Skip the auto shop - Our mechanics make house calls

Q: Rattle in gas pedal and then loss of acceleration

asked by on

On the interstate, I was driving in the carpool lane during rush hour, around 5:15pm, when there was suddenly a rattle anytime I pressed the gas pedal. While at 60 mph, I removed my foot from the gas pedal. I tried pressing it again a few seconds later and the rattle was still present, plus there was no acceleration. It dropped to 40 mph and I again removed my foot from the pedal. 20-30 seconds after that (which was also same time since the first rattle), the engine stalled at 35 mph. There was a lot of traffic and fortunately the interstate had a left shoulder for me to get on where the car slowly stopped. The power loss had been totally without warning, unexpected, and sudden. This was extremely dangerous, plus very frightening! The dealership told me today that the problem was due to the high pressure fuel pump having failed. What is your assessment of the problem and how should it be fixed?

A: Hello. It is very common for the high press...

Hello. It is very common for the high pressure fuel pump to fail and cause this. If the engine is lacking fuel then it cannot run right, which will cause the noise you were hearing. It is perfectly normal for the engine to lose power when this occurs due to the lack of fuel pressure. It is likely safe that the dealer did a complete check of the fuel pump to diagnose this issue, but if you would rather have this double checked and repaired elsewhere, a technician from YourMechanic can come to your location to take a look and replace your fuel pump if necessary.

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: When I am accerlerating, I feel a vibration.

Hello there, many faults will cause your 2004 Ford Taurus to have a vibration in the gas pedal. It is good that you referenced where the vibration is coming from, as this varies what will cause it. The most likely...

Q: Car wont go into any gear. 2002 BMW 325xi

Hi - your symptoms describe a clutch hydraulic system failure. Given your mileage, your slave cylinder has probably worn out. This would be evidenced by low/no fluid in the clutch fluid reservoir. If the clutch shares the reservoir with the...

Q: I got a 1999 Ford Windstar LX. It is jerking when I go over 45 or 50.

Hi there. Either the EGR - Exhaust Gas Recirculation - has been plugged up or the MAF - Mass Air Flow - sensor is dirty or damaged. Try removing the vacuum line to the EGR and test driving the vehicle...

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...