Ok, another MOT another bodge pass for the emissions. High Lambda and CO at 3k revs, HC ok at 3k revs. I'm thinking next step is go for an original lambda sensor, but cheaper option first would be blank off EGR valve. Trouble is I don't have an emissions tester I can plug in and work away at the car trying different things without paying a garage and a mechanic to do it.
Wow gas testers have gone expensive...
Well not really - I bought a Gunsons Gas Tester 2 professional in about 1990 for £80.
Just looking now, the cheapest I can find start at £99 for a standard model.
There are a few used Gas-Tester 2s for sale on ebay... currently about £50 each.