Q: My 2007 Grand Caravan hard detonation problem

asked by on November 11, 2016

My car lacks power, misfires,, cannot drive over 40 mph because it starts to shake. So far replaced the ignition coil, sparks plugs, spark plug wires, crank shaft sensor and TPS. OBD II scanner detected cylinder misfire 1 and 3 (back) and 4 (front). Spark plug from 4th cylinder was burned. Put Cataclean and B-12 Chemtool on the tank. Runs smooth until you hit the accelerator.

My car has 180000 miles.
My car has an automatic transmission.

As you know, a misfire can be caused by many different reasons such as bad spark plugs, spark plug wires, faulty fuel injectors, lack of voltage to fuel injectors, incorrect fuel pressure, an air intake leak and many other possibilities.

The fact that spark plug #4 was burnt suggests that you may have a lean fuel condition which is usually a result of an intake air leak or potentially a bad fuel injector not supplying enough fuel to that cylinder causing it to lean out and burn the plug. This would also explain the shaking and lack of power due to the motor starving for fuel. I would recommend having an expert from YourMechanic come to your location to diagnose the misfiring problem so that this can be corrected.

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

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

Nissan Sentra 2007 problems with the tension pulley

Hello, thank you for writing in. There are a few things you need to look into. One, have you been buying the same brand of tensioner, and have they been warrantied? You may want to make sure you are getting...

Car lost power

Hello. Most of the time when this car suddenly stops like this it is because the timing belt broke. If it has never been replaced then this is very likely. It can also occur if the ASD relay failed or...

Put gas in car instead of diesel

Hello. It is important that you do not drive this vehicle anymore until you can get it repaired. Your fuel system will need to be flushed, the fuel pump will need to be replaced, and it is possible that the...

Related articles

What Happens to Sensors if They are Dirty?
Car sensors can get dirty with normal use. Symptoms of dirty sensors include reduced engine power, worse gas mileage, or an engine that hesitates.
How to Replace a Crankshaft Position Sensor
The crankshaft position sensor, along with the camshaft sensor, helps the vehicle determine top dead center, among other engine management tasks.
Symptoms of a Bad or Failing EGR Pressure Feedback Sensor
Common signs include engine performance issues like rough idle and decrease in power, failing an emissions test, and the Check Engine Light coming on.