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Volvo in Distress: 1993 940 Non-Turbo Bosch FI

posted by  onlyVolvo on  Mon Mar 13 20:22 CST 2017
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last visit: Thu Jun 26 20:57 CST 2014
[RELATED]

Original description of problem:

My 1993 Volvo 940 has been running smoothly however, most recently and suddenly, while going at 30 mph (@ approx, 2000 RPM), I stepped on the gas and the power and RPM dropped... No power for about 2-3 seconds. Just as suddenly, the power came back and the engine ran smoothly. This happened a few times on the way home from work. When I was stopped in traffic, it stalled once but I was able to immediately start the engine which ran smoothly...

Action taken:

(1) Replaced the fuel pump relay with new one

(2) Installed new Bosch Main fuel pump and fuel filter

(3) Checked all visible wiring and fuses. All O.K.

The problem has persisted. Today the car stalled twice while stopped in traffic but immediately started and ran smoothly.

I welcome any suggestions as this intermittent issue is a difficult one to diagnose.

Thanks in advance to all!

OnlyVolvo



Thanks,

OnlyVolvo






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