Q: My 2004 mazda b3000 is idling rough and has a loss of power. Engine light is on. Spark plugs and ignition coils have been replaced

asked by on

My 2004 mazda b3000 is idling rough and has a loss of power. Engine light is on. Spark plugs and ignition coils have been replaced. The problem improved but still remains. Engine light is still on.

The diagnostic test showed the problem is the ECU. However, I called another shop, and they felt this might not be the problem as if the ECU failed the truck would be dead.

Do you have any suggestions as to what this could be?

My car has 69000 miles.
My car has a manual transmission.

The ECU is basically the computer for the vehicle. Unfortunately this computer can fail in a number of different ways causing a number of different symptoms. It is not a for sure thing that the vehicle would be dead if the ECU has failed.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My 2004 mazda b3000 is idling rough and has a loss of power. Engine light is on. Spark plugs and ignition coils have been replaced

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: What is causing the steering wheel vibration?

Anytime you have a vibration in the steering or the steering pulls, the first thing I would recommend doing is to check all the tire pressures, then balance and rotate the tires from front to rear and road test it...

Q: Q: AC stopped working

The clutch on the air conditioning compressor is a common failure item and the complete compressor is usually replaced. Once the system is opened, the receiver/dyer or accumulator must be replaced at the same time to ensure proper system operation....

Q: Car turns off out of nowhere

Hello, I would suggest testing your alternator. If jump starting will start your vehicle, use a multi meter to test your alternator while the vehicle is running. Good alternators test in the range of 13.8 to 14.2 volts. If it...

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...
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...
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...