Hi ,ive got an early s2 erst and the code is something like Blue,red,white. However without checking ive bought a chipped ecu and fuel ecu from ebay to replace it instead of having my one chipped. The one i bought from ebay is red,blue,black. Will it still work? Or if not can i take the chip out of that ecu and put it in my ecu?

 

Yes it will work 100% mate dont worry! They are all interchangable!

 

Someone on rs club just said they are not interchangeable as different part numbers f4rom ford - whats right?

 

i thought the only difference was early 1s worked without having a knock sensor?

shud still work fine

 

I havent got a knock sensor on mine.I was told just leave the knock sensor discon and it will be ok?

 

if u have a knock sensor connection on ur loom, it has to be connected, otherwise its gna confuse things

 

ok i have a series 1 ecu on my s2, i have a knock sensor its connected, is it ok like this?

 

yeah im pretty sure from what iv read, thats fine. only an issue if u have a knock sensor fitted loom, n the ecu requires a knock sensor, and u leave it unplugged

the s2 ecu doesnt require a knock sensor, and thats why some people favour fitting them

 

im sure all rst ecu's are interchangeable except hearts and diamonds one

 

They are interchangable, and will work perfectly, but only if correct mod's that are needed are carried out.

 

Just to clear this up for you all!

Every ECU will work on every rs turbo including hearts and diamonds!!

No mods needed unless you are putting a S1 Fuelling ECU on a S2 then the TPS needs rewiring or it will not work.

The knock sensor does NOT need to be plugged in and only came fitted to the later S2's, many of us unplug it because after so many years its got oversensitive and ends up retarding your timing cos it thinks your detonating when your not!

This i know form my own experience

 

but surely if the loom has a knock sensor, and the ecu runs in conjunction with said knock sensor, unplugging it will give u the same sort of results as disconnecting any engine sensor, engine goes into limp mode, retards ignition, n runs like a bag of wank?

fine if u run an definite early spec ecu, otherwise, thats surely a problem

 

how do you know if your timing is retarding?

 

Ignition ECU (silver) =

The det sensor is best removed off the engine, and put out of the way, but still connected,
as disconnecting it, can cause retarded timing.

If a knock sensor ecu is fitted to a no knock sensor engine/loom, best wire in a det sensor at the ecu plug (pins 9 and 10), and fit a sensor out of the way.


S1 85 spec is Blue red Blue.
S2 86 spec is Blue red white. As above, but now with knock sensor and 2nd temp sensor
S2 88 spec is Blue red black. As above but with low octane adjustment and knock threshold adjustment
S2 90 spec is Hearts hash diamonds.




Fuel ecu (black) =

Wiring needs sorting for the TPS , you need to bridge two of the S1 fuel ecu's terminals, as the the S1 ECU expects the TPS to earth through itself, where as on an S2 it is grounded to chassis earth.

S1 = blue code, hasn't got a rev limitor,
S2 = green code, has got one.

 

So what will i need to do. The colours match my ecu except the chipped one is black at the end and mine is blue. Mine has a green sensor disconnected which i believe is the knock sensor but i have nowehere on my manifold to put it so its discon.The car hasnt been messed with,is completely original as previously only 1 owner,my nan.Everything original.

 

The ecu will fit straight on, but needs setting up to the settings of the manufacture of the chip.

Best connect the (green sensor and plug) knock sensor to the loom and tie up near the ecu, and plug the manifold with the correct fitting. (dont need doing).

 

how you mean plug the manifold?

 

Thats the thing, on the manifold there is no sensor, i just have a green plug with nothing in it hanging down.

 

It also comes with a fuel ecu (black one) - would this have a chip in it as well (apparently the chip runs 18psi and by superchips).

 

Block the hole off, using the correct thread plug union, or a spare sensor.


Somethings not standard then.

either someone has already pluged the manifold and removed the sensor, or you have a S1 manifold fitted.




What colour marking is on the stickers on both fuel ECU's?

 

I know the car is standard as it was my nans car from brand new and now ive bought it. Its an early s2 so maybe got a s1 manifold on it.On the inlet manifold on the rhs is the connection to the brake servo (?) and normally below that is where the green plug plugs into(?) BUT on my manifold under the brake servo connection there is nothing. Its cast that way. Id take a pic if i had the car here.

 

Somethings not std,

You have a #

86 RST car,
with a 86 RST (Knock sensor) ign ecu,
and a 86 (Knock sensor) Loom,
But a pre 86 inlet manifold.



Series 1 inlet




Series 2 inlet

 

my car also has the same inlet, definitely S2 as it isnt the 2 piece S1 style, and it looks identical to a normal S2 inlet, except it has no knock sensor, and the inlet doesnt even have a boss cast there, its just non existent

as to what age etc, i couldnt say, as mine is a converted 1.3 pop, but all i know is the inlet is 100% S2, just pre knock sensor.

saying that though, my loom came from the same car, and the loom also has no knock sensor connection, thus why i didnt have an issue leaving it unattached

 

picture of my inlet, sounds to be the same as this guy has on his

 

Thats a pre 86 S2 inlet



But as his has a 86 ECU, either

the ECU and loom have been changed from a pre86 to a 86 setup
OR
the inlet has been changed from a 86 to a pre86 S2 inlet.

 

s1 blue red blue ecu no knock sensor

early s2 came with no knock sensor they ran the blue red white ecu

s2 88 spec came with blue red black ecu and a knock sensor

s2 90 spec came with hearts diamonds hash ecu and a knock sensor and could run slightly more boost than the others as std

 

SO sm - i have a early s2 ecu at the mo. I have a green conenction on my loom but no sensor to plug this into.
From your diagram I have bought a 88spec chipped ecu and fuel ecu to go with it.
Can i just unplug my ecu and plug the chipped ecu in?
Does anyone know if superchips just took the boost cut off or does it adjust fuel as well? And what boost to run at? Im thinking about 15psi.

 

Yes you can just plug it in!!!!!! LOL
Boost cut should be removed yes.
No fuelling is not adjusted, this MUST be done on the RR by a tuner.
Do not turn the boost up without the fuelling being set at the same time or you will go bang!

 

Ok thanks. Just hope the seller on ebay isnt a fraud as having probs receiving the ecus!

 

what year was the s2 made? that is deffo a early s2 inlet manifold, the s1 inlet manifold is 2 peice and that one is clearly not, there are 2 possibilites i can think of as to why u have a non knock sensor inlet manifold and ecu but have a knock sensor connector

1. the original engine has been replaced with a earlier one and the early inlet has been left on and the earlier ecu has been used too

2. the loom has been changed


now if the car is a late 87 early 88 model then more than likely its had a engine and ecu swap

if its a 86/ early 87 car then its likely to of had a new loom for some reason

personally id just buy a knock sensor inlet for £20 fit it with ur new red blue black chipped ecu and hey presto all is good

 

The car has had no new loom OR new engine. It is an early 87 model and is COMPLETELY original!!!
I know the car was stolen a few yrs back but only the ignition and door lock was damaged so cant see the engine loom being replaced just for that.

 

i'm sure Knock sensor setup was brought in late 86.


So your saying your got a

87 car,
86-88 ECU,
S2 inlet with no knocksensor bose,
Loom with a Knock sensor plug

 

sorry but if the car has the knock sensor wiring but no place to plug it then its not original, i cant see ford letting it leave the factory like this, so ethier its had another inlet and ecu or a new loom


put up pics of ur inlet manifold and pics of the sensor connection so we can make sure we are looking at the right things

 

will do but car at welders