SOURCE: While driving at highway speeds
Had a similar problem with 88 SAAB 9000 some years ago. All above solutions were suggested by various people and machanics tried everything, but problem persisted intermitently anyhow, till machanic from AA (rescue) suggested it was an electronic ingition related unit that sits snug against the body inside the engine compartment. When this little item was replaced (it's about 2 inches square and is very simple and relative inexpensive to replace) problem was solved forever.
John.
SOURCE: Mercury Topaz loses power while driving, and stalls out
Check fuel pressure. Sounds like a bad pump or plugged fuel filter.
SOURCE: i have a saab 9000 cde 1994 it drives nice but
Make sure all your injector connectors are clean and not corroded. make sure you have the correct resistor sparkplugs. And if both of those things are okay you probably have a bad direct ignition cassette.
SOURCE: Car stumbles,hesitates,loses power on Hwy, randomly
Did you check earth connection of electric system?
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