Hello folks and Happy New Year,
My Dad has purchased a 93 exact same as mine and same year except it's a sport wagon. He's having a problem with it going into limp home mode frequently and no codes showing and I think I know what the problem is. Today is the first day I've seen the car and on starting I noticed an additional whine at idle which mine doesn't have and the note of the whine changes with the engine speed when you rev the engine. I had a quick poke about the engine bay at lunchtime today and i noticed I could feel air escaping in an upward direction from the front drivers side of the car, in front of the air filter box. I'm thinking he has a vacuum leak. When the car is idling it's not always there, its maybe only every minute or so that you feel it for about 20 seconds or so. I'm thinking this is due to pressure building to a point it can escape from wherever the leak is.
It's quite crammed in that area to investigate properly, so I was wondering if there was a diagram somewhere for the TTiD engine I could look at and try get an idea where it might be coming from. I'm no mechanic so I a diagram which explains what systems the different hoses belong to would be helpful.
Many thanks if anyone can help.