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?

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 1,000 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!
  1. Home
  2. Questions
  3. Sporadic starting issues - 1990 Dodge Dynasty

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: Symptoms of an AC condenser going bad.

The condenser if it was not cooling properly, will cause the switch to shut off the A/C, and then once it cools enough, will allow the A/C to come back on. It would be hard to know if connection was...

Q: Where to troubleshoot fuel issue?

Hello, thank you for writing in. The issue could be any of the components you mentioned. There are several tests you can do, and you will want to pick the tests to perform first that are easiest for you to...

Q: Engine won't turn over after power loss

Hi Jess. It's quite possible that while replacing the alternator an electrical relay was damaged, possibly one that powers ignition system components, the starter or the ignition cylinder itself. In most cases, when an electrical gremlin like this occurs, it's...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...