"Case in point, my '93
325is with an automatic suddenly issued a "trans program" warning and began
running in default 3rd gear. When I restarted, all was well for a few miles
than the warning would reappear and the transmission would again drop to
3rd. Although the symptoms seemed to be signaling eminent transmission
mechanical failure, my mechanic found that the alternator had failed after
90,000 miles and simply stopped sending power to the transmission control
module. The transmission is programmed to go into survival mode (3rd gear)
whenever electrical power is disrupted."
My question is my 92 325i is in Limp Mode, check a hell of alot of possibilities (Service manual) my last possibility is this,
Belt seem loose,for me there seems too much play.
New Battery (bench tested 12.6v)
New alternator (bench tested) 14.39v
Installed in car, 13.9v (no load)
Installed in car,13.72 (with load)
Sort of noisy the belts at start up,
Now the manual say self tensioning (no adjustment) so in short I have to buy new belts and try again to see if this fixes the problem?
Again your advice greatly appreciated.
PS: No codes till maybe tomorrow
Also MAF is working properly ( the wire glows and there is power)