I have a '95 STI much modified and engine error light glows constantly. Will not pull more than 0.5bar boost before cutting fuel and standing on its nose!
I am tying to get error codes but it will not produce any.
After connecting 2 black wires and turning on ignition the fuel pump and injector relays pulse pouring fuel into the engine and thats it - No codes on engine light.
Car has been checked by 2 garages and they cannot produce codes either.
Do the main dealers have a different method of retrieving the codes?
The car has an after market air filter and there are 3 plugs hanging loose by this. They presumably connected to the original filter? Prevous owner said that engine light has shown since the filter fitted but car ran well.
Any help appreciated!
Tony

 

Garages usually usea select monitor to show faults.

3 wires hanging loose after fitting a filter? Should be no wires hanging loose even after loosing the airbox.
Could be that they've removed the MAF?

 

Thanks for that. I'll let you know how I get on.

 

could be in limp home mode, caused by a faulty maf, try getting a loan of one and try. don't forget to reset

 

Think if I were you I would be trying to get hold of a standard airbox setup, fitting that with all plugs correctly connected and see what happens. Sounds like the most likely cause of the problem from what you've said.

 

sounds like your maf isn't connected.. i wouldn't run it like that if it was me. I have a hks induction kit and maf on ebay at the moment.. If you need it let me know and i'll pull it off for you.. or you could bid lol!!

 

Might sound silly but does the engine check light show at all (removed bulb)?