St170 rwd oem fuel injection on a budget project.

I thought I would post up some info on a little project I've been playing with. It may be of interest to some.
An St170 engine turned 90 deg for rwd and run using its own ecu.

Most people have told me what's the point. Well because I can is as good a reason as any.
Aftermarket ecu's to run the vvt are around a grand for something like a Dta s60. Then there is the mapping and I haven't seen anyone map the vvt as well as Ford its just to complex to do in a couple of hours on a dyno.
Most delete the vvt and go with a cheaper ecu but you wont do it as cheap as this and get the same level of emissions imho. A dta s40 is around £600 plus mapping. My ecu is an ebay special and there is a breaker that knocks them out for £20 each with no mapping needed.

The st engine management is more complex than a standard zetec.

It has
vvt
Dsi
returnless fuel pump

I start by buying the said ebay special.
1hr's Work. Can I turn the immobilizer on and off.....AnswerYES

http://www.youtube.com/watch?v=4UMyy6HXvQ4&feature=share&list=UUkDKrAHv1l NC5W0RspCbkIA

So I buy the wiring looms from the same guy, all nice and cheap. I now have lots and lots of work to do. The real work has started on stripping the loom to reduce it.




There are four looms in the engine bay. The main car loom and three for the engine. Its these three I’ve started on. There is only two on the <2000 Mondeo and other than a couple of extra plugs that’s all you need.So I’ve stripped back the three sub looms.



I am now tracing back from the ecu the (104 pins)



Ive done a marathon session on the wiring loom. I "think" I have traced back and worked out the colour and function of every pin on the st170 ecu loom.

Now starts the work of choping the loom up and removing the bits I dont want and rebuilding the loom to fit my kitcar. I am finding twice as many functions as the Mondeo means twice as much work.

If any one is thinking of having ago ? then the only plug you need from the car loom with the fuse box is the plug for the Imrc.
On the gearbox loom you want the pre o2 sensor plug and the cps plug. On the dash board loom that I didn't get there is the transceiver plug and the obd2 port. I just robbed these two from a mk3 Mondeo.

The finished wiring loom.


Ive now bought an engine to play with.



Engine stripped of extras.



The plan was to put it in rwd kitcar so I started chopping the sump

















There was no flywheel on the engine when I got it but Iwould have dumped it as it’s a dual mass. On goes a solid 220mm flywheel with a new clutch and a spigot bearing to suite a T9 or Mt75box.

I drew around the bellhousing and cut a dust cover from 1.5mm steel to go between the engine and the bellhousing.







For a 7 I wanted a smaller alternator so a trip to the scrapie returned a nice little denso unit. So work started on the custom mounts and idler set up.



Belt fitted, cost me more than the alternator…..grrr



So I now need to bolt the engine to something to run it up.Time to butcher that naff mechanics creeper stood in the corner lol. More bits are obtained and the engine plumbed.





I need to mount the electrics to something so yet more scrapfinding a new home.



All that’s left is the exhaust. The st170 manifold wont fit now due to the sump mods so I cut it up and modified it to suite a locost.



Time for testing…

The ignition panel has a toggle switch as the ignition on.Its illuminated to show power. The red lamp is for the alternator charge lightand the back light on the starter button is for the low oil pressure warninglight.

So turn the power on and the Pats indicator stops flashing and stays on solid for a couple of seconds before going out. The immobilizer is happy and disarmed. The engine can now be started.

A quick press of the button and she fires into life. The oil pressure light and alternator charge light go out.

The idle is a little high but settles down to an expected 880 ish rpm. Note the engine isn't keen on no air filter.


So its been running now for around 3/4 of an hour and is running great. Fan is cutting in at 101 deg and off again at 95 deg. Its gone through a couple of litres of unleaded and is still showing no Cel codes. Its happy running with out the dash.

You Tube

Jobs to do.

Get some more petrol and run it for longer.

Buy some proper sealant for the sump.

Dress the engine.

And last of all find a new home for it.