So, I took the SPi to the local dyno day to see what power it's putting out. I got a good laugh.

37hp @ the wheels

1.3SPi with K&N Filter mod and a 'sports cam'.

My 'not so stock' 1098 put out over 45, so this is a little disappointing.

Air / Fuel ratio sat at a fairly constant 14......way too lean apparently.

What might be playing up to cause such an abnormally lean mixture ?

The car feels fine to drive, I have absolutely no problems with it on the road. The power it has when driving feels great, so it makes me wonder how it would go with the right air/fuel ratio.

what cam are you using? the only 'sports' cam the SPi Ecu can cope with is the kent 'efi' cam. Anything else requires an aftermarket ecu.

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Noli Illegitimi Carborundum

Whatever cam it was that Brickworx put in.

Words used were 'Sports cam', other than that I don't have anymore info on it.

Do you have an air temperature and speed sensor connected to the aftermarket filter?
If not, the engine may be defaulting them to a value (eg set by a hot English or Japanese day of 10 degrees C) and putting in the extra fuel.

Put the stock airbaox and filter in, and put the car on the dyno again after 100 kms use, and see what it's like then.

Yeah, all sensors are hooked up and plugged in correctly.

if the ecu was putting extra fuel in it would be running rich, not lean. Good point though, are all the leads plugged in?

If brickworx put the cam in it will be the kent, steve was the one who told me that it was the only cam that will work

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Noli Illegitimi Carborundum

Ah, goodstuff.

It has me stumped, the only thing I can think it would be is the oxygen sensor. But, I have no way of testing this.

Plugs are new(ish) and leads are fairly new.

do you have access to a co2 sensor? if so set it up and detach your various sensors on at a time, if any make no difference you have a suspect

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Noli Illegitimi Carborundum

Have you got any vacuum leaks from three plastic hoses that is common on a SPI as that will make it run lean.
Also what does your temp gauge sit on?
Cheers Pete

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A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

I replaced those two small hoses, as the elbows split. It now has generic vacuum hose.

Would the diameter of that hose have any effect ?

Temp gauge sits just below that white line in between H and C.

O2 sensors have a life of under 100,000km, but no-one ever changes them.... so many cars on the road could be running better than they are

they're pretty cheap, go buy a new one (bosch)

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did I tell you that I won a trophy?

diameter of the hose means f all

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Noli Illegitimi Carborundum

you don't know the part number of the O2 sensor do you Simon? I should replace mine as well

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Noli Illegitimi Carborundum

nah, no idea - if I got my sh!t together and went and collected the front cut I need to pull apart for a guy I'd be able to tell you, but crawl under your mini and take it out, the part number will be stamped on it. They're a common item, just depends on the number of wires (2, 3 or 4)

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did I tell you that I won a trophy?

Oxygen Sensor part numbers

These are part numbers for the exact same sensor.

ROVER
258003193
MHK10004
MHK10004L
OZA527E8

PROBE
MHK10004L
MHK10004
OZA527E8
OZA527E8
MHK10004L
258003193

NTK
258003193
MHK10004
MHK10004L
OZA527E8

LAND ROVER
258003193
MHK10004
MHK10004L
OZA527E8

BOSCH
258003193
MHK10004
MHK10004L
OZA527E8
0258003193
0MHK10004
0MHK10004L
0OZA527E8

I cant find any prices listed, and I can only find them listed on one aussie website.