Cars can run poorly for a number of different reasons. The car may need to have the oil changed, or it could be low on gas. It is best to perform routine maintenance so the car performs better and little problems do not become big, expensive ones.
Car will run poorly if at all.
No. It may run poorly but it will start and run.
When your car does not run properly you need to assess why. You should take your car to a mechanic if you're having problems with it. It will run poorly, waste gasoline and pollute the air.
Poorly, it may idle to high or not at all.
I would test the temperature sensor first. Then have the car scanned.
The car will start and run poorly in the limp mode and the check engine light will illuminate.
The air entering the system will be unmetered, allowing the car to run poorly if at all.
cheap back up to crank sensor. it may allow the car to run with out crank sensor, though poorly
Nothing car will run poorly if at all until new gas is ran thru the engine.
The cylinders will misfire making the car run very poorly. Probable hard starting as well.
In most cases, no. Although, I have seen engines "throw a rod" and continue to run, poorly but not for long.
The car will run 'rich'. There will be more smoke from the exhaust and less power available. Fuel consumption will suffer. The engine will run poorly. If not attended to it could stop working altogether