my mates just bought a 2wd saff and hes having a few running problems which he cant seem to resolve, running lumpy and misses slightly, coughing and spluttering, BUT when you unplug the brown plug on the inlet manifold, it runs fine, so he bought a new one and changed it, and a new blue temperature switch, but still the same when plugged in, any ideas

 

could be map sensor or tps try the tps first

 

Could also be the wiring/plug.....

 

one of my mates had the exact same problem..

It was unplugged for months before he noticed.

its the air temp sensor i think?

 

euan did he find out what the problem was?