Recently replaced engine due to water damage. Now car sha...

Q: Recently replaced engine due to water damage. Now car shakes at idle and check engine light flashes.

asked by on November 11, 2017

Cars engine was replaced recently and at first check engine light was solidly on and had a bit of a shake during idle but I drove about 30 miles to pick up some things and now the check engine light flashes and the car shakes more. The catalytic converters is already messed up from the old engine also had a misfire on all cylinders. Could it be due to the old cat?

My car has 125 miles.
My car has a manual transmission.

If your catalyst is bad then I would suggest replacing it first and then clear codes and see how engine runs afterwards and if it needs further diagnosis.

Was this answer helpful?
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

Get a quote

What others are asking

Manual clutch not giving much resistance

Hello. If the manual clutch does not have very much resistance and you are having trouble shifting into First Gear and Reverse, the clutch master cylinder and slave cylinder need to be replaced. These components work together to allow the...

Car burning oil

Hi there, thanks for writing in about your 2006 BMW 750Li. The two causes of an engine to burn oil are faulty piston rings and faulty valve guides or seals. If the piston rings are faulty, this will allow oil...

I received a P0700 and P0750 code which required me to change the transmission Solenoid Pack. I put a new one in

You should have replaced the filter and fluid when replacing the solenoid pack. If you did then you may have internal issues with the transmission that require the transmission to be overhauled due to internal seals leaking on the clutch...

Related articles

The Check Engine Light Demystified
Your car Check Engine Light can mean many things. The Check Engine Light comes on when there's an electrical or mechanical problem with your car.
How to Install a Catalytic Converter
A catalytic converter is one of the most important emissions components of the modern gasoline engine. It is...
How Can Problems with the Ignition System Cause Misfiring?
Misfires Misfires are never good, and they're always a sign that there’s a problem with the engine that needs to be repaired. The problem won’t “go away on its own” and waiting too long can cause the situation to grow...