Question about Cadillac DeVille

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I have a 1998 cadaliac, i was stopped at a light and the car just shut off, i have fire but no fuel, i thought the fuel pump was bad so i replaced it afterwards i found out i had no juice going to the fuel pump. would someone tell me where to look for the problem? i checked all the fuses and relays all good

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  • Contributor
  • 17 Answers

Have you checked the O2 sensor? Sometimes this is the problem and its an easy and cheap route to take. When the fuel pump was replaced, was the fuel filter also replaced? I would definitely check to make sure

Posted on Jan 01, 2013

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

emissionwiz
  • 75807 Answers

SOURCE: shuts off while driving. no fuel pressure. pcm fuse blows/ fuel pump relay inserted.

Sounds like the fuel pump is shorted.

Posted on Nov 03, 2008

alicantecoli
  • 22133 Answers

SOURCE: 1999 GMC Jimmy won't start.

firstly where is fuel pump relay as i have never seen a GMC jimmy sorry about that but have you ever seen a foden ?? well the first thing is to check the fuse,if fuse is ok which can be checked by looking at it as its transparent or a piece of wire with a light bulb .across the battery.to find the relay is easy if you dont know where it is,When this piece of americana decides to work just turn ignition on and listen for the click of relay ,then when it doesnt start listen for click again or rather an absence of a click,sounds more like a dodgy pump in the tank or the connections going to it.when it wont start try thumping the fuel tank with the ignition on and if it is a sticky pump you might hear it start then at least you will know where the fault is.Another fault that i have come across with relays is that where the relay is passing a heavy load then its possibe for the contacts to burn inside the relay.When this happens then if it is possible to seperate the relay cover and clean the contacts with a points file (remember them ) or a piece of fine emery paper if the cover breaks taking it apart then use a bit of black insulating tape to repair the cover.Thats assuming the pump is in the tank and not bolted to the chassis near the fuel tank but that design with external pump i havent seen on a europeon car for nearly 20yrs .

Posted on Nov 05, 2008

  • 1118 Answers

SOURCE: 1998 GMC Jimmy Fuel Pump Failure?

Your on the right track with the fuel pump test, chanses are its the pump thats went out. its best to have two people one to turn key and one to listen out side of car, the best way to hear if it runs. Now don't be fooled just because you hear the pump it can run and still not put out any pressure, thats ware the test comes in.

Posted on Feb 09, 2009

mlapres
  • 757 Answers

SOURCE: I have a 1997 Pontiac Grand Prix GTP. Recently put

If you replaced the fuel pump then there is a possibility that during the job then some debris from the tank and/or filter got loose somewhere into the fuel system and is in your lines. It could even be a very tiny speck of gasket material, old or new.

Posted on Jun 20, 2009

ifixgm
  • 29 Answers

SOURCE: v6 3800 no supercharged no power to fuel pump cant figure out

HELLO,THE 3.8 SUPERCHARGED (VIN 1 MOTOR) IS UNIQUE IN THAT THERE IS A FUEL PUMP RESISTOR THAT IS NOT CONTAINED IN AND REPAIR MANUAL (I WORK AT A GM DEALER SHIP AND WAS HARD PRESWSED TO FIND IT IN THE BONNEVILLE SVC MANUAL.THE FUEL PUMP RESISTOR IS IN THE PASSENGERS SIDE FRONT CORNED (KIND OF UNDER THE BUMPER AREA) ITS SILVER IN COLOR AND IS ONLY ON THE SUPERCHARGED MODELS.GOOD LUCK RAY.

Posted on Jun 21, 2009

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