20 Most Recent 1993 Buick Riviera - Page 6 Questions & Answers

these sensors put out a small amount of AC voltage. If you ohm them they should give some resistance. A lab scope or a graphing meter will show a pattern and sometimes its just not high enough in amplitude. What is your ABS trouble code? the harness for the speed sesnor goes bad, and is very common where the wires flex when you are turning. if the harness is bad, you should be able to get a new one from the Dealer or a AC DELCO parts house.

Buick Riviera... | Answered on Sep 12, 2011

there is a geared strap inside of a antenna that makes the unit rise and drop,, they strip out,, some can be changed as in Toyota's I'm not positive that Buick has that switch out, you'd have to pull the unit to be sure , you could also check the local junk yards to get a complete replacement for pretty cheap, just be sure and find a 12 volt power source to check it before you purchase it, they have batteries there I'm sure !! Good Luck

Buick Riviera... | Answered on Aug 29, 2011


Buick Riviera... | Answered on Aug 25, 2011

If your brake pedal is soft i would suspect a faulty master cylinder. Check for fluid leaks and vacuum leaks to start with.

Buick Riviera... | Answered on Aug 21, 2011

the converter will self fill, when you say sliping what exactly is the transmission doing? a slip is when the thansmission is in gear at a stedy speed and then you try to excelate and the rpms go up but the speed drops. a flare up is a rpm run up just as the gears change in the transmission. if you have a slip you can try a can of transX ( it like magic juice in a can ) if that does not cure the problem then you are most likely looking at and overhaul, not if it is a flare up or late shifts check the vacuum to the modulator on the transmission if there is any fluid in the vacuum line replace the modulator, also service the transmission and the transX is alwise good after a service.

Buick Riviera... | Answered on Aug 09, 2011

As per your problem mentioned, it indicates the problem with fuel pressure.-------- The fuel pressure is low.---------- First thing you can do is get the fuel pressure checked, this will confirm the problem. --------- If the pressure checked low that means problem is with faulty pump and clogged fuel filter. -------- But if pressure checked ok,then in that case, other possibilities can be problem with o2 sensors,clogged converter,worn out injectors, problem with harmonic balancer, faulty crankshaft sensor.------------ The o2 sensors are before and after catalytic converter.-------Both the sensors are to be replaced.------ And as per you mentioned your problem, its quite possible that faulty o2 sensor will cause this problem.------ O2 sensor is the part which sends signal to ECM( the cars computer).It sends signal to computer about fuel / air mixture.How and when to send fuel to engine.--------- If o2 sends stops sending signal to cars computer then it will not send the fuel to engine.------- If the fuel pressure is checked ok, then its quite possible that the o2 sensor is getting overheated and this is stopping the o2 sensor from sending signal to ECM.But when your car shuts off the sensor gets cool and again it starts working.------ So as per problem, get both the o2 sensors checked and replaced.---------- Also get the crank sensor checked.---------- The fuel pressure should be 41-47psi.-------- But if fuel pressure o2 sensor, crank shaft sensor, injectors all checked ok, then, the harmonic balancer can be the issue.------ It may have jumped a tooth on the timing chain. Hope not. With the ignition off, put a wrench or ratchet w/socket on the large bolt in the center of the harmonic balancer and turn the engine clockwise, just a bit. Then, slowly turn it the opposite way, noticing how much 'slop' before it becomes hard to turn again.
Anything over 6 degrees (1/4") on the outside of the balancer is excessive. If this has actual timing marks, you can start at zero and take an accurate measurement of the degrees. -----------
The role of the harmonic balancer is to absorb energy and reduce vibrations in the crankshaft. It is an important component because the vibrations can be strong enough to damage the engine, as well as the accessories driven by it. The balancer is a composite device made up of metal and rubber parts. Rubber is prone to deterioration and this can cause slipping or even complete failure. Changing a balancer is a difficult task that should be left to a professional mechanic but it can also be done at home. Special tools are available that can help with this task, such as the harmonic balancer puller.-------- The harmonic balancer is located at the lower front of the engine. It is attached to the free end of the crankshaft, opposite the end that is joined to the clutch and transmission. The balancer is comprised of a metal inner hub and outer disc, with a thick rubber layer between them. The size and weight of the parts are designed to absorb specific vibration frequencies. This means that a balancer should only be used on an engine it was designed for, otherwise it will not be as effective. Most balancers will either have groves or a separate pulley attached to them for driving the accessory belts.--------

