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740GL won't start 700 1990

posted by  sevorges on  Sun Feb 3 17:12 CST 2013
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last visit: Mon Jan 13 13:44 CST 2014
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My 1990 740GL died shortly after starting when < 20 degrees F. It has a bad cold start valve, so normally will restart fine, not this time. Will turn-over and fire, but die immediately, would not get to idle. I replaced the wires, plugs, cap and rotor (1 fouled plug and burn mark on coil wire), removed and cleaned each fuel injector (though they all operated in test mode 3) ; no change. Tested good spark, and fuel at rail (do not have a gauge to test fuel pressure). Also found PCV hose loose on oil separator. Found cracks in outer insulation of impulse sensor, but tested at 170 ohms (in 50 degree garage). It only has 306,000 miles.....








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740GL won't start 700 1990

posted by  Blindboy on  Tue Feb 5 17:02 CST 2013
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last visit: Tue Oct 21 17:56 CST 2014
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clean all the grounds ,If it regina,,,,esp.the contacts on the base of the base of the coil where it contacts the square body that bolts to the strut tower ,mine started right up after I cleaned them...








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740GL won't start 700 1990

posted by  Milanomike on  Mon Feb 4 11:50 CST 2013
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last visit: Sat Oct 11 22:27 CST 2014
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Is this a Regina car? If so, I'd check fuel pressure, also is your fuel injection relay good? Mike







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