Join Date: Dec 2008
Location: Yes it is a 2+2 TT
Re: Sudden and profound blowing of black smoke and 5 mpg
It's the ECU or wiring TO the ECU.... I haven't found an post which directly parrots your problem... but if the car RUNS, it's smart enough to go to limp home mode.. which means it's not totally brain dead... but it has a sever concussion... I would hate to have you buy a new( er ) ECU and have the same issue... so try the voltage test(s) when you have time.. that might tell a story... if everything looks good, then sub ECU's.. If I had to bet the farm.. I would bet ECU ( so if that doesn't fix the issue you have a spare.. and spare's are GOOD, if you got a good spare ).
Opening the ECU & inspecting= no cost
Measuring edge connections & cleaning= no cost
And will give you good pointers...
The other option is if you have an older laptop, you can get freeware versions of ECU talk or Conzult... ( you will need the test adaptor & cables ) ..
and MAYBE the ECU is still talking...
So that's my thinking.
91 2+2 5 spd TT conversion.... boost controller.. so far.
90 2+2 Auto N/A ( the car the kid stole! ) SOLD