Is my car running too lean

[Fazza6868]

Firstly I will give you the spec
PUG 205 alloy block mi16 on jenvey throttle bodies with ermerald management FSE power boost valve, stainless exhaust , tbular manifold (not sure if standard although has got re-angling plate). I bought the car in its current form therefore do not know much about how its all set up .

The car passed its MOT on friday with flying colours I have been driving it over the weekend and all is good.

When the emmissions test was done with for the mot the results were as follows

CO 0.64 Limit <3.50
HC 34 limit <1200

I was showing the results to a good friend of mine who suggested it was running very lean i have noticed although the car is very quick the power does seem a bit lathergic in its delivery . the exhaust is alos leaking a bit too i think between manifold and centre section but could possible be at the manifold what effect would this have?
one other thing to mention the car was peviously fitted with Nitrous which had the jets fitted to the itb trumpets i have removed the jets now but havent managed to replace the trumpets so they all have a 12mm hole in them will this have an effect on performace also.

all help is greatly appreciated.

Thanks


Paul

[TheEnd]

The MOT test results are at idle, or fast idle, so they won't show you a lot. What'd you'd need is a wideband lambda to check to see what's coming out under load at more useful rpms.

[Fazza6868]

so you dont think it will be a problem then, some have said that its a good thing and others have said it is too lean, I will try and get it on the rollers soon at which point they will be able to diagnose problems (if any) .

[TheEnd]

Yea, if you get it on a rolling road, you'll see it all. You'll be looking for a steady AFR of about 12.5 on full throttle.