Question about 1998 Buick Regal

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I have a 2000 buick regal with a 3.8 some times the fuel pump has no power i changed relay nothing it set for a day ran great 20 min and now no power to the pump again please help me

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I know this dont sound right but check the oil if it is to low the oil sending unit will shut the fuel pump down

Posted on Aug 30, 2010

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2000 buick regal. Losing fuel pump voltage


http://www.bbbind.com/free_tsb.html free wiring diagrams ! Enter vehicle info. year , make , model an engine size . Under system click on engine ,then under subsystem click on fuel controls . Then click the search button , then click blue link .The 7th diagram down shows two fuel pump relays , This I have not seen before ! One is speed cont. relay an the other is just fuel pump relay ? The speed control one has a resistor in the electrical circuit . That is way your droping voltage .
Fuel Pump Electrical Circuit Diagnosis (VIN K)
Fuel Pump Electrical Circuit Diagnosis (VIN 1)

The PCM alters fuel pump speed by energizing the fuel pump speed control relay. Under normal conditions, the fuel pump speed control relay is energized. The applied voltage to the fuel pump is controlled by a resistor assembly. When higher fuel volume is required due to increased engine load, MAP sensor value over 90 kPa the PCM de-energizes the fuel pump speed control relay circuit. The increased voltage to the in-tank fuel pump allows a higher volume of fuel to be delivered to the fuel rail. The PCM also compensates for low system voltage by energizing the fuel pump speed control relay.

Have it check for codes !
Did DTC P0230 or DTC 1260 set?
--
Go to DTC P0230 Fuel Pump Relay Control Circuit or DTC P1260 Fuel Pump Speed Relay Control Circuit
Go to Step 3

May 05, 2017 | Buick Regal Cars & Trucks

3 Answers

2000 vw cabrio runs normal and shuts down, takes 5 to 20 minutes to restart, engine cranks but doesnt start, changed ignition coil, pulled diagnostic codes getting short to ground codes on cylinder...


On some models, the Engine Control unit has a power supply relay. These relays some times get internal dry solder points. After driving for some time the the solder will get hot and separate. When it cools down it makes contact again. You will have to replace this relay or open it up and re- solder the solder joints. The relay is usually located on the main relay station in position 3. the relay station is located behind the right dash panel.[right hand drive vehicles]. You may need to refer to a manual for your specific model to find the exact location of the relay.

Jun 04, 2010 | 2000 Volkswagen Cabrio

3 Answers

Cranks but won't start like it has no gas


did you reset the alarm/immobiliser system every time the power was disconnected???

May 21, 2010 | 1997 Volkswagen Jetta

1 Answer

I have a 2000 buick regal,3.8 that will not


u can try replacing the relay. when u turn the key to the position right before starting position which is the position it would be in when u start a car and let off key because car started, well this is somting to try turn the key to position right before starting position have sombody listing down by fuel tank and see if tey can hear pump come on, try a couple of times to make sure they can hear, also the pump will only come on for about 2 seconds each time u put the key in that position, if u do hear the pump come on each time u do that that means pump is working if so u need to build up fuel pressure which could b anywhere from 20 to 60 pressure, to build up pressure u need to turn the key to same position turn key off turn key back to that position then off and do it like 50 times each time u do that the pump is on for only 2 seconds only building a half to one pound of pressure thats why u haft to turn key somany times to build it back up, if u try that and car keeps almost starting but doesent then u need to build up a little more pressure. NOTE make sure u have gas, also most electric fuel pumps will go out when turned on dry

Nov 27, 2009 | 2000 Buick Regal

1 Answer

99 buick regal won't start


Hello, the Regal seems to have that problem. Insert your key in the ignition and turn it but do not turn the car on, make sure you here the fuel pump kick in, then at the end of you r fuel rail there should be a cap, remove it, use a very thin screw driver and push that part in, Be careful it's going to squirt gas, that's a good sign. If it does not, check your fuel filter. And last, if nothing above described works first check your negative wire on your fuel pump, second your injectors, they might be clogged.
Best of luck, God Bless.

Willie
ECSracing Team

Aug 14, 2009 | 1999 Buick Regal

1 Answer

New pump still no fuel


Its not unheard of for a pump to go bad that soon, can you hear it run when you turn the ignition to on position, if not chk. fuse and relay and all electrical connections and grounds, If it does run get a fuel pressure guage and chk. the pressure.

Aug 09, 2009 | 1987 Buick Century

1 Answer

1999 Buick Regal GSX won't stay running......


It's probably the mass airflow sensor and/or oxygen sensors.

Jun 18, 2009 | 1999 Buick Regal

1 Answer

Buick Regal dying


You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.

May 11, 2009 | 2000 Buick Regal

3 Answers

89 regal won,t start but after 5 or 10 min. runs great


sounds like your fuel pump is going out. One thought might be that the fuel filter is causing enough resistance to over heat the pump. I would check the fule pressure to determine a free flow of fuel.

May 01, 2009 | 1990 Buick Reatta

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