Q: Check engine light flashing, sucking fuel, procrastinating when accelerating...

asked by on

Did a complete tune up,still running horrible.sucking down fuel, procrastinating when accelerating,super loud.throwing codes for a misfire on the 6th cylender, check coolant level, thermostat, coolant thermostat sensor.mechanic shop in town is not to be used with the aluminum.They cleaned all the grease out, put the plugs and coil packs back,replaced the intake manifold.ran like it was brand new for 2 days then it started the same thing.like you have to gun it to get the car to go, but once you're going you're good.pulled the coil pack off cylinder 6 and switched it with cylinder 2.That's all we did and it ran like new for 2, then the same thing.We are at a complete loss.Didn't unplug battery to reset check engine light, it turned off by itself...

My car has 185000 miles.
My car has an automatic transmission.

This is a very odd set of symptoms. I would suggest ruling out any fuel-related issues as the poor fuel economy and lack of power could be related to faulty sensors like the throttle body sensor, mass air flow sensor, etc.

I would recommend checking for any trouble codes again after swapping the #2 and #6 coils since this did not fix the problem, but should have registered new data in the computer.

A Check Engine Light diagnosis by a qualified mechanic is a good next step.

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. Check engine light flashing, sucking fuel, procrastinating when accelerating...

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: VVT replaced but light cam back on. engine was flushed and oil changed too

The Variable Valve Timing in your vehicle is designed to provide smoother idling, better power delivery and also helps to provide better fuel economy. In order to accomplish this, it often times requires either advancing or retarding the ignition and...

Q: Jerking reaction 2004 Hyundai

Hi There, This may be caused by a few different things such as a dirty or failing mass air flow sensor, low fuel pressure or potentially vacuum leak of some kind. Any of these are things that would result in...

Q: No power after startup

It sounds like your catalytic converters are stopped up. This is a common issue with fords. If you have an infrared laser temperature gun, you could aim it at your tailpipes while someone else revs the engine. If the catalytic...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...