Q: Engine noise, RPM fluctuation, ABS, 4x4 warning on

asked by on September 07, 2016

Several days ago, the dash in my car started showing the check engine light on. The car went into a limp mode. After I restarted it, the car began to shake badly and the engine shut off. I attempted to start it back up but it shut off again. I took it to a mechanic and he opened the hood. The engine was making clicking sounds. I was told that the problem was the timing chain had been skipping. He had the valves and gaskets replaced and there were no engine noises afterwards. However, another problem appeared. The RPMs would jump up and down erratically. The fluctuation of RPMs was occuring at higher speeds as well as during idling.

One time, I was driving at 90 mph, and it just switched to neutral. At that point, the dash was showing the ABS light on, the check engine light on and the 4x4 error. After taking the car to the mechanic again, the error code appeared indicating the turbo cooler. After having the turbo radiator replaced, and the car was restarted, another error code popped up showing the throttle issue. However, the throttle body checks out fine. I was told that I would need a DME replacement due to bad ECU. As I have already spent a lot of money, I'm reluctant to pay even more for something that might not be the cause of the problem. What do you think? Should I get it replaced or is there something else causing this?

Hello. It sounds like you have a problem with the DME (digital motor electronics) and the ECU (engine control unit). It would not be a mistake to have these two things replaced. It is an expensive repair but I’m confident that this will solve your issue.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Can slamming car doors lead to rattling noises in the door?
Slamming your car doors is not good for your car in the long run. Violent actions like this eventually loosen the fasteners that hold your doors together, not to mention that you could also shatter the windows in the doors....
What does the tire pressure monitoring system do?
Your Honda Accord is equipped with a range of sensors designed to make driving safer and more convenient. One of those is the tire pressure monitoring system (TPMS). The TPMS does just one thing – it monitors the air pressure...
Truck shakes, sputters, and loses power when accelerating.
Hello, I would enlist the help of a mechanic to inspect the engine (https://www.yourmechanic.com/services/engine-hesitates-during-acceleration-inspection) because this problem could be a number of things. I would do a tune up on it's spark plugs, air filter, fuel filter and then go...
What does the brake Warning Light mean?
The brake Warning Light is located on your instrument panel. This light will illuminate for two reasons: the parking brake is engaged, or the brake fluid is low. When you notice that the light is on, disengage your parking brake....
Car keeps smoking
If oil is leaking from the turbo seals into the intake, then it may be time to replace the turbo. You could also have an internal engine problem with the cylinders, or piston rings. I recommend having a certified mechanic,...
Driveshaft spinning
If the driveshaft is spinning, that means power is flowing through the transmission to the drive shaft. If this is the case, the problem is inside the rear differential. The rear differential receives engine torque via the driveshaft and transfers...
Car shut off and back on, ESP light on
Not sure if the ESP system is related to stalling issue but the stability control system is reliant on several sensors for proper operation. It could be the brake light switch (https://www.yourmechanic.com/services/brake-light-switch-replacement), which is a common failure along with the...
Car has power reduction and grinding noise
Hello. From the symptoms you are describing it would appear that the vehicle may be experiencing some sort of mechanical issue with the engine or transmission. The issues may or may not be related, however that should not be an...
How do you view the digital speedometer in a 2017 Chevrolet raverse
Many GMC and Chevrolet vehicles are now available with digital speedometers. There is often times a button with a picture of a road on it either on or nearby the steering wheel. When this button is pressed multiple times, the...

Related articles

Symptoms of a Bad or Failing Exhaust Manifold
If the exhaust is excessively loud, there are engine performance issues, or the engine bay smells burnt, you may need to replace the exhaust manifold.
P2097 OBD-II Trouble Code: Post Catalyst Fuel Trim System Too Rich Bank 1
P2097 code definition P2097 is a general OBD-II diagnostic trouble code that indicates a fault with the post catalyst fuel trim system...
P0538 OBD-II Trouble Code: A/C Evaporator Temperature Sensor Circuit High
P0538 means that voltage readings from the A/C evaporator temperature sensor that are irregular due to a faulty temperature sensor or wiring.