Skip the auto shop - Our mechanics make house calls

Q: Starts and runs with accelerators pushed. Sputters and stalls out. Carbon smell from exhaust before stall.

asked by on

No new trouble codes. New PCM module, TPS, IAC, cap, rotor, ground wires and battery. Oldl code was P0320, service writer says timing chain or timing chain guides. Runs fine above 1500 rpms. Still checking all wires and sensor connectors.

My car has 194366 miles.
My car has an automatic transmission.

A: Hi there, thanks for writing in. With this ...

Hi there, thanks for writing in. With this many miles I would start by doing a compression test. If the compression is low or way off from each cylinder then the engine is failing. If the compression is fine the I would typically start by checking the fuel pressure to see if it is where it should be. Low fuel pressure can cause these same issues. I would also check the crank and cam sensors just to make sure that they are reading right. If those are also fine then the compression will definitely tell if there is an internal issue or a timing chain. If you want to have your P0320 code figured out, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Transmission slipping even when I had the transmission replaced.

Hi there. If the transmission was slipping and you had the transmission replaced and the transmission is still slipping, then there could be an issue with the shifter cable or downshift cable. Check the cables and see if they are...

Q: My A/C is not blowing cold or at a consistent pressure, sometimes when it is on high it is barely blowing,

Hello. Firstly, I would check the actual A/C switch itself, with the A/C light on it. If that switch is bad the entire A/C system will not work. If the switch is okay then I would check the pressure sensors,...

Q: Car not moving when in drive.

This is usually caused by a valve body or leaking pressure inside the transmission. The transmission would need a complete check with the correct scanner and pressure testers to find the cause of your problem. I would recommend having a...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control 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...