Skip the auto shop - Our mechanics make house calls

Q: i have a Mitsubishi io 4g93 it only accelerates up to 1500 rpm and the engine is shaking what could be the problem?

asked by on

I have a Mitsubishi io 4g93 it accelerates only up to 1500 rpm what could be the problem

My car has 200000 miles.
My car has an automatic transmission.

Hello. Thank you for writing in. The vehicle is at an age where it needs to updated and maintained. The issue will hopefully be solved by performing some regular maintenance. Start by performing an oil and oil filter change. When doing this, make sure the oil is not contaminated with any other fluids or metal pieces. Sometimes the metal will look like glitter. This would indicate the engine is having major issues. Secondly, update the spark plug wires and install new spark plugs. Resistance due to contaminants and corrosion will make the spark plugs and ignition system less effective over time. With fresh oil and spark plugs, replace the fuel filter and consider if you have ever replaced the fuel pump. It has worked hard at this point, and you may want to consider it if the maintenance does not fix the issue. You may want to consider using a fuel additive to help clean the injectors and fuel system. Lastly check the air filter, and clean it or replace it if needed. With updates to the oil, fuel, spark, and air systems, the car should run better. If not you will want to resort to further diagnosis. For more help updating the vehicle, contact our service department.

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!
  • Home
  • Questions
  • i have a Mitsubishi io 4g93 it only accelerates up to 1500 rpm and the engine is shaking what could be the problem?

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: Car wont start

When it comes to aftermarket alarm systems, most technicians haven't had a lot of experience with them. I personally have spent much time removing them from cars when they become troublesome. Most systems hide a simple relay under the dash...

Q: I'm trying to replace my right mirror on my 1999 Pontiac firebird but I can't take off the door panel

Removing the door panel requires a set of broad flat bladed clip tools (screw drivers are too narrow and will crack the plastic). In the Factory Service Manual, there is an illustration showing where all the clips are located so...

Q: Stopped accelerating and shaking at highish speeds?

Hello, thank you for writing in. The first step is to find out what issues are triggering the check engine light. This can be done by having the vehicle scanned for diagnostic troubleshooting codes at your local auto parts store,...

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...
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...