When does a head gasket breech cause rough idle?
A headgasket breech will cause a rough idle, but it usually becomes more apparent under load, when the pressures in the cylinder are the highest.
What does rough idle mean in a car?
When you first start the car in the morning it has a ‘rough’ idle but is fine after a minute and is also fine the rest of the day. Is this a sign of a problem with a head gasket? Thank you! Probably not. Any sign of oil and coolant mixing, either in the oil pan or the radiator? Are you using a lot of either fluid?
When to know if you have a head gasket problem?
It’s not likely a head gasket problem. You may have a failing fuel pump. The fuel pump has a check valve in it that allows the system to maintain fuel pressure when the engine is at rest. This assures the engine will start instantly.
What to do if your exhaust gas recirculation valve fails?
The fix is to service the valve regularly and make sure that it is clean and fully operational. This is the Exhaust Gas Recirculation valve, which sends some of the engine’s exhaust gases back through the intake system to lower the vehicle’s emissions. Over time, the EGR valve can fail in the open or closed position.
When did the head gasket fail on my Subaru?
The main problem years are 1996 through 2004. The most common engine to have head gasket failures is the naturally aspirated (non turbo) Subaru 2.5 L four cylinder engine, commonly known as the EJ25 motor. The single overhead camshaