Fixing the fuelrail...

Mounted the reducing adapters to the fuelrail.

On the left side I will use a rubberhose since it will be connected to the Malpassi fuel pressure regulator. The Banjo coupling is taken from my spare motor, think it was connected to the auto trans.

The right side uses an adpter from my spare fuel distributer which allows me to use the original incoming fuel line.

This is what's been bothering me most... Since i bought a fuel rail with a to big inner diameter(AN8 thread) I couldn't use the small banjo couplings directly in the fuelrail, instead I had to put a reducer between the banjo and fuelrail. But it did work, about 1mm between the motor and banjo head...  

 

A litte bit cleaner...

Cleaned as much as I could and removed all unnecassery vaccum lines. Checked if the fuelrail fitted amoung all brackets and linkage. Looks very nice and clean I think...

The only thing thats been a problem so far is the "fuel line connection" on the left side on the fuelrail, it's a little bit narrow between the fuelrail and the aluminium corner (engine top), hopefully the banjo-coupling will fit after I grinded down the reducing adapter little.

 

So it begun...

I finally got some time to start my fuel system swap. I replaced the ignition a couple of months ago and have been very satisfied with the result, lower fuel consumption and the car has feld a little more responsive. 

I really hope the change of an old (but still functional) mechanical fuel system to a modern electronic one will make a difference in the engines behaviour. Time will tell...

Air cleaner removed...

Fuel system removed.

I've started to remove the fuel distributer without disconnecting any fuel-lines. When I removed the brackets holding every pair of injectors in place, the injectors almost popped out themself. At a closer look it seems like the Oring seals are warn out, very hard and deformed and most likely it has drawn some air this way. I manage to disconnect everything without any problem so I will start to clean and maby paint as much as I can while I can reach some of the parts.

Removed almost everything in one piece...

A deformed sealing...

 

New Oxygen sensor in place.

Managed to remove the old oxygen sensor without any trouble and mounted the new one in it's place.

The funny thing is that the AFR (air/fuel ratio) value when mesuring on the exhaust gas is perfect.

About AFR 10 at cold start which indicates a rich fuel mixture.
AFR 13.5 when accelerating, which is good(richer mixture).
AFR 15-15,5 when cruising (lean mixture).

Must say that my K-Jet performs really well under the circumstances, had expected much richer mixture overall. Bosch new what they did when they build it. Could be my narrowband oxygen sensor controlling the Frequency Valve that keeps the mixture so perfect and the fact that my K-Jet are in a very good shape.

Connected the sensor to the gauge which I have put where the center ventilation outlet is.

Connected output 1 to my MS system and output2 (simulates a narrowband sensor) to the old original controll-unit.

Original Oxygen sensor ECY which controls Frequency valve

It seems like the old "lambda controll box" works with the simulated signal since it regulates the "Frequency valve" mounted on the K-Jets fuel distributer as it should.

Yellow connection on Frequncy valve

As seen in the movie when idling it tries to stay around 14.7 but since a narrowband only detects to rich or to lean it's a kind of on/off regulation but it explaines why the AFR values while driving was as good as it was..

Oxygen (Lambda) sensor removed and new one soon in place

To be able to use "close loop"and optimize the fuel injected into the engine, the Megaquirt FI system needs a wideband oxygen sensor to be used to give feedback to the MS ECU about the amount of CO in the exhaust gas.

I bought a sensor from Innovate which also has a gauge showing either the Lambda or the AFR (air/fuel ratio)-value which I'm planning to mount in the center ventilation output on the car.

The gauge has 2 analog outputs where the second output can simulate a narrowband sensor like the one I removed, I will try to connect it to the original Lambda sensor control and see if it works before I do anything else. Could be fun to see how well the K-Jet system perfoms.

Innovate MTX

Since my car alredy had a narrowband oxygen sensor controlling a "frequency-valve" which helped the WUR to adjust the control pressure in the K-Jet fuel distributer,  I can put the new sensor where the old one where mounted.

Rich mixture = High CO = Low Oxygen
Weak mixture = Low CO = High Oxygen

This is how the old one looks likes beside the new one...