Skip the auto shop - Our mechanics make house calls

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

asked by on

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?

A: Hello. It sounds like you have a problem wi...

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.

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: Occasionally there is a grinding noise when braking to a stop then engine stall.

Hi there. If the noise is only heard when the brakes are applied, then the rotors and pads are rubbing metal to metal. This can make a grinding noise that is heard throughout the vehicle. For the vehicle stalling at...

Q: My car will not go over 20 mph.

Hi there. Check the fuel pressure regulator and make sure that its working and plugged in. Put a fuel pressure tester on the fuel rail and make sure that there is good fuel pressure of 45 to 65 psi. If...

Q: Replacing the cam cover gasket on a 2001 Mitsubishi Shogun that is losing oil

You are obviously in England since you are talking about pounds. I know stuff costs more in England. But if they have to take the cam apart to do the cam seal, it's an expensive job. They have to get...

Related articles

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...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.