Skip the auto shop - Our mechanics make house calls

Q: Loses power 60 mph

asked by on

My Chevy Express 1500 looses power during acceleration and at 60 mph the engine pops and pings. It has about 82k miles on it. It had a cricket sound chirping under the hood and took it to a local repair shop. The fan had a loose screw that was hitting the fan when it turned which caused the noise. The fan clutch was replaced for a better operating fan. I asked them to replace the serpentine belt, too. 2 days later I noticed a loss of power again when I accelerated to 60 - 65 mph. The engine sputtered making a popping sound. It doesn’t happen all the time but about 60% of the time. I tried high octane gas on one fill up, and it seemed to solve the problem but on the next fill up I went back to cheap gas and the problem returned immediately. The repair shop told me that a high mileage tune-up should solve my problem. Do you think the first repair this the repair shop did for me created the second problem? Or is it a coincidence that I started having power issues just after his first repair? Another repair shop suggested I use a can of BG 44K fuel additive.

Hi! I believe your problems are unrelated and not caused by one another. I think it’s more so awkward timing that both present problems than anything else. You may be in need of a tune-up.

I suggest that you have a technician check the condition of your spark plugs and do a fuel pressure test to ensure that you have the proper fuel pressure for the engine to operate normally. I also recommend checking the condition of the throttle body plate for excessive carbon buildup.

If you decide to get this fixed, enlist a qualified mechanic who can perform these checks to accurately diagnose your loss of power. Once this is done, an accurate repair can be made to get your car running normally once again.

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: I'm not sure what is wrong with the car and I don't want to pay a ridiculous amount for a diagnostic check.

Hello. You can try taking your car to a local auto parts store and have them plug into the scanner to see why the Check Engine Light is coming on. It may give you an idea if what is wrong,...

Q: Why does my engine stall so much?

Greetings and thank you for writing in with this question! Does the Check Engine Light illuminate when the vehicle stalls? If so, a certified mechanic (like those with YourMechanic) can scan the vehicle computer for codes. This type of stalling...

Q: Gear shifter loose

That’s a tough one to figure out without actually looking at it. There’s a roll pin and a spring to attach the lever to the column. The position of the shifter P,R,D etc, is held in place by a mechanism...

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...
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...
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...