which I think I have identified as the horn and the other doesn't fit as being the EFI relay as the number of terminals is incorrect and also there is no continuity between any of these terminals and pin 27 of the Ecu.
So, could someone please point me towards the correct location of the both the fusible links and the EFI relay? Perhaps someone could post a picture of two of what I'm looking for?
I will attach some photos of what I'm looking at in case that will help. I will also attach a photo of some wires that are on the driver's side of the engine bay that are not connected to anything in the hope that someone may be able to help me with identifying them. They seem to go into the original wiring loom but I have no idea what they are for.
Apologies for the long sprawling post I hope someone can be bothered to read it all.
I'm looking for some help with a 1979 (registered T plate) 280zx auto.
It has been sat for the best part of 25 years and this is my first bash at a datsun. I'm pretty capable with cars as I am in the garage trade and have experience with restoring an '81 celica and also own a 1950's commer truck, a' 91 supra turbo plus a load of other rusty vehicles too long to mention! Having said that I like everyone else can miss something obvious and also have limited knowledge with this model of car which is obviously quite idiosyncratic to say the least.
At the outset I had no spark and no circuit at the injectors. A new coil, and a good clean up has cured the no spark condition. I now have a spark, if a little weak, and the engine will fire and run on easy start. I do not however have fuel injection. I have a working fuel pump with decent pressure and power at all the injectors but no switching earth from the Ecu. Further investigation reveals that I have no power supply at pin 27 of the Ecu and this is where I require some help from someone more knowledgeable than me.
From the factory wiring diagram pin 27 is fed from one side of the EFI relay, the other side controlling power to the injectors and the relay is in turn fed by a circuit passing through 2 fusible links. My problem in chasing this through is that I'm not sure of the location of the fusible links or the EFI relay. The FSM suggests that the two fusible links for the EFI are under the black cover with the other links and I have seen various photos on forums to support this but both terminals are empty on this car. There are two wires in one connector right by the battery and I'm wondering if this is what I'm looking for. Second to this the EFI relay is shown to be behind the plastic cover in the inner wing on the driver's side. I do have two relays here one of which I think I have identified as the horn and the other doesn't fit as being the EFI relay as the number of terminals is incorrect and also there is no continuity between any of these terminals and pin 27 of the Ecu.
So, could someone please point me towards the correct location of the both the fusible links and the EFI relay? Perhaps someone could post a picture of two of what I'm looking for?
I will attach some photos of what I'm looking at in case that will help. I will also attach a photo of some wires that are on the driver's side of the engine bay that are not connected to anything in the hope that someone may be able to help me with identifying them. They seem to go into the original wiring loom but I have no idea what they are for.
Apologies for the long sprawling post I hope someone can be bothered to read it all.
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