Emissions Ok

[gncgray]

I tested the emissions weekend and they are about 1.5-1.4 so well pleased with that. Just hope they read the same at the test centre.

 

 

 

Graham

[knights_templar]

which test are you going for?

and 1.5-1.4 what?

[Guest MarkB]

That's got to be co's, but what were the hydrocarbons like? Oxygen level?

[knights_templar]

That's got to be co's, but what were the hydrocarbons like? Oxygen level?

 

if it's CO it's to high to pass on a Zetec

[gncgray]

Bugger, thought the max was 4.5. stupid question but whats the best was to lower them...change the fuel/air mixer?

[Grim]

you need to tell us a little more info: carbs or efi (and what type)? pre or post-IVA? pre or post 94 engine? Q plate/age related/new reg?

[gncgray]

Sorry, pre IVA running standard injectors. Its a 1999 engine

[Grim]

in which case, your CO limit is 0.5%. Assuming you're running an aftermarket efi system, you'll need to lean it out a little for idle emissions.

[knights_templar]

in which case, your CO limit is 0.5%. Assuming you're running an aftermarket efi system, you'll need to lean it out a little for idle emissions.

 

if its 1999

 

Tick-over

CO < 0.30

HC < 200

 

2500 – 3000 RPM

CO < 0.20

HC < 200

Lambda 0.997 – 1.030

 

from the manual

 

https://dl.dropbox.com/u/11598108/IVA%20Emmision%20test%201.pdf

https://dl.dropbox.com/u/11598108/IVA%20Emmision%20test%202.pdf

[Grim]

oh, as low as that!

[gncgray]

Oh indeed, thanks guys.

 

Would I change the fuel/air ratio?

[knights_templar]

Oh indeed, thanks guys.

 

Would I change the fuel/air ratio?

 

getting lower CO will change fuel/air ratio, you can run it very lean at tick-over (test ONLY), but too lean at fast idle will put lambda to high.

 

sorry if I have missed it, is it on injection or carbs?

[gncgray]

Injection running Megasquirt ECU

[knights_templar]

Injection running Megasquirt ECU

 

you mentioned you have tested the emissions. what kit do you have to do that? because it should be just a matter of tweaking the map to get to the required target.

[gncgray]

I used a Gunsons emissions tester. The car has been on a rolling road and set up so I dont want to mess about with that map. Can I "copy & paste" that map and re do the fueling to get past the iva?