20 Most Recent 1998 Buick Century Questions & Answers


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1998 Buick... | Answered on Nov 26, 2017


many fuel pumps get there power from the relay that is energized by the ECM
there is a pressure regulator in the system that will report to the ECM to switch on the fuel pump when the pressure falls
if you have no power to the relay , it could be because the pressure in the fuel system is above cut in pressure or that pressure regulator is not passing the current to the ECM

1998 Buick... | Answered on Aug 14, 2017


Those adapters are barely functional at best. You will never get good sound, even if it was working perfectly. I tried one but then bought an aftermarket stereo.

1998 Buick... | Answered on Aug 03, 2017


Do you know how to do automotive electrical testing ? How to use a DVOM - digital volt ohm meter ? You have high resistance in the circuit . Use voltage drop to find the problem .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

1998 Buick... | Answered on Apr 14, 2017


code p 0420 refers to cat converter system bank 1---efficiency below threshold====causes ---cat converter---wiring---HO2S (heated oxygen sensor, the one in the exhaust manifold before the cat converter)
code p 0300 is random misfires
I would suggest changing the HO2S as it reports to the ECM on exhaust content so that the ECM can adjust the air/fuel ratio
so it is logical that if that unit is not reporting correctly, the cat converter may be having trouble burning off the gasses correctly
The oxygen sensor(O2S) reads the results of the cat converter operation and helps fine tune the ECM settings

1998 Buick... | Answered on Mar 10, 2017


The fuse box on the 1998 buick century is located in the dash (passenger side) , there is a removable panel on the side and just pull on it , there is even a tool to remove the fuses right on the panel.

1998 Buick... | Answered on Mar 04, 2017


you have to disconnect the wires and if u cant do that call a professinal

1998 Buick... | Answered on Feb 28, 2017


Check the Transmission control module first. If it tests OK then look at the shift solenoids inside the transmission

1998 Buick... | Answered on Sep 09, 2016


Purchase a Chilton manual for all the diagrams you need.

1998 Buick... | Answered on Sep 09, 2016


Should be in the power distribution center under the hood.

1998 Buick... | Answered on May 10, 2016


check fuses and relay first if good than more than likely---if when u use lever to turn on but wont stay on or dont go on at all would show that the multi switch (inside column ) either broke (plastic) or wore out ---

1998 Buick... | Answered on May 08, 2016


Under the dash on the left hand side but if there was a wire plug on old seat buckle should be able to loop circuit together so acts like seat belt is always hooked

1998 Buick... | Answered on Apr 29, 2016


is it HOT or just not as cold. If its HOT, like heated air, there is a door problem, if its just not cool, the a/c refridgerent is low and will need a recharge, most likely the comp is leaking.

1998 Buick... | Answered on Apr 09, 2016


further problems with evap system causing fuel starvation.... try running with evap hose vented to atmosphere.. if solves your problem faulty evap canister.... if not! blocked pipe or faulty evap presser valve

1998 Buick... | Answered on Apr 03, 2016

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