D2 V8 CO Emissions fail

kurgan · Jan 6, 2020

Guys, HELP!!
My new 98 D2 V8 (spent 10 months on a driveway before I got it) is in for MOT but can't get it to pass the (2500RPM) high idle CO emissions level. Pushes out a bit of blue smoke but it goes away.
Passes emissions at normal idle. Temps are in normal range, doesn't seem to use/leak water or oil.
New Bosch lambda sensors fitted.
Any ideas? Want to get it road legal asap.

Ratae · Jan 7, 2020

Can you post the readings?

kurgan · Jan 7, 2020

Ratae said:
Can you post the readings?

I'll have to ask the garage as they haven't supplied them to me.

JUKE179r · Jan 7, 2020

I'm trying to think of cheap and easy results.
how old is the air filter and spark plugs?

Shippers · Jan 7, 2020

Welcome...ask over in the dicovery section might get more views there...

Henry_b · Jan 7, 2020

My V8 had bad emissions throughout its mot history, its habit of being a town car also showed it rarely broke 2500rpm.
So in a fit of temper i took it the long way to the MOT station which involved a dual carriage way, i took it up to 60 in 2nd and held it there

maxed it out in all lower gears, when i got to the station the Manifolds were glowing red hot

It passed with the cleanest emissions it ever had

I'd throw some redex in if i was gonna do it again

JUKE179r · Jan 7, 2020

Seafoam it!

D2 V8 CO Emissions fail

kurgan

Active Member

Ratae

Well-Known Member

kurgan

Active Member

JUKE179r

Well-Known Member

Shippers

Well-Known Member

Henry_b

Think outside, no box required.

JUKE179r

Well-Known Member

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