Intermittent stalling in 89 760T. The owner of the shop hinted that late 80s and early 90s 760s have had problems with their computer chips Has anyone heard of this?
[Response 1:] Yes, very much so…LH 2.4 modules from 1989-1991, maybe 1992 too, have been very troublesome. However, as far as I know, 1989 Turbos still used LH2.2 modules, so I’m not sure that this applies to your car. Also, often when the modules fail, they fail rather radically, such as the car running very rich, or a no-start or cases like that.[Response 2:] I experienced almost identical symptoms for several years. They went away when the ECU on my 760 Turbo had to be replaced because the AC enrichment circuit went south.Marginal Operation. When mine died it got stuck in diagnostic mode 3, pulsing the injectors every second, which was enough fuel to start the car but not much more. Other cases I’ve heard of has the adaptive rich code getting set permanently.[Yet Another Opinion:] As a general rule, ECU’s don’t go half bad, and don’t work intermittently: they work fine or they don’t work at all. It is wires and connectors that have off days.[JKordzi]The 561 ECUs have had very high
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