Thanks for the reply
I was told it was MAF (Mass Air Flow) which measures how much air to draw into the filter? I'm no expert so I don't know?
I'm in St. Helens (North-west)
Ta. Andy.
There is no MAF sensor on these engines
The method of air measurement is Speed density, this uses a combination of coolant temp, air temp and manifold absolute pressure (MAP) and engine speed. If the guy that was using the diagnostic said there was nothing wrong, he is not doing his job very well, i would go somewhere else. Its not the code reader that fault finds the engine, its the person using it. Bottom line is if its missfiring and the mechanic says there is nothing wrong because the code reader said so, then he doesnt know what he is doing in the first place, Take it somehwere else.
Sensors do not have to completely fail to cause major problems, if the temp sensors are reading several degrees out, especialy the coolant temp sensor, it gives the ECU the wrong idea of what the engine is actualy doing. These sensors need chaecking against a calibrated digital thermometer and the diagnostic readings, that is the point of the diagnostic, its a tool, not a magical box that tells you what to fix.
It would help to know what colour the plugs are after a run out in the car, thus telling us if its a rich missfire or a lean missfire.
Camco 88 in warrington is a Network500 agent, they should be able to sort you out with the diagnostics.
http://www.atpelectronics.co.uk/