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Troubleshooting a dead fuel pump S70 1998

posted by  B.B. on  Sat Oct 7 05:04 CST 2017
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

There are two relays that can kill the fuel pump.
one is in the lower level of the main fuse block, the other is
above the radiator.

You can listen for the pump when you first turn on the ignition, it will
make some noise for several seconds. If you hear the noise, then the relays
are working. The fuel pump noise does NOT mean that the pump is pumping!

Then you simply go to the fuel injection rail on top of the engine and look for a Schraeder valve. It's the same style valve as in your tires.
Take the cap off and press the center valve pin being careful to hold a rag so you don't get gas on you. There's about 80 PSI with a healthy fuel pump.
If no gas comes out then the fuel pump has probably failed.

Don't forget there's an in-line gas filter too.

Bill





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