Can anyone help me out please.
I am making up a new fuel injection wiring loom for my 4.2 serpentine engine(I do not have the original) but am unable to find the correct circuit diagram. The best I can come up with is a 1990 3.9 one. I believe the engine is about 1996 - 1998? Are they the same? Any help would be appreciated.
Many thanks.
Rover 3.9/4.2 serpentine fuel injection circuit diagram
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The 3.9 and 4.2 will have virtually the same wiring diagram, they are both hotwire.
It will make more difference with respect to which vehicle you intend to fit the engine. An appropriate diagram will show all the link connnections arriving at the correct point for connection into the vehicle wiring loom, ie, speed sensor, A/C control, fan control, fuel pump inertia switch.
If the target vehicle is not an RRC LSE then go for the later versions, ie 95 RRC 3.9 or 97 3.9 Discovery 1 as these will include all options.
jw
It will make more difference with respect to which vehicle you intend to fit the engine. An appropriate diagram will show all the link connnections arriving at the correct point for connection into the vehicle wiring loom, ie, speed sensor, A/C control, fan control, fuel pump inertia switch.
If the target vehicle is not an RRC LSE then go for the later versions, ie 95 RRC 3.9 or 97 3.9 Discovery 1 as these will include all options.
jw
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jenand40
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Chris/JW thanks for your responses.
The 4.2 is actually a brand new intermediate stripped engine to replace the 3.5 engine I currently have in my Triumph Stag.
I have also bought a complete 3.9 intermediate serpentine engine just for the front pulleys/brackets etc.
The latest circuit diagram I can find is for the 1990 hotwire system, so I guess my question is "Is there a difference between the 1990 hotwire system and the later 1996/98 serpentine hotwire system?"
Would still like to locate a circuit diagram for the later system though.
Again many thanks.
The 4.2 is actually a brand new intermediate stripped engine to replace the 3.5 engine I currently have in my Triumph Stag.
I have also bought a complete 3.9 intermediate serpentine engine just for the front pulleys/brackets etc.
The latest circuit diagram I can find is for the 1990 hotwire system, so I guess my question is "Is there a difference between the 1990 hotwire system and the later 1996/98 serpentine hotwire system?"
Would still like to locate a circuit diagram for the later system though.
Again many thanks.
