MY 04 SEVILLE HAD SEVERAL CODES.

2004 Cadillac SLS

Tiny

Rjotwins

November, 14, 2011 AT 10:44 PM

I've fixed several of the codes. I had a new tune up, o2 sensors, grumet. I still have p300 code and my car bogs down alot, plus it shakes at 500 rpms. It cuts off at times and I have to put it in neautral. My mechanic says I need crankshaft sensors. So what can I do?

FOUND 2319 RELATED QUESTIONS

3 Answers

Tiny

Jacobandnickolas

November, 14, 2011 AT 11:25 PM

A PO300 is a random misfire. Many things can cause it. Start easy. Check for vacuum leaks, and check fuel pump pressure to make sure it is within spec.

Tiny

cadieman

November, 15, 2011 AT 3:48 PM

If you have the engine scoped they will tell what cylinder is causing the misfire. It may be a bad plug or wire.

Tiny

rasmataz

November, 15, 2011 AT 3:55 PM

http://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs

2.Inadequate spark/coil,defective spark plug wire.

3.Lack of compression

4.False air leakage.

5.Faulty fuel injectors.

6.Insufficient fuel pressure.

7.Contaminated fuel.

8.EGR valve that is leaking.

9.Oxygen sensors.

10.Throttle position sensor.

11.Manifold absolute pressure sensor

12.Mass Airflow Sensor

13.Idle air control valve

Note: If it doesn't apply disregard it-

Please login or register to post a reply.

Crankshaft Position Sensor Replace Chevrolet
Crank Angle Sensor Replacement Mercedes Benz
How to gather codes Ford Explorer
How to read codes Chevrolet Blazer
Code Read Retrieval/Clear Mercedes-Benz C230