As with all engine components, the harmonic balancer will eventually fail and need to be replaced. The rubber layer between the metal parts is often the source of the failure. The adhesive bond between them can fail and cause the parts to slip, reducing the amount of power transferred. The engine accessories may not function properly when this happens as they do not turn at the required speed. The rubber can also break apart internally and cause a total failure of the balancer. Cracks on the visible edge of the rubber layer are a sign that it is deteriorating. The seal behind the balancer should also be replaced if there is oil leaking from it, as oil makes the rubber deteriorate faster.

It is often difficult to remove the harmonic balancer because of its tight fit with the crankshaft. However, a special tool called a balancer puller can make the task easier. The puller is a metal hub that attaches to the balancer with several bolts, and has a center bolt that presses against the end of the crankshaft. When the center bolt is turned, the puller pushes against the crankshaft and draws the balancer off it. After the balancer has been removed, the shaft key and slot should be inspected for damage and the key replaced if there are any chips or cracks.

Installing a harmonic balancer can be just as difficult as removing it. The contact surfaces on the crankshaft and balancer should be lightly oiled so that they slide together more easily. The balancer can be pushed onto the crankshaft by turning a bolt in the center hole. Since the locking bolt is too small for this, a larger bolt must be found with the same thread. To avoid stripping the thread in the crankshaft, the bolt should have several turns on it before any force is applied. It may be necessary to first tap the balancer on with a rubber mallet. Once the balancer is on the crankshaft, the locking bolt is secured with the correct torque.


Start with fuel pressure checking.If fuel pressure checks ok, then go for other troubleshooting possibilities.--------

This will help.Thanks.Helpmech.

Buick Riviera... | Answered on Aug 06, 2011

No !!!!!!!!!!!!

Buick Riviera... | Answered on Aug 05, 2011

Check the flexible hose connecting the caliper to the metal brake line.
These are notorious for either rusting and clogging.

Hope this helps...

Buick Riviera... | Answered on Jul 30, 2011

if you have bled the lines then yes you probably have an issue with the master cylinder or booster. The reason it is recommended that you replace both is because you have to take master cylinder off to get to the booster. You dont want to replace the master cylinder, only to have to go back and replace the booster if it did not resolve your issue

Buick Riviera... | Answered on Jul 29, 2011

Hello and welcome to FixYa!
If the problem is the master cylinder you don't need to replace the booster. You can fix them separately.
Hope this helps and thank you for using FixYa! Have a good one!

Buick Riviera... | Answered on Jul 29, 2011

Here you go....Hope this helped??


Buick Riviera... | Answered on Jul 26, 2011

sounds like the trans is failing could be the torke converter check the fluids while car is running it might be needing flushed and the screen changed but sounds like the converter

Buick Riviera... | Answered on Jul 20, 2011

I saw this done by a guy, he was not working on a Buick ... he went to the bone yard to get a replacement window - I dont know how he got the old one out, probably cut the rubber on the outside ... what I did see was he put a heavy string into the rubber channel that was in the car and lubricated the rubber heavily with liquid soap. He set the bottom of the glass into the botton of the gasket. Next he started pulling the string out which spread the gasket wide and the glass just popped into place. I saw it, it looked simple, I don't know that I could do it. Maybe you should try it.

I guess the tipping point would be what is the cost to have it done VS the cost of your getting a used glass from the bone yard.

Good luck.

Thanks for visiting FixYa.com this morning ...

Buick Riviera... | Answered on Jul 18, 2011

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