Popular questions

Hi there. In most cases, the rotten egg smell accompanied by an OBD-II trouble code that indicates a bank 1 or bank 2 lean issue is due to a worn out catalytic converter. The catalytic converter can also give off...

Hello there, thank you for asking about your 1999 Nissan Altima. You need to fix any vacuum leak where un-metered air is getting in to the intake manifold. The additional air getting into the engine will cause the lean codes....

This issue that would need to be inspected firsthand. In the case of such a catastrophic event, I would guess some Diagnostic Trouble Codes (DTCs) would be stored. Retrieving these codes is the first step in the diagnostic process. It...

Hi there. As long as the motor mounts are for a big block, and the flywheel and transmission were originally designed for a big block GM, you should't have any problems with that engine swap.

A problem, in your circumstance, is if you let you the check engine light stay illuminated, by failing to address this EVAP leak, you will not in the future get notice of new issues if they arise. Fault codes will...

The SRS (Airbag) light comes on when the controller has sensed a malfunction somewhere in the system. The malfunction may be an open circuit or an incorrect voltage at any of the sensors. When the controller sees the error, it...

The PCM/TCM selects the gear based on vehicle speed and load. If you are noticing that the shift pattern is different than your earlier experience with the car, there might be a malfunction but otherwise you have to first see...

Hi Nicholas. Thanks for sending your question today. There are several things that must all work together in order to start a car. So, without knowing the details about what specifically is happening when you attempt to start, it's hard...

It would help to know a bit about the engine size. This model can have 6 different engines configurations. If the vehicle has a crank no start, then you will need to isolate the problem area by first testing for...

Hello - the rhythmic knocking you hear could be something driven by the serpentine belt (i.e. AC compressor) or the belt itself. It is also possible that this an internal noise - like the timing chain, which is immediately behind...

Hi there. If the battery is fine, then it may be a bad battery cable, starter, or even the security system. I usually try a spare key if there is one and also try starting it in neutral to make...

In order to get the reset the ECM and get the check engine light to turn off I would recommend having a check engine light inspection having a mechanic like one from YourMechanic come to you and scan the computer...

Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU. When the ECU...

It sounds like you are saying that while the engine is running, you can actually disengage the clutch such that you can switch gears, but there is no engagement upon release of the clutch . If there is a visible...

Unless there is a contributing factor in the failure, such as a deteriorated hose or hose clamp failure, the person who improperly connected the radiator hose is the only person responsible for repairing or replacing the engine. They may do...

Hi Jordan. When you have a rear main seal leak, it's very difficult to repair without removing the engine. Low oil pressure is typically caused by low oil levels, but also a failing oil pump. However, it usually does not...

Shaking of the vehicle can, of course, be suspension related so be sure to rule out faults there as a cause. If the engine itself is shaking or vibrating, the usual causes are problems with the motor mounts, engine imbalance...

Hello - it is normal to have a small amount of "fumes" exit the dipstick when it is pulled. The crankcase, is after all, a pretty violent place - oil and extreme temperatures combined with rotating hot metal. If you...

Do these "excursions" in engine speed occur only when the car is in gear (driving on the road)? If you have uncommanded acceleration in park, or failure of engine speed to return smoothly to idle after speeding up the engine...

The EVAP system prevents the escape of fuels vapors from the vehicle's fuel system. There can be as many as 10 different codes to the emission control purge system. The code that is received will need to be diagnosed before...

Hi there. Unfortunately, without being there to physically inspect the vehicle, it's hard to pinpoint the precise cause of the engine failure. However, one thing I can say without hesitation is that rewiring your vehicle's cooling fan was not the...

Hello and thank you for contacting YourMechanic. The fault for the car access system is displayed from the Control Module Car Access (CAS). The CAS is located under the dash by the steering column. Disconnect the battery ground to the...