Originally Posted by
tabetha
The actuator plumbing is looking for trouble, there's nothing wrong with the std amal valve.
The addition of hunting tells me it is the CO, it is running very lean by the sounds of it, richen it up to around 2.5 % CO, obviously this needs doing on a gas anylyser, but if it is a car that you don't know the true history of I would suggest that first you replace the coolant temp sensor, this is at the rear of the head on nearside(inlet), a blue sensor with a two pin plug on it, this ensures the fuel mix is correct at the correct temp and is the main corrective factor for fuel mixture.
Just a simple turn of a screw afterwards on the ecu will have it nice and happy!!
tabetha
Sounds plausable. It was running a uprated chip, but has had a standard one put back in. Looking at the MOT emissions test, its showing a CO % at idle of 0.13. Im assuming this is very lean??
I have ordered a full sensor kit from MSD so will swap the whole lot next week. I dont have a gas analyser

How many turns would see me safe enough to drive it to somewhere to have it setup properly??
thanks