desperate cry for help....

[FD3SNuttah]

checked it out and i think your onto something G. Im convinced I missed something out and i need to take another look at the wiring,.

as far as the ecu knows its still an s5 BT. the injector loom is built into the engine loom so i didnt have to touch that plug.

i reckon an injector rewire should sort this problem out. then its the next problem! :Hammer

[grinder]

let us know how you get on

i know it can be a problem .. im sure there is something in the loom on the S4 that alters the impedance

rx7club.com have a lot more info on this - probably as they run S4 turbos accross there and we dont

happy reading matey !!

[Prof]

Like Stu said, the S4 had low impedance injectors, so there is a resistor pack in the harness that will be in series with them.

If you have an S5 engine / injectos and harness - and the S4 loom, you may only be getting about half the voltage across the injector, and it may not fire reliably.  Quick fix/test is to locate and put a bridging wire across each resistor shorting them out - this should restore normallity.

Hope that helps get your beast a thrumming :3gears-rh

Cheers,

Prof :cheers

[Grizzly]

I can\'t see how the Injector Imp would cause the problem?? You can usaly tell if the injectors are workingm when you turn the Ingition on they Click even if they are not the correct ones.

I know you can\'t plug a S5 loom into a S4 injector, i also know you can\'t plug a s4 loom into a S5 ems.

If i was you, i would first check all the plugs that you took off for bent pins etc, you\'ve oviously checked for Spark and fuel, then make sure the EMS is grounded properly, if no joy check the Serial number on the EMS (make sure its a manual ems) then possably borow an EMS of some one and try it again just to make sure its working properly maybe even plug it into a diffrent car and see if that starts?? you may have dry solder in it or it may be for an Auto and its overfueling on start up???

Also if the car was an NA have you swaped the Fuel pump? Maybe there is not enough PSI going through the fuel rail?? if it will run on easy start.

[Grizzly]

I know from experiace it don\'t make any diffrence if you swap the Injector plugs round it will still start and run just not as well as if the injectors are correct.

I got one for you, Make sure the OMP is pluged in and working correctly. My Car would\'nt run when i had a bad OMP fitted a while back, that cuts the fuel on a S5.

[FD3SNuttah]

the impedance should be fine - the s5 ecu is matched to the engine that is installed.  i dont think that it should matter really. more info on injector impedance here - http://www.rotaryresurrection.com/rotary%20pages/injector%20folder/injector.html

Im not hearing a click from the injectors when the ignition is on.

i been reading searching / reading more then searching again - and i came up with this from the rx7club -  so here i think is my answer!
---------------------

The ECU switches the injectors by grounding them. There are two black wires on the ECU that lead to a ring terminal on the vac spider on the top of the engine. Those wires are the ECU/injector grounds.

The 12v to the injectors comes from a plug on the Emissions harness. That harness runs from the ECU ....around into the engine bay and across the front of the engine to the injectors. One plug on this harness is located inside the passengers side compartment. It does not connect directly to the ECU, it connects up above and to the right of the ECU. Waaay up there. Maybe a bad connection there?

----------------

ok i didnt wire the emmisions harness plug up - i simply buggered that as i planned to ditch al of that emmisions crap - according to the above - you can see what i have done here - without realising i havent wired the constant 12V supply to the injectors. so i need to find the wire on the emmisions plug and give it 12 volts? however it doesnt say if this is s5 or s4

best get me FSM and the soldering iron out!!! i will post up progress in a day or so.

[grinder]

i hope this works matey

on the flip side - if it doesnt - then its one less thing to worry about

[FD3SNuttah]

i found the wires going to the injectors HOORAY! but the problem is that they constantly click like mad when i put 12V to em when in the ON position?? yeh.... and how come it says in the FSM that the ecu pin outs 3w,3x,3y,3z are for the injectors - the injector wires run from the EMISSIONS harness? HUHHHHH??? :Hammer

do i run the wires from the pin outs here?? meh im all confused - think more reading about the injection system is required!

thats if i dont lose all sanity first! waheyyy lol :rolleyes:

[Brett]

ecu = emission control unit in fsm speak :yes

[FD3SNuttah]

Theres four plugs on a engine harness right - three go into the ECU-ECU and one goes to the ecu lol seeeee!

[grinder]

there is 3 in the ECU

the other could be for the ABS ( not on the cab though ) or the stock alarm

[FD3SNuttah]

lol dont worry too much about it - three plugs are for the main ecu - and one is for the emmisions! the power for the injectors runs off the emissions! luckily i cut the plug off from the s5 before i scrapped it - hoooows that!!!!!!

anyway lads - im getting my hopes up - im real close to pulling this off i can feel it!!!

[grinder]

better hurry Nas before you miss summer !! LOL

[FD3SNuttah]

hey rotorheads!!!  ive wired up me injectors and now hearing them "click" when the iggy is on - the battery was low (barely turning the engine over) so ive put it on charge!!

in the meantime let us prey...

Dear God

Please help me "wing" this s4 - to s5 13bt engine swap!! yeh and we thank you for giving the human race a rotorised cabrio!! :god

amen!!

-- if it doesnt work now - no problem!! im getting the hang of this rotor business - when i finally finish this cabby and enjoyed it...

I reckon im going to rotorise my RWD 1980 mitsubishi sigma wagon!!!

[FD3SNuttah]

yep started up pretty much right away - great feeling that was - ran it for a good five minutes before the neighbours came out tellin me to turn the racket down! :Nono!  even im slightly deaf because there was no exhaust on there.. sounded just like a bridgy!!! :Party :Thumbs-up :Viking :King :Laugh :yes

still got little odd stuff to do  --

1.    give her a bloody good clean!
2.    sort out a few scratches here n there get it mint looking
3.    fit exhaust
4.    fit new alloys n tyres
5.    fit gorgeous leather seats
6.    wire up rear fog light / reversing light
7.    MOT!
8.    wire up stereo (gotta have me tunnnnes!)
9.    fix a little seam thats come apart on the hood. (btw anyone know how   much are these to replace?)
10.  drive and enjoy!!!

anyway id like to say thanks for all the hlpful advice you lot have given me. :Ladys-man