A fuel pump is usually not halfway it is either good or bad. It can have things that may not work associated with it, like a relay or fuse. But the pump itself is either on or off. It is safe to drive until it stops working. Then it will need a mechanic/shop to fix it.
Depends on what sensor you are talking about. Need more information.
depending on model, 1. supercharger belt loose ( if supercharged) 2. drive belts loose 3. engine air\fuel sensors aren't calibrated correctly or need replaced. 4. engine oil hasn't been changed in a long time ( most likely) 5. engine is worn out 6. transmission worn out 7. fuel pump is clogged or needs replaced 8. cam timing is off 9. rear end needs lubricated that should get you started
A keg typically lasts about 2-3 months before it needs to be replaced.
A disposable camera typically lasts for about 27 to 36 exposures before it needs to be replaced.
Mulch typically lasts for about 1 to 2 years in a bag before it needs to be replaced.
A beer keg typically lasts for about 2-3 years before it needs to be replaced.
A keg can typically last for about 6-8 weeks in a kegerator before it needs to be replaced.
Bagged mulch typically lasts for about 1 to 2 years before it needs to be replaced.
Latex paint typically lasts for about 10 years before it needs to be replaced or refreshed.
A keg of beer typically lasts about 2-3 months before it needs to be replaced.
Until you run out of fuel
if you have owned the car for a long time chances are the filter will need changing. the fuel pump should buzz when the ignition is turned on so if it does its a good sign it is ok. but there are companys out there that can check the fuel pressure to see if its ok. Adam www.aeautomotive.co.UK