Question about Cars & Trucks

1 Answer

My 99 buick regal cranks over and starts but has trouble running. If you give it gas to help it through the start up it levels out and runs fine. Fuel pump is good, I've changed spark plugs and wires,

My 99 buick regal cranks over and starts but has trouble running. If you give it gas to help it through the start up it levels out and runs fine. Fuel pump is good, I've changed spark plugs and wires, replaced most vacuum lines, I put a new cat on it and a few other things. I've tested as many sensors as I could but still no luck...

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Night Owl:

    An expert who has answered 10 or more questions between 12 midnight and 6am on the same day.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 37 Answers

Sounds like a stuck open EGR valve to me , take it off of a cool engine and spray some carb cleaner around the seat see if any leaks through to the other side. If it does The valve is bad. Also check out your throttle body for carbon and gumming. W/ engine off spray an appropriate carburator
cleaner into the opening and clean throttle plate and bore with a rag until shiney. put all the air cleaner hoses back together and hold throttle to floor momentarily until engine starts, then rev up half way and release throttle twice quickly, now allow engine to idle idle should be stable and smooth. If not then check for other sources of vaccume leaks.

Posted on Apr 18, 2013

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.
New users get to try the service completely Free afterwhich it costs $6 per call 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
  • 44 Answers

SOURCE: wont start

Check your rotor, distributor cap, coil wire.did you change the module inside the distributor cap.

Posted on Jul 20, 2009

  • 321 Answers

SOURCE: buick lesabre nightmare

Need to get a scan tool and look at the data stream while it is running for alot more info.Also any trouble codes.Sounds like initially,the engine isn't getting any fuel.I would have a pressure gauge connected to the fuel rail on the engine,so i could monitor the fuel pressure while all this is going on.Items to look at on the data stream would be timing,what timing is the PCM commanding for the engine.Also,have you checked for continuos power feed to the coils during this no start condition,and fire at the plugs while cranking.You could possibly still have spark,but maybe it is extremely weak?I have seen bad ignition switches cause weird problems before too.Many things power up through the ignition switch,just a thought.Have also seen bad PCM's cause strange problems..38 volts is a little on the low side for GM.Usually see those at,at least .50 and up,and rise steadily while pressing the throttle,up to just under 5.0 volts.Potentiometer with 5 volt supply.Vacuum leak can be checked with engine running at a steady idle speed,spray brake cleaner all around the intake manifold and listen for engine speed change.

Posted on Jul 31, 2008

  • 255 Answers

SOURCE: buick lesabre no start

Hi you have replaced allmost everything ,(try fuel pump relay)

Posted on Aug 18, 2008

csmock132
  • 4669 Answers

SOURCE: 1995 buick riviera sc won't start changed fuel pump ,

Have you checked for injection pulse or compression. Will it start if you spray carb cleaner in the intake?

Posted on May 05, 2009

  • 3 Answers

SOURCE: buick regal 92 3.8L Horrible fuel mileage

Sounds like you might have an oxygen sensor problem. Your catalytic converter(s) maybe defective or dirty. That in turn can dirty up the oxygen sensor. A defective oxygen sensor will send faulty info to the computer, interpreting the fumes as cold (even when the engine warms up). That causes the computer to adjust the fuel mixture to very rich, giving you poor gas mileage and the fuel smell. Hope it helps.

Posted on Mar 16, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

So my fuel pump has been making a high pitched noise for a while. Then one day, without warning, I tried to start the car but it wouldn't. It cranked but would not start. I turned the car on (not start)...


I looked at info for 3.1L vinM Buick regal. fuel pressure key on engine off, 40.5--47 psi. Can you check the vin? The fuel pressure specs I have for 3.8L engine are even higher than the 3.1L.
You will get a fuel pump prime, key on engine off. You need to make sure fuel pump runs with engine cranking.
My hearing is no good, I can't hear fuel pump with engine cranking.
Sometimes If fuel pump brushes are bad, the fuel pump may run intermittently. Sometimes you can bang on bottom of gas tank when trying to start and the fuel pump will take off running.

Apr 15, 2017 | Buick Regal Cars & Trucks

1 Answer

1992 Buick Regal crank sensor


You may be right, but if it is a sensor you should get a check engine light and a trouble code for the lost signal.
Could also be something like a fuel pump relay or idle air control valve.

Aug 23, 2012 | 1992 Buick Regal

1 Answer

I have a 1999 Buick Regal ls car run out of gas


A couple of possibilities. 1st, check to see that the fuel pump is working. When you turn the key to on position (not all the way to crank the engine over), can you hear the pump? You should hear a humming sound from the gas tank . The fuel in the tank actually keeps the fuel pump from overheating. It is possible the pump is shot. It would be a good idea to change the fuel filter, as it may be plugged up from sediment from the bottom of the tank.

Jun 28, 2009 | 1999 Buick Regal

3 Answers

Car starts and runs fine then dies


ya could be a bad filter. or maybe your injectors are getting bad.

Mar 08, 2009 | 1989 Buick Regal

1 Answer

I need to replace the fuel filter on a 1993 buick regal. Where is it located? I think I have found it but can see no way to remove the old one?


Husband found it but it did not solve the problem. But we can now hear the pump energize but the car still will not crank over and start. It acts like it is going to but just dies right away. This problem first started whenever I would go up the slightest incline, it would start running rough. Then on level surfaces it would go back to running fine and then one day it just would not start. Any suggestions?

Dec 07, 2008 | 1993 Buick Regal

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

172 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Randy Ohler

Level 3 Expert

14585 Answers

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

Answer questions

Manuals & User Guides

Loading...