cab lot of answers to that one but first place to check, is to make sure automatic choke is shutting off completely Spark plug gap is pretty important. Pull the plugs and gap to .30 to .35 and that may help the engine to run more smoothly.
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 .
Yes! Thermostat stuck open. Replace thermostat. It could, but the thermostat is normally open when the engine is warm so you should only notice this when the engine is cold or warming up.
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.)
Misfire is usually caused by faulty spark plug wires or spark plugs or both. I don't see the throttle body causing misfire.
1996 Ford Contour is sometime caused by a misfire on startup. The error will clear itself after 3 complet warm-up cycles not restarts.
The LS is prone to coil failure which leads to a misfire in the affected cylinder. A misfire due to a failing coil usually happens when the engine is warm and under load (low RPMs, accelerating or going uphill). The misfire may feel like a transmission problem because it causes the car to buck and stutter as though the gears were skipping or getting stuck briefly. The worse the misfire gets, the harder it will be to accellerate. Sometimes the misfire condition can be overcome by applying more RPMs or reducing the load on the engine. See my post about the valve cover leaking issues contributing to this issue.
1996 Ford Contour is sometime caused by a misfire on startup. The error will clear itself after 3 complet warm-up cycles not restarts.
Are you sure warm has anything to do with it? I thought my mx-3 getting warm then bogging down and it ended up being that the catalytic converter had fallen apart and was restricting the exhaust.
Your thermostat may be stuck in the open position. It is a strightforward task to replace it. If you pop the hood and look from the driver side towards the engine you will see a small diameter hose connected to the thermostat housing with 2 bolts. Drain the coolant, remove the bolts, replace the thermostat and refill.
I recently serviced a 2010 f350 with 6.4 diesel engine that was overfilled 9 quarts. Yes nine quarts. Truck ran like that for over a month and the symptomps were similar to having a misfire. The idle was rough, truck was shaking a lot,like it had a bad engine mount it was also choking at times especialy when warm.
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.
Try adjustin the engine idle speed,(600-800 rpm) but remember adjust it when the engine is warm,a cold engine will raise your rpm and lower to normal when it becomes warm. If this does not solve out you may need to adust the alternator belt.Good luck