Skip the auto shop - Our mechanics make house calls

Q: Flames coming from the tailpipe and rough idle

asked by on

i started up my truck with a electric spark advanced 360 and started it up and idles great then you hit the gas and it struggles then thats when the flames put the tail pipe start

My car has 170000 miles.

Hello there, many common faults will cause your 1984 Dodge D250 to have a rough engine idle and have flames coming from the exhaust. When flames are seen coming form the exhaust it is most often due to unburnt fuel in the exhaust system, or improper valve timing. Either of these faults can be rather serious and have many different causes. The most common is faulty ignition timing, leaking injector, fuel pump, spark plugs, plug wires, and the cap & rotor. This vehicle should not be driven as the flames can cause a backfire that has the potential to damage the engine. A qualified Technician such as one from YourMechanic will be able to diagnose your rough idle and flame from the exhaust.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: EGG code p0400, multiple cylinder misfire, removed and cleaned egr and pipe with no change

Hi there. The P0400 EGR (exhaust gas recirculation) valve code may not be a valve not working. This code description is a EGR flow malfunction. The fact that your vehicle has multiple cylinder misfires leads me to believe the valve...

Q: What do I need to look for when I have to give the car gas when it's cold?

The fuel injectors have internal filter baskets and thus the only way to clean and service them is to remove them from the fuel rail and send them to a lab such as Mr. Injector for ultrasonic cleaning on a...

Q: My car's fuel efficiency is poor and it starts rough

There is a valve that is by the fuel neck next to the fuel filler inlet that measures the fumes from the gas cap and related areas. This valve is known as the EVAP purge solenoid valve. This valve controls...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...