Q: Q: Car idles Rough when stopped

asked by on

one day driving my service stabilitrak ,traction control, check engine light come on. Took it to get ready it came back p0300. I changed spark plugs wires and coils oxygen sensors upper n lower. Had it read again coming up p0302 pulled all injectors and cleaned them same thing so I bought 1 injector put it in 2nd firing piston. I bought me a cheap code reader I scanned it when driving came up p0302 and now p0004 I changed fuel pressure control sensor on fuel pump and continue to give same coeds but now also getting p0007 . I've done a noid light test on 2 cylinder and looks good not sure what's the next step? Change wire harness?

My car has 110000 miles.
My car has an automatic transmission.

Did you change the right fuel injector? Bank 2 is on the passenger side of the engine. If you have tried ignition and you have tested fuel pressure and made sure the fuel injector is ok. next check engine compression. If the engine compression for that cylinder is low, there is a good chance the engine has an internal problem like worn piston rings. Consider hiring an experienced technician like one from YourMechanic to do a few more checks on the vehicle and come to conclusion on a personal 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
  1. Home
  2. Questions
  3. Q: Car idles Rough when stopped

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: Steering wheel does not return

Due to the collision the wheel alignment has been disturbed but to re-align the car it will have to be inspected for damage. In the course of an alignment the damage would become apparent because any damage at all to...

Q: Yellow icon on dashboard permanent

Hi...it depends on which icon you are referring to. If it is the check engine warning light, that light will stay on until the fault detected by the engine computer has been repaired. Once the fault is repaired, the light...

Q: What causes the engine to run rough and the engine to die when the accelerator is pressed?

Hello. You have covered most of the common parts that fail with the exception of the idle air control valve/module. This is a unit that works similarly to the mass air flow sensor as it regulates the air intake into...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...