Question about Buick Riviera

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Spark plugs are fouling out on my 95 buick riviera. it is a 95 with a 2000 replacement motor. I have replaced the spark plugs and cleaned up. It will run for a little bit but is back fouling out within hours. What can the problem be.

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Build up on the spark plugs due to dirty oil being used. Maybe before selling it to you.Some other problems could be happening. for example, Bad fuel, bad timing etc.

Posted on Nov 12, 2008

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Scott, 95 GMC 5.7L keeps fouling plugs


Hi Dale,

Several factors can contribute to spark plug fouling:

- The air/fuel ratio may be too rich as a result of incorrect carburetor adjustment or a poorly performing fuel injection system.
- Worn piston rings or valve seals may allow too much oil to leak into the combustion chamber, leading to oil fouling.
- The ignition system may not be performing properly.
- Prolonged idling or continuous low-speed driving may keep the spark plug from reaching its optimum operating temperature. Using too cold a spark plug can lead to the same problem.
- A dirty air cleaner can create a too-rich condition which can lead to fouling.

Have each of the above checked and corrected.

Fuel, oil and carbon fouling can all be the result of different causes but, once a spark plug is fouled, it will not provide adequate voltage to the firing tip and that cylinder will not fire properly.

In many cases, the spark plug cannot be cleaned sufficiently to restore normal operation. Hence, I always recommend that a plug be replace, once it becomes fouled.

Cheers,

Scott


"If this has helped you in any way, please be kind enough to rate this solution"

Nov 02, 2011 | 1995 Chevrolet K1500

1 Answer

95 GMC 5.7l keeps fouling plugs


Hi Dale,

Several factors can contribute to spark plug fouling:

- The air/fuel ratio may be too rich as a result of incorrect carburetor adjustment or a poorly performing fuel injection system.
- Worn piston rings or valve seals may allow too much oil to leak into the combustion chamber, leading to oil fouling.
- The ignition system may not be performing properly.
- Prolonged idling or continuous low-speed driving may keep the spark plug from reaching its optimum operating temperature. Using too cold a spark plug can lead to the same problem.
- A dirty air cleaner can create a too-rich condition which can lead to fouling.

Have each of the above checked and corrected.

Fuel, oil and carbon fouling can all be the result of different causes but, once a spark plug is fouled, it will not provide adequate voltage to the firing tip and that cylinder will not fire properly.

In many cases, the spark plug cannot be cleaned sufficiently to restore normal operation. Hence, I always recommend that a plug be replace, once it becomes fouled.

Cheers,

Scott


"If this has helped you in any way, please be kind enough to rate this solution"

Nov 02, 2011 | 1995 Chevrolet K1500

3 Answers

'95 Buick Riviera, SuperCharger. Car won't Start up!


unplug the cam sensor behind the water pump pulley; see if it starts; if it does, shut off engine; replace both cam and crank sensors because crank sensors go out in these engines

Apr 25, 2010 | 1995 Buick Riviera

2 Answers

No fuel in a 95 buick riviera


sounds like bad gas, i would put some fuel cleaner in it ( I use Seafoam) and try that

Jul 25, 2009 | 1997 Buick Riviera

1 Answer

Spark plug location 1991 buick riviera


can't clean spark plugs...and DO NOT buy Champion brand, use Autolite or Delco. Your plugs are accessible through the inner fenderwells...remove front wheels to get to them.
P.S. do yourself a favor and do this as well, or in advance of the plugs...go to Advance Auto and buy "SeaFoam" gas additive and follow directions...drive at least 100 miles.
Good Luck

Jun 15, 2009 | 1991 Buick Riviera

2 Answers

Replace spark plugs in 95 buick riviera


The head on the back side of the engine is the same as the front side. The plug placement is the same. It helps to remove the coils to gain access to the rear plugs. Other than that an assortment of extensions, a flex handle ratchet, a mirror and a lot of patience. I think the dealer puts the car on a lift and reaches them from below. I use Auto-lite platinum plugs so I don't have do it so often on my 3.1L GM. The first time I changed plugs I wished I had hired the back three done.

Jun 07, 2009 | 1995 Buick Riviera

2 Answers

Engine misses at 35 mph code po 304 coil pack plug wire replaced


Information courtesy of http://obd-codes.com

A code P0304 may mean that one or more of the following has happened:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor (s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Hope this helps with your problem. Best of luck.
Greg

May 21, 2009 | 1998 Buick Riviera

1 Answer

Replacing spark plug wires on 1995 Buick Riviera


You need to drain some coolant. Loosen and disconnect water lines by the firewall- the ones in the way of your wire change. u need to get a diagram of the firing order of the engine so that those wires are correctly connected to the coil packs.

Mar 21, 2009 | 1995 Buick Riviera

1 Answer

Trying to change spark plugs


??? ...the spark plug wires are under a plastic guard. The plugs are lower - follow the wires. The ones at the firewall side of the engine are hard to get to...some suggest tilting the engine to access them easier...I laid on top of the engine and got them out.

Nov 23, 2008 | 1995 Buick Riviera

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