Skip the auto shop - Our mechanics make house calls

Q: Loss of power

asked by on

driving down the road at 65 mph and all of a sudden lost power and put a lot of black smoke out the exhaust and barely could do 25 mph spark plugs on the right side are black like their not firing ones on the left all look good
My car has an automatic transmission.

A: Hello. From my experience with this truck t...

Hello. From my experience with this truck this is usually caused by a wiring issue on that side of the engine. If the ground loses connection then one side of the engine will begin to misfire and this will occur. I usually check the grounds and all of the connections first. If they are fine then the issue may actually be the computer.

Further testing with a voltage meter and a scan tool would be needed to make for sure. If you want to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the loss of power firsthand for an accurate repair.

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・Save up to 30%

Get a quote

What others are asking

Q: Engine light came on saying transmission system malfunction.

Hi there. The code is coming up for the torque converter clutch (TCC) is not working. Check the TCC fuse and see if it has blown. If the fuse is good, then the solenoid on the transmission that controls the...

Q: If my car needs a new crankshaft position sensor, will it still run?

Hello. The crankshaft position sensor will not usually cause a misfire, but in rare cases it can. Since there is a misfire on the number one cylinder, the source of that issue needs to be confirmed before you do anything...

Q: How can i check a bad fuel pump before replacing one.

Hello. The best way to test the fuel pump is to test the fuel pressure. You can do this by hooking up a gauge to the vehicles fuel test port. This is an in-line gauge that will tell you what...

Related articles

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.