Q: Crank but not start

asked by on

When I tried to change my fuel filter the other day it wasn't successful. After I tightened the filter and tried to start my car it would crank, but not start unless I pressed on the gas pedal. Then I tightened the bolt as much as possible and the same thing happened. Could there be air in my fuel filter lines that need to be bled out? Do you have any ideas?

Thanks for writing in about your 1990 Mercedes Benz E300. It sounds like the idle valve may be stuck closed and this could be why the engine only starts when the gas pedal is pressed. Due to the pressures generated by the fuel system for injector operation, fuel system air is generally quickly purged when the vehicle is first started.

The fuel system should be checked for leaks and the idle valve checked for free movement of the valve. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and equipment to access the fuel system and can diagnose and correct the no start issue for you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Crank but not start

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car won't start, latching noise

If when turning the key you hear a loud click or latching noise, that may be the starter gear kicking out to contact the engine flywheel in an attempt to start. Test the battery while trying to start the vehicle....

Q: Recommendation on oil changing intervals

No, you sill have to change it once a year. That's the problem with the engine oil. If you don't use it much, then water builds up in it since, as you burn gasoline (which is nothing but hydrogen and...

Q: Car electrical issues

The dash light may need to be replaced again. The light would need to be checked for a bad socket. The sunroof will need tested to see if the track is binding. The issue with your radio only working if...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...