Jump to content
CaddyInfo Cadillac Forum

97 Seville wont start


larman

Recommended Posts

Hello,

Started car went about a 1/2 mile it just stopped. Car turns over but it will not start. We just bought this car a few weeks ago. Message display has said service fuel system since we bought it, previous owner says it has been like that for a while. Other than a few times of hard starting and running a little rough at start it has been ok. Any ideas where to start to looking?

Link to comment
Share on other sites


...same symptoms with my '98 a while back. Turned out to need a new fuel pump. Not a big deal...except that the gas tank has to be pulled to replace the "fuel pump module."

Shop time was as costly as the part -- which ran about three hundred plus. But not a problem since, so..... My mechanic says that until '95, you could replace the pump

itself, but subsequent models have a "fuel pump module" which is a bit more complex...but it includes all the filters and such. Worth doing if you plan to keep the car

for a while...and why not? Good ride.

Edited by voicepro
Link to comment
Share on other sites

If you're getting a code and a message, it may be the fuel pump relay, an $8 part. The most common fuel pump relay code is P0231, although a bad fuel pump relay can throw P0230 through P0233.

The relay is one of two on the fuse block in the underhood fuse block.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

Link to comment
Share on other sites

Diagnosis the problem dont throw parts at the problem. First, install a fuel pressure regulator for the rough start up when cold. Maybe check and see if you have power at the pump when you cycle the key on.

Link to comment
Share on other sites

Is the relay the same as the ac relay...can I just switch to see if that does the trick? I hear something pumping / turning on about 30 second after I turn the key. Is that the fuel pump? I don't have a pressure gauge maybe I can rent one.

Link to comment
Share on other sites

its a little micro relay so you can swap it out. To test for fuel pressure, cycle the key on and find the test port under the dress cover. remove the test cap and stick a pocket screw driver in there to depress the valve and it should spray out pretty good.

Edited by barczy01
Link to comment
Share on other sites

I pulled the coil wires and I am getting spark across the terminals on all 4 of the coils. I guess that eliminates the spark issue. I hear something pumping foul that be the ride suspension?

Link to comment
Share on other sites

the fuel pump kicks on for 3 seconds as soon as you turn the key on.

About 20 seconds later the air ride compressor kicks on and levels the car. I think this is what you are hearing.

Try swapping the relay and see if it helps, but likely your fuel pump is bad. I believe the code is set by seeing excessive resistance in the circuit. It has been giving warnings to try to tell you something is not working properly. At least our cadillacs tell us rather than just crapping out.

I would not change the fuel pressure regulator at this time. The hard start could have been caused by the fuel pump problem.

Also I dont think the relay is the culprit because There should be a failsafe. If the relay fails the fuel pump should still turn on once the oil pressure sender senses adequete pressure. My relay went bad a few times in my oldsmobile and I would know it because it would not enable the fuel pump til it sensed oil pressure.

Either way it is worth it to swap it out. Best of luck to you

GM FAN FOREVER

Nice, clean, luxury= fine automobile

Link to comment
Share on other sites

you dont need a code reader. also code reader will not tell you that your fuel pump is bad. Look up onboard diagnostics on this forum and it is very easy.

turn key on

look at your climate control

Hold down the off button and the passenger warmer button for 3 seconds, the dash will go into a lamp test mode and then it will display codes by system in the IPC bottom center.

GM FAN FOREVER

Nice, clean, luxury= fine automobile

Link to comment
Share on other sites

Connect a fuel pressure gage to the fitting on the fuel rail and turn the key to the ON position. The fuel pressure should be greater than 42 psi. I would recommend you do this simple diagnostic step before replacing the fuel pump...

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

Link to comment
Share on other sites

Since there is a DIC message, there *is* a DTC code. If we see the DTC code, we will likely have the diagnosis.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

Link to comment
Share on other sites

Like I said before. I believe the message is triggered if excessive resistance is shown in the circuit for the fuel pump, whether it be burnt harness(common) or pump itself. You may find that the harness is burnt to the pump, that may be the actual problem, but regardless I would replace the pump assembly

GM FAN FOREVER

Nice, clean, luxury= fine automobile

Link to comment
Share on other sites

Like I said before. I believe the message is triggered if excessive resistance is shown in the circuit for the fuel pump, whether it be burnt harness(common) or pump itself. You may find that the harness is burnt to the pump, that may be the actual problem, but regardless I would replace the pump assembly

Wait are you saying that it may be something else. I had 11.4 volts at the connector that connects to the pump??

Link to comment
Share on other sites

the harness in the tank from the sender to the pump goes bad. It melts. Either way I would just replace the entire unit.

The resistance creates heat and damages the plug

GM FAN FOREVER

Nice, clean, luxury= fine automobile

Link to comment
Share on other sites

Did you replace the connector, harness? The voltage at the connection may not be getting to the pump. I think the pumps generally come with a new wiring part these days.

Link to comment
Share on other sites

My son paid for a new pump, and they didn't replace the wiring piece, and I got to do his pump again about a year later. 3 years later and it is still working fine.

Link to comment
Share on other sites

JUST TO BE CLEAR, Have you verified voltage to the connector for the sending unit. Purple wire I believe, and ground on 2 wires Gray, gray/blk. I hope those are correct,

Basically there are 4 wires to the sender

fuel pump 12v

fuel pump ground

fuel level sender ground,

Fuel level gauge output. variable ground.

the first 2 are what you need to run the pump.

GM FAN FOREVER

Nice, clean, luxury= fine automobile

Link to comment
Share on other sites

We removed the fuel pump relay and ran a wire directly from the positive terminal of the battery and she starts right up. So we are getting no power to the fuel pump relay? We used a volt meter at the fuel pump relayt and there is no voltage there. Any ideas?

Link to comment
Share on other sites

With the fuel pump relay out, check to see if there is power to the terminals that the relay coil connects to in the fuse block. Turn the ignition to ON - if there is not 12 V at the terminals for 2-3 seconds, then the issue is most likely a blown fuel pump fuse. It might be faster to check the fuse first.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...