Q: 1999 Pontiac Grand AM runs rough and smells weird

asked by on

I took my 1999 Pontiac grand am v6 to a mechanic due to overheating. Befor he worked on it the car ran good but overheated every so often. Sometimes maxing out the temperature gauge. It also had coolant leaks. He replaced the intake gasket and it no longer leaks, but it now runs very rough and shaky. My head bounces off the seat it shakes so bad. It has a odd smell coming from the exhaust. I can't really explain too well what it smells like (something to do with coolant possibly?) it doesn't seem to overheat and doesn't leak a drop now. But the serpentine belt is shredding. Maby he didn't put it on right? I just hope my car isn't screwed. it can still hit 70 mph just fine though, while it's in motion at 60 mph I don't really notice it anything, it doesn't show any signs of dying, just rough running, shredding belt, and odd smell coming from exhaust. I just want to know what's wrong with it or if it's safe to drive if I replace the belt

My car has 170000 miles.
My car has an automatic transmission.

Hello. An engine running rough at idle could be a vacuum leak creating the wrong fuel ratio for the engine to operate correctly. The smell is probably unburned fuel caused by the vacuum leak issue. The belt shredding could be an alignment problem. You may want to have the previous work double-checked to see if there is anything they can do to help. If you’d like, you could have another certified technician from YourMechanic come to your car’s location to inspect the rough idling and strange smell so that this can be resolved properly.

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
  1. Home
  2. Questions
  3. 1999 Pontiac Grand AM runs rough and smells weird

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

Q: Car overheating and running rough

A rough idle can be caused by many things. Something as simple as a bad spark plug wire or bad coil can cause a vehicle to idle rough. Since you have an overheating issue as well while driving, the problem...

Q: engine fan noise

The engine should always operate in the "normal" range as shown on your temperature gauge. If the temperature is too high, shut down the engine as overheating can have disastrous consequences (costly repairs). If too low, that is not an...

Q: Q: Lost of power

Hello. From what you describe it would appear that your vehicle may be experiencing more than one issue, possibly mechanical. Loss of power and fuel efficiency can be caused by many things. A few common causes are issues with the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...