There could be many reasons for this but here is a very common one.
It may have oil leaking into the distributor. When your car cools the oil drains out. When it warms up, oil is pumped back in and it begins misfiring.
If you check the codes, it will show up as the camshaft position sensor. This DOES NOT mean your distributor has gone bad.
There are two o-rings on the distributor. One is on the outside where the cap bolts on and the other is inside on the rod going into the engine.
When these o-rings come in contact with oil and heat up they begin breaking down. They start letting oil into the distributor which gets on a lens and makes the vehicle misfire.
To correct this you have to pull the distributor, clean the oil out with an electronics-safe cleaner and replace the o-rings.
This is a common problem with the 94 Altima.
The aftermarket distributors sold by major retailers WILL NOT WORK correctly on this particular car and to get one that will work you must buy it from Nissan ($450 the last time I checked) or get one off a salvage yard.
I have a 2006 Altima and it is doing the same thing.
The difference in temperature between a warm tube misfire and a warm tube misfire in hot weather is the temperature that resulted in the hot weather .
My 2005 Nissan Altima is doing the same thing. The car has no heat when the car is stopped. You have to be going at a steady pace for it to stay warm. I have had the car looked at, at a Nissan dealership but without paying $800 dollars it can't be fixed..and there is no guerantee that it will work after the work. The dealership guy said he has alot of people complain about the heater in the 2005 Altima. Nissian won't do anything about it he said.
My Altima had that problem and it was the water pump going out. It started with temperature gauge was moving, but then it started leaking and finally the heater stopped being warm at idle.
starting with the redesigned 1998 altima the engine crankshaft was balanced much better to reduce vibration. we have a 1993 and a 1999 altima with the same engine and the 1999 is so smooth at idle i sometimes can't tell if it's running.
Most likely a rattle from that area in the engine bay when cold that subsides somewhat when engine gets warm.
u must be more specific the question is missworded and vauge
Coolant low in the radiator, or the vent down sills are plugged with leaves, and other debris.
why is my 2006 Altima blowing cold air when not in motion , example stop light or as soon as it is idling even when it has ran for a long time and the engine is warm. The controls for the "doors"(vent covers that direct the air)are run by vacuum. There cold be a vacuum leak of one of the doors is stuck.
Mines a 95 model and it took me 5 minutes. Just disconnect the sensor and splice the wires and connect the new sensor. Motor needs to be warm when you do it. Just dont burn yourself.
Misfire is usually caused by faulty spark plug wires or spark plugs or both. I don't see the throttle body causing misfire.
most cars misfire when it is really cold. try to warm up your engine before starting it up. If it still misfires when it's a nice day, something is wrong with your engine (spark plugs, battery, etc.)