Car has been running fine for a while with no issues etc (
'53 156 2.0 JTS Veloce
However, I was driving into work today and after slowing for a changing traffic light, as I accelerated again the Motor control warning beeped and flashed up and the car jumped into limp mode. Max of about 4k revs. I managed to get into work though as only around the corner.
Mid morning I went out to try the car again and the warning is still there but the limp mode was initially gone. After about 3 mins driving it activated again and I was back to limp mode.
I pulled over and decided to see if the MAF was the issue and so turned off the car and unplugged the MAF using the connector just above the air box. I started the car and obviously it bleeped MCF as expected but the car would barely move.I could not move more than about 2 mph and was all bogged down. Reconnected the MAF and after an initial clearing of the throat the car moved off again with no limp mode activating again over the rest of the short test drive.
So.... does anyone have any ideas on what could cause that? I thought if the maf was unplugged, the engine should just use default values but still allow you to drive away OK.
I have read a lot about the useless multipin connector at the back of the engine. Which one is the troublemaker? (Clour/position?).
The car is going into SGT Alfa at 2pm for a diag but I know the loose connector can lead them to change all sorts of things like throttle positions sensors and pedal boxes when that is not the actual issue? Anything else DIY I can try in the meantime?