Question about 1995 Pontiac Firebird
I have a 1995 firebird 3.4l that is sputtering and seems like it is missing,what are the best spark plugs to use and how often should they be changed.Or is there another possible solution?Thanks for any help you may have.
I have the same car with 138+ on it. I have tried several types of plugs trying to find one that lasts longer and gives the longevity I was looking for. The 4 or 2 prong styles were not any better. I would go with AC Delco platinum. The book calls for changing the plugs at 30,000 miles. That is both schedules also. However, if you are going to due this yourself be prepared, they are very hard to get at. Obviously not in the front of the engine, but in the back, especially on the left side with the air conditioner. So if you do change them, while your there you may want to change the wires as well. Get a wire puller, it will help.
I would go with easy solutions 1st for the sputtering, try cleaning the throttle body. (changing the plugs is a good start as well, along with the wires). Fuel filter is another easy and cheap try. If you have an engine light on, you may try the o2 sensors, there are 3, also relatively easy and cheap. Note: spray bolt off or some type of loosening agent 1st, also take care of the wires not to pull to hard as to break them. There is one on each side of the engine exhaust manifold and one in the cat.
I would also recommend getting the fuel injectors cleaned, if they have never been done, its time. It's not terribly expensive.
Next you could try replacing or decarboning the EGR valve. I have found them (OEM Borg Warner) on Ebay, much cheaper than dealer.
I would go with these 1st. There are many other reasons for this issue like a bad coil pack, but honestly I would be out of my technical skill range to give you fair help. These are the things I have done along the way with my 95 firebird and it still runs strong today.
So hopefully this helps
Posted on Dec 27, 2008
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Posted on Jan 02, 2017
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