Thanks for getting back with me.
Sorry for the delay in getting back with you .I encountered some technical difficulties .
Well, not knowing what they did years ago, that is did they surface the heads etc or if the radiator was flushed . Do you have another blown head gasket.
Have you checked your oil to see if there is coolant in it?
With the engine running at temp . Is there bubbling in your coolant overflow tank?
Is there white smoke coming out your tail pipe?
The mist over the plug wires is to check for sparks that are jumping from the plugs or plug wires to metal objects like the exhaust manifold etc. Sometimes the plug wires are not as thick and insulated as they should be. So as the car is running a spark may jump from the plug wire to say, the exhaust manifold. Now you have a rough idle, maybe it will start to read a misfire since that plug is not firing. The water attacks the spark and the engine will run rough for a second.
Does the car run hot or have you let it overheat in the past?
You may have to flush your cooling system and refill and see if it turns brown with oil again.
You can also purchase head gasket leak detector kits that will assist in checking for head gasket leaks.
The water of course going through the exhaust would give you a bad reading on the O2 sensors .
You stated a backfire earlier a backfire from the engine bay can be low fuel pressure or the ignition system. Since you changed the plugs, wires etc it may be fuel. Can you check your fuel pressure?
Friday, March 27th, 2009 AT 10:24 PM