Question about 1998 Cadillac DeVille

1 Answer

Won't start,has spark, has fuel

Recently replaced the fuel rail, fuel pump and fuel filter. Has injector pulse, has spark. Has fuel in the rail, but fuel pressure guage is reading zero

Posted by on

  • Bryan Webster Dec 12, 2012

    Also, all injectors are working. Lifted fuel rail from the intake and can see all injectors firing while cranking. All fuses and relays have been tested and working.

  • Bryan Webster Dec 12, 2012

    Just an update. It was the fuel pressure regulator. When we changed the fuel rail, the new one was an updated design. The new design also requires an update on the regulator we did not know about. It was allowing all the fuel pressure to by pass and return straight back to the fuel tank.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Cadillac Master
  • 21,873 Answers

Are you sure the injectors are spraying if the pressure is zero ?
Have you checked the fuel pressure regulator ?
Are the spark plugs dry ?

Posted on Dec 12, 2012

  • Bryan Webster Dec 12, 2012

    Yes, the injectors are spraying. Hal the plugs are getting fuel fouled and half are getting fuel starved. Trying to find a regulator at the parts store, but just hoping or some different things to check that we haven't already thought about. The regulator is the obvious thing, but this whole car is a basket case nightmare!

×

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 5370 Answers

SOURCE: Hello my 1991 cadillac deville won't go over

As per the problem, which you mentioned it indicates problem with fuel pump, the fuel pump is not holding the pressure.To pump gas from fuel tank to the engine there should be pressure.But if fuel pump is worn out, then this pressure will be low or in some cases there is no pressure at all.Replacing the fuel pump should help.----------- ----------------- But there few more possibilities for this problem too, other that fuel pump and fuel filter, it can be problem with sensors, the o2 sensor.Clogged catalytic converter, problem in transmission assembly.Transmission fluid very dirty or very low transmission fluid.Also get this checked and see.To check if catalytic converter is the issue, you can try this.Remove the o2 sensor , unplug the o2 sensor then rev the engine and see.If it goes up to 2000 to 3000 RPM then its catalytic converter issue. But if same problem like before is there, then get the fuel pump replaced, get the fuel pressure checked.It can be checked at any local garage.If the fuel pressure is checked fine then in that case get other possibilities related to transmission checked.----------------- This should help.Thanks.Helpmech.

Posted on Jun 17, 2011

  • 4 Answers

SOURCE: 1990 deville, replaced ecm, fuel pump, filters,

I had same problem in my 90 deville. Drove myself crazy, I replaced the sending unit in the tank with a new fuel pump. I also had to replace the fuel pressure regulator, which sits behind the rail system. It worked for me.

Posted on Jul 13, 2009

  • 55 Answers

SOURCE: Got fire, fuel pump and pressure good, but no

check fuses and relays, might have to check wire harness for injectors, you may have a break in the wire and have to reconnect it. check for voltage at injectors one at a time see if its all or one

Posted on Apr 25, 2009

  • 811 Answers

SOURCE: on and off fuel pressure @ the fuel rail of a 1990

check pressure relief valve

Posted on Sep 12, 2009

sparksflyin
  • 47 Answers

SOURCE: 1999 devile. No spark, no injector pulse. What's

crank sensor is bad

Posted on Dec 06, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

07 chevy cobalt 2.2L no injectors pulse!the fuel pump works fine!when I spray starter fluid inside the throttle body & than the want to start...NEED HELP PLEASE!!! LIKE A.S.A.P


Hi,

I would check n replace the fuel filter if needed. Also, it could be one of the spark plugs. Was it running before? Can you think of anything that happened or changed recently?

Aug 08, 2016 | Cars & Trucks

1 Answer

Car won't start


So then the next questions are - - do you have spark to the plugs and power and pulse ground to the injectors ?

Feb 01, 2013 | Cars & Trucks

2 Answers

Installed new fuel pump and cleaned all 6 fuel injectors but it won't start


Have you checked fuel pressure at the rail with a gauge yet ?
Are you getting spark to the plugs ? Have you tried spraying starting fluid into the intake to make sure it is a fuel problem ?

Dec 15, 2012 | 2006 Toyota 4Runner

1 Answer

I have a 95 oldsmobile 3.1 v6 that i just replaced fuel filter and pump but now wont start its getting fuel at the rail bleader


Was it dead before you replaced the pump? If so then check for spark. Just because the pump is new and you are getting fuel to the rail doesn't mean it's at the correct pressure. Check the pressure and also check for injector pulse at the injector harness connector. You can do this with a "noid light" (Harbour Frieght under $10). Let me know what you find.

Sep 02, 2011 | 1995 Oldsmobile Cutlass Supreme

1 Answer

The dash gauges all work , fuel pumps are both good , the fuel pumps wont come on and the truck trys to fire when i turn the ignition on but wont , could this be a fuel regulator


did you check the fuel pressure pump on the frame rail for power and ground? have you verified no ignition spark to the spark plugs? have you checked for fire from the coil to the distributor cap? does the check engine light come on when you turn the key on? have you check for injector pulse and power at the fuel injectors? if the fuel pump won't come on and you have no ignition fire and no injector pulse, all of these systems are triggered by the ECM.

Aug 12, 2011 | 1990 Ford F150

2 Answers

My 2001 Saturn, will start but not stay running. We have checked the fuel pump and all fluids. Did a compression check this morning, fuel injectors are not injecting fuel into fuel rail. Why is engine...


You said, 'fuel injectors are not injecting fuel into fuel rail' but it's my understanding that the fuel rail gasoline is supplied by the pump, and the fuel injectors just pulse to allow fuel to get to the cylinders. I would check out the fuel delivery problem further. Check for pressure in the fuel rail that is within specs.

If not, then the pump or fuel pressure regulator may be the problem. Check the fuse for the fuel pump. If good, then the pump may be bad in the tank.

Good luck on this.

Feb 05, 2011 | 2001 Saturn L-Series

1 Answer

Test: car won't start


does it crank but not start or does it just click like dead battery or starter if it cranks check for spark and fuel pull spark plug wire and insert a screw driver and hold it close to an engine ground and have someone try to crank the engine is there a strong spark and use what is called a noid light it plugs into the plug for the injectors to see if the injectors are pulsing it should blink when you try too too start the engine if you have pulse and spark check for fuel pressure there should be a service port on the fuel rail that looks like a valve stem for a tire sort of youll need a fuel pressure tester if you had no spark or pulse at tthe injectors its most likely either the cam sensor crank sensor or the computor(pcm) if only no spark change the coil if that doesnt work you might need an ignition module but that requires more testing I cant explain here see a technician if no fuel pressure remove fuel filter drain and attemp to blow air through it if you cant its clogged replace and try vehicle if no start still feul pump is bad replace pump .

hope this helped

Jun 18, 2010 | 2001 Volkswagen Jetta TDI

Not finding what you are looking for?
1998 Cadillac DeVille Logo

342 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...