Skip the auto shop - Our mechanics make house calls

Q: Occasional rattling during driving at higher speeds on a '97 Ford

asked by on

I have a '97 F-150 4.6. When I am on a freeway and I punch it, it takes off. It rattles but only does it sometimes. Any ideas what could it be? 140,000 miles. Thanks

A: When fuel injectors get dirty, they get car...

When fuel injectors get dirty, they get carbon buildup and they often cause a rattle, and the valves can do the same thing. When you pressure clean the fuel injection system, that also pressure cleans the valves.

So, you would be getting two for one. It's cleaning the carbon of the fuel injectors and of the valves. A lot of times, that would fix it, because that is often what it is. It's carboned up engine doing it or it can also be the quality of gasoline.

Let's say you get the rattling to quiet down a bit. Go to Shell V-power and put in a high-test Shell V-power gas and see if it goes away. It means that you are using too cheap gas and it's not igniting correctly. It often happens when the engines get old. Sometimes they need higher grade gasoline as the engine wears inside.

If you would like, I would have a certified technician inspect your rattling issue and clean or replace your fuel injectors for you as needed.

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: My compressor went out. Will that cause my engine to not operate?

Hello. If you have an engine that is cranking but not starting, then you need to look on dashboard to see if the theft light is flashing first. If it is, then try a different key to see if that...

Q: Transmission fluid leaking

There are many places a transmission can leak from, but the first thing that comes to mind is the axle seal. The axle seal prevents fluid from leaking out of the area where the axle fits into the transmission. A...

Q: How do I display the trip A/B feature?

Your truck has a Base Message Center that keeps track of your vehicle's system functions. You can use this message center to display your vehicle's information and features. The Trip A/B feature logs the distance traveled for different trips. To...

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...
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...