Q: Rough idle after sensor and rear seal changed

asked by on December 20, 2016

Engine sensor fault code. Sensor changed.Fault cleared.Engine started and ran for 1 day and went into limp mode. Car towed into dealership to have rear main seal and sender wheel replaced.car starts but has rough idle.cam sensor tested ok. Dealer says seal was installed correctly but i suspect the TDC was not set to cylinder 1.what are the symptoms of TDC being set 180degrees off?Dealer is now wanting to change ECU that appears to be working fine and exhibited no issue prior to these changes?

My car has 70000 miles.
My car has an automatic transmission.

Car is shaking or vibrating Inspection $79.99 - $89.99 Get a Quote

Hi there. Sounds like the dealership technician may have removed some vacuum lines to get to the rear main seal and may have not put them back on. Check the back of the engine to see if any vacuum lines are disconnected. When installing a crankshaft position sensor, the computer will automatically adjust the timing. Another thing is check the transmission bell housing area for the vibrations. It is possible that the bolts to the torque converter could be loose or replaced if they were lost or broken. If you need further assistance with your engine vibrating after the rear main seal is replaced, then seek out a professional, such as one from Your Mechanic, to help you.

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

What others are asking

How do the Illuminated Entry lights work?

Your car is equipped with an Illuminated Entry system that turns on the lights to provide better visibility when getting into the vehicle. Here’s how it works: When you use the remote to unlock the doors, the interior lights...

What does it mean if the Malfunction Indicator Lamp comes on?

The Check Engine light is actually called a Malfunction Indicator Lamp. It’s designed to come on when there’s a problem with any component in your emissions system. That covers a wide range of sensors and other equipment on your engine,...

How do I tilt the moon roof?

The moon roof tilt is controlled by the moon roof switches, which are directly in front of the moon roof, on the ceiling. To tilt the moon roof open, press the TILT button once. To close the tilt, press the...

How do I reset the factory settings?

When the system reset is used, then your cars adjustable settings will be returned to the factory settings. To perform this command, follow these steps: 1. Press the Up/Down buttons on the steering wheel until Settings is displayed, then press...

Blown head gasket? 2000 VW Golf

Hello - yes, this bubbles in the coolant reservoir could indicate a blown headgasket. There is a specific test which determines if the bubble in the reservoir contain combustion gases. This would confirm a blown headgasket. Checking for low compression...

Plugged heater core

Hey there. The heater core may burst if you use too much pressure to try and purge the core of blockage. The core gets blocked from using the wrong fluid in the vehicle. The coolant will get all brown and...

My Hyundai Sonata is making ticking sounds

From what you've described, it sounds like you have an exhaust manifold leak. You may have the timing not set correctly, which cause a low power condition. You should have a certified mechanic, like one from YourMechanic, check timing and...

Can't turn off immobilizer on 2002 Jetta 2.0l.

The Immobilizer System Control has failed and is stuck in lock mode. I recommend either flashing the Immobilizer System Control or replacing it. If you need further assistance with your engine not starting, then seek out a professional, such as...

How do I adjust the head restraints?

Head restraints are important safety features that protect your head and neck in an accident. The head restraints should always be adjusted when you get in the vehicle. To raise the head restraints, simply lift them straight up. To lower...

Related articles

A Buyer’s Guide to the 2012 BMW 3-Series
The The 2012 BMW 3-Series has been wildly popular in the US since it was first introduced in 1975. This series of luxury sedans sets itself apart from other luxury models with its superior performance and driving dynamics. No matter...
A Buyer’s Guide to the 2012 Nissan Altima Hybrid
The The Nissan Altima is already a favorite among mid-sized sedans, but it gained even more points with a lot of car buyers with the option to buy a 2012 Nissan Altima Hybrid. Though the four-cylinder Nissan Altima was already...
A Buyer’s Guide to the 2012 Lexus CT200h
Although Although you wouldn’t know it from appearances, the 2012 Lexus CT200h actually shares a lot in common with the Toyota Prius. Mainly, it comes down to their engines (1.8 liters) and hybrid architectures. However, with the CT200h, you also...