Because the oil has settled to the bottom of engine, colder weather causes oil to thicken,and it takes a minute to circulate back up to the rest of the engine,causing a light lifter tapping sound. let it idle for a few minutes before driving.
If it persists after warm-up, you may need new lifters (and, possibly, a new cam) or an oil additive, although you need to consider the age of the engine, and the dealer's recommendations. I would not try to adjust lifters (if they are adjustable, which most are not), unless you have adjustable lifters and you can prove that the adjustment has drifted due to a loose nut. You can prove that by checking the torque on the nut and the range of quietness in the adjustment - one full turn is the normal range of adjustment - if you have a narrow range, put the adjustment back where it was. Please, consult the shop manual or a qualified mechanic before starting something like this.
If a car won't start in cold weather it is possible that the valve guides have been worn. This often happens in cars that have been using ethanol as a primary fuel.
Yes, usually when it is cold and needs more fuel to start. If the valve is hung open, exhaust floods the cylinder.
You will hear valve train clatter.
I have the same problem with my 98 sc1. After the car is warm I disconnected the Idel Air Valve Wire, the service engine light come on but the car didnt have the high idel problem. (the idel air valve also control the cold start "choke" you have to have it connected or it might quit from low idel and for your car to cold start the next day) I replaced the Idel Air Valve $45 and PCV Valve, and cleared the computer codes. Helped alot but didnt completely fix the problem. My next step is to buy a gasket for the throttle body.
The old car's engine was spluttering and struggling to start in the cold weather.
warm start is when your car has already been started an is hot, a cold start is wheen you have just started the car for the first time of the day, or month....
Ther is a cold start fuel valve on the intake that maybe malfunctioning. The value is open during cold start. Check wiring. The Haynes manual for the 1981ZX has procedures to test this valve
Would this cause the car not to start If the EGR VALVE is bad
How will you start the car without keys
faulty control valve on heater or air in the lines
Right corner of the air manifold, you can hear it breath when the car is running.
Starter or flywheel problem.