20 Most Recent 1987 Buick Century - Page 8 Questions & Answers

Just did one last week ,had to change headlight blinker switch

99% of the time when a egr code is set its not the egr its the sensor.Now i have only replaced a couple of egrs.The only other thing that will case it is clogged up intake ports.You will have to remove the intake to clean.Hope helps.

You can goggle the make and year and maybe it will give you one or else you can go to alldata.com and they will most likely be able to provide it.

Those years of Buicks I think always had the pcm located under the passenger side of dash. Usually you have to remove the glove box to access it.

You should take it in to a place like grease monkey. That way you don't have to worry about the release of coolant onto the street etc. That would be illegal.

Depends..GM programs it's cars not to engage cruise control if there is a emission or performance issue with the engine.

You find out what code or codes are stored in the BCM , FIX the problem then clear the codes with a scan tool not a code reader !

If this is a newer car with fly by wire throttle, any misinformation between gas pedal and TPS can cause these issues.

It's the switch that you turn on,it's bad.

there are 2 methods for idler pulleys all require to loosen the big nut holding the pulley on some have a bolt at the back of the bracket behind the puller that you rotate either way to adjust off or on others have a cog that runs on a rack that you turn up or down for the adjustment remember to re-tension the big nut when finished as the method of adjustment is for adjustment only and is not sufficient to hold the pulley in position

in what speed does it? if is in all speed that means something on drive train such as transmission or engine if does on certain speed can be tires or steering components

You don't say what year but its quite likely there isn't one. Its top up only or needs the sump pan removed to drain.

soak it with pb blaster for a day,wipe off excess and use a torch to heat the bolt,then try it

Do you have wires hooked up correctly ?

Hi Deb, when it stops an won't start pull two spark plug wires off the same coil an crank it over an see if it has spark ! If it doesn't have spark you could have a bad crankshaft position sensor or ignition control module . If you have spark take the air cleaner box off or the flexible rubber hose from the air cleaner box to the engine off , just a couple of hose clamps . Spray some carburetor cleaner into the engine, because it's flammable ! IF you do this an it try's to start you could have a fuel pump problem or a bad fuel pump relay ! One more question , is your check engine light on ?

When i use to set the mixture screws on my General Motor products, i would screw them in all the way, then turn them out 1 1/4 turns.

Larry

I assume the fuel issue is now sorted, you have good clean fuel now running through the system and contaminated fuel is not now causing the problem.

I also assume you have checked that the fuel pump is working properly.

If you have had some bad fuel or contaminants in the system I suggest you run the car on at least 2 full tanks of premium fuel before reverting to the usual cheaper regular unleaded. This will also help clean up the injectors.

If you have had problems with moisture in the fuel system do NOT ever use any fuel with an ethanol component. In any event I would never use any fuel containing ethanol in an older model such as yours. Ethanol is not only highly corrosive, but it also absorbs moisture(water) which will then settle in your fuel tank and cause problems once it builds up over a period of time. (This will occur
in any fuel tank). By the way Ethanol will slowly eat away at any plastic parts in the fuel system like plastic components used in some fuel pumps.

When the engine is missing under load as you have described (during hard acceleration or going up hills) it is often due to faulty spark plugs or the plug leads. More often than not one or more of the plug leads will be faulty.

If the spark plugs have not been changed in the past 24 months change them. Otherwise remove them and clean them and reset the gaps.

Renew the plug leads with good quality replacements and retest the vehicle.

hope it help