Skip the auto shop - Our mechanics make house calls

Q: Sporadic starting issues - 1990 Dodge Dynasty

asked by on

I have sporadic starting problems with the car. Once it does start, it has no problems at all and runs great without hesitating or losing power. However, when I cannot get it to run, it usually starts up, runs rough for about 20 seconds and shuts off. The fuel pressure seems fine and there is spark. I had the fuel pump replaced along with the fuel filter. The dashboard isn't showing any lights on. What might be the problem?

A: This problem sounds like the fuel pressure ...

This problem sounds like the fuel pressure check valve, which maintains some fuel system pressure overnight, is leaking down and sticking "open" when the car is first started each day. Once the vehicle has started, with adequate pressure built up in the fuel system, it doesn't leak down enough during the day to cause a problem. Monitoring fuel pressure during a "first time each day" startup scenario will confirm this cause. A professional mechanic, like YourMechanic, can check out this problem, and replace any failed parts.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: At 60 to 70 there is a very good vibration if I turn the over drive off I don't fell it

I would recommend starting with the simpler things first such as checking the drive shaft U-joints. Also, check to be sure the tires and wheels are properly balanced and rotated. I have seen this happen quite commonly when the drive...

Q: Black smoke and rich fuel the codes P0191 & P0452 and short trim bank 1 & 2. Both at -28.9

Hello. You have 2 separate problems here. The P0191 (fuel rail pressure sensor circuit problem) may just be a symptom - it is reporting suspect fuel pressure on the rail. The fuel pressure on the rail is controlled by the...

Q: Engine has difficulty starting

If the vehicle starts you can essentially rule out a problem with the starting or charging system. So, forget the starter. There are numerous potential causes for the symptoms you are experiencing, but one thing that comes to mind is...

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 to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...