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!
  1. Home
  2. Questions
  3. Flames coming from the tailpipe and rough idle

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: Shaking when in overdrive

Hi there. Check the fuel system and see if the fuel injector for cylinder number 2 is malfunctioning. The code P0402 means that the EGR is not functioning and the code P0174 means that Bank 2 is lean, which is...

Q: My car starts and goes into gear but acts as though it is struggling to accelerate and then it just quit

This may be many different possibilities, however this sounds a bit like a faulty or dirty idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into...

Q: Running really rough, not starting usually. Battery light came on. Car overheated. Headlights turn off when I put the high beams on.

Hi there. With the information given, it sounds like you accidentally put 3 bottles of Gas Heet (water / antifreeze remover) into the gas tank. There is to be only 1 bottle of Gas Heet to a full fuel tank...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...