Toffa93 Posted March 1 Report Share Posted March 1 Hi all, Quick overview of what i have tried and are now wanting to do... Acquired the car, a Naturally Aspirated 4EFE 4WD Model, that i am fitting my forged 4EFTE Into. It came with a full 4EFTE Wiring harness (engine, dash, rear to lights etc) which i promptly set about trying to fit, until i realised that the heaters, airbags, seatbelts, fuel system, and various other modules wouldn't work.... ARGHHH!! So, what i am looking to do (and probably should have done in the first place) is wire in a Monsoon. I am wanting to piggy back this as much as possible. Am i right in saying the below would suffice for my application? (some info grabbed from @Vaughan Thread on Caldina ST246 Query, which i have amended / added to) Run the 4 injector wires to the new ECU instead of the original. Run the Distributor wiring to the new ECU, the dizzy runs the 4 spark plug leads, and also has the cam sensor in, would this need to be spliced into so the OEM ECU Still sees this data? I'm thinking i will have to modify the trigger wheel so the LINK Can understand it? Branch off TPS and run to new ECU As well as old Run internal map sensor on NEW ECU Run new IAT Sensor Branch of ECT (or add a separate one), if branching you cannot be applying your own pullup (So can't use an AN Temp pin on Atom or Monsoon for this) and might need to make a custom calibration. Maybe take control of the fuel pump with the aftermarket ECU? Power and ground supplies to aftermarket ECU. link signal grounds, probably leave 5V disconnected from factory loom. In addition to the above, the 4EFTE Runs a knock sensor which the 4efe doesn't, so i will run one of them to the LINK. 3 port boost solenoid also perhaps, if i don't just run it via the actuator... Am i right in thinking the main sticking point here is going to be the dizzy? the 4EFE Has a combined ignitor etc (which id like to retain if poss) compared to the EFTE That has a separate coil on the bulkhead. Assuming it has more power... The only reason i want to run it piggy back is for ease. and there being other modules etc running off the stock ECU. If its easier, i don't mind going to COP, and chopping up the dizzy so it just sends the CAM Signal) Like on the ME221 Etc ecus. (trigger wheel is modified). Simple is the goal, but if it aids in it being piggyback i dont mind adding stuff! Thankyou! Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 2 Report Share Posted March 2 There would be no need to do a piggyback in this, it is an old basic car with likely very little integration between the ecu and anything else in the car, about as basic as it gets. It would be a bigger job to make it work as a piggyback than it would as a complete replacement. The only integration with the chassis will be a tacho and CE light wire to the dash, a speed input either from the gearbox or speedo, an AC request from the AC amp, and possibly a power steering sw, that will be about it. Quote Link to comment Share on other sites More sharing options...
Toffa93 Posted March 3 Author Report Share Posted March 3 8 hours ago, Adamw said: There would be no need to do a piggyback in this, it is an old basic car with likely very little integration between the ecu and anything else in the car, about as basic as it gets. It would be a bigger job to make it work as a piggyback than it would as a complete replacement. The only integration with the chassis will be a tacho and CE light wire to the dash, a speed input either from the gearbox or speedo, an AC request from the AC amp, and possibly a power steering sw, that will be about it. Hi Adam, Ok mate, piggyback probably the wrong word there then i think, if i was to use as much of the OEM Loom as possible (Its all in v nice condition), is it a case of just wiring in everything possible to the Link? No sharing of sensors / info? Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 3 Report Share Posted March 3 Piggyback means you would have 2 ecu's connected. I would cut the factory plug off, crimp the Link plug on in place of the factory one. There will likely need to be some small changes to wiring such as a relay added in to trigger the factory factory EFI relay etc. Quote Link to comment Share on other sites More sharing options...
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