Check the O2/Lambda sensor either with a computer or a voltmeter.
If it's a phase one TS you only have one just before the cat.
It's easy to check with a digital voltmeter. Look for "how to check lamda" on Youtube.
The lambda plug is on the engine bay bulkhead under the black plastic relay cover.
One screw to get the cover off. There's a four pin plug , I seem to remember it's the two pins on the left for signal (offside).
You need to get at the two left pins while the plug is connected.
So.. Undo plug.. trap some thin fuse wire in there so it's hanging out .. reconnect plug.. you now have something to connect the digi voltmeter to.
At 3000 RPM It should swing from 0.1V to about 0.9 volts about twice a second .
If it don't, then the lamba's knackered.
If the Lamda is knackered and its been running rich it can take your cat out .. Soot..
Also check for manifold and front pipe leaks. if air is getting in it will screw up the lambda.. (it thinks the cars running lean and tries to richen it up)
If the lamda has never been changed it will be well past it's sell by date by now.
Check it first though. costs nothing.
To check your cat you need a thermometer that reads high.
The temperature at the inlet flange weld should be 100 degrees lower than the temperature at the outlet flange weld when fully warmed up . If the outlet is cooler than, or same as the inlet your cat's not sparking up.
Gettin' to old for this sh*t
Last edited by seadart; 16-12-14 at 00:27.