Question about 1998 Cadillac Seville

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1998 cadillac seville fuel pump wont run....fuel pump relay is not the issue. A snap on scanner indicates I have a ground to earth issue./...how do I rectify this?

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  • 246 Answers

Need wiring diagrams and lots of patience electric issues are not a easy thing diagnose so you r best bet is to have some one do it or get what I suggested and good luck.

Posted on Oct 14, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1996 CADILLAC DEVILLE, NO POWER TO FUEL PUMP

Check for a burned fusible link under the hood. If you have power at the fuel pump relay, you could have a bad ignition switch or bad oil pressure switch...accordianman

Posted on Dec 15, 2008

  • 41 Answers

SOURCE: replace power steering pump and lines 1992 cadillac seville sts

you need to have a pulley puller to get the pulley off if you don't have one most auto zone part stores have a loan a tool program and they can help you with that on most powersteering pumps the high pressure line will be a fitting or bolt on and the return line is usually just a squeeze clamp hope this helps good luck

Posted on Jan 30, 2009

Kravcar
  • 192 Answers

SOURCE: i have 1998 cadillac seville w/northstar motor

The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.

Posted on Feb 25, 2010

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1 Answer

Where is a wiring schematic for a 2003 Cadillac Seville be found?For fuel l pump relay?


https://s18.postimg.org/6rlghkfqh/fuel_pump.jpg

Click on the link.
The load side of relay is that line with arrowhead. When the relay is energized that line moves to other terminal. You can see the fuse for load side of relay.
The right side of relay is the control side, has to have voltage and ground. The ground is chassis ground, the voltage should come from pcm.
Now, if you have problem with more than one system, like, no spark--fuel or fuel injector pulse. I look for a rpm signal. I don't know if trouble codes will help, but, I'd check applicable codes, anyway.

Apr 24, 2017 | Cadillac Seville Cars & Trucks

2 Answers

Could I run a electric fuel pump on my 1998 Cadillac deville?


if it did not have an electric fuel before then the installation of an electric pump is a relatively easy process. If you have an electric pump already fitted but it has failed then remove it and install the new pump in its place. Take care to check all wires, fuses and relays and any pressure sensors for correct operation. Remove and blank of the opening for any mechanical pump on the engine
For new installation select an easily accessible place under the vehicle that can be protected from flying rocks and road debris. Run a power wire (red colour) from the run side of the ignition switch to the relay ( to be fitted ) near the battery or in the engine bay. Run this wire through an inline fuse close to the ignition switch to protect the circuit. attach to a coil actuation terminal of the relay.( look at the base of the relay for terminal identification. Run a black wire from the other side of the coil actuation pin on the relay to earth. Normally the same bolt that mounts the relay. Run a red wire capable of carrying 20 amps directly from the battery terminal through an inline fuse ( close to the terminal) to a power pin on the relay. Run another red wire from the outlet power pin on the relay to the electric pump. . Run an earth wire from the pump to earth.
This is a basic electric circuit for the installation of the pump. If there is a requirement for a pressure regulator or pressure sensor to control the pressure or pump operation , that control wire will be connected in series into the wire from the ignition switch so that when the pressure is reached then it breaks the circuit to the relay from the ign. switch and the pump will stop operation until the circuit is again completed. When the ignition switch is off there will be no power for the pump

Oct 09, 2014 | 1998 Cadillac DeVille

1 Answer

Where is the relay for fuel pump on 1998 seville


Im pretty sure the fuel pump relay is located under the rear seat in the power distrubustion center near the battery

May 08, 2014 | 1998 Cadillac Seville

1 Answer

No power to fuel pump unless i ground the relay


This would be an indication that there is another grounding issue you have not found. You have to find out how the fuel pump is grounded and trace it from there.

Sep 28, 2012 | 1998 Dodge Dakota

1 Answer

1998 sts i changed the fuel pump but still not getting fuel


REPLACE FUEL FILTER AND CHECK FUEL PUMP FUSE AND RELAY.

Jul 09, 2011 | 1998 Cadillac Seville

2 Answers

Installed new fuel pump and fuel filter in 1998


MAKE SURE YOU DID REPLACE FUEL PUMP WITH NEW SOCK.THE OLD PUMP SOCK IN THE TANK STOPPED UP.CHECK FUEL PUMP FUSE AND RELAY.

Mar 25, 2011 | 1998 Cadillac Seville

1 Answer

My 1998 cadillac seville was running fine and just stopped. Now it wont start it is getting 10 psi fuel . the injectors are pulsing. we get spark . and we checked the timing ang it seams to be holding...


So you have used the Noid lights to see if the computer is pulsing the Injectors, and you have GOOD Kv on the spartk minimum 25-30 Kv's?

Also it might get gas but how much gas? you need to perform a volume test there is a certain amount of fuel the car needs her minute to sustain demand load variations.

Is it port injection or thortle body? What engine is ? if its port injection your fuel pressure is to low , if its a throtle boty i think 15-18 is minimum to keep the car running, might have a bypassing fuel pump in the tank.

Need more info.

Aug 24, 2010 | 1989 Cadillac Seville

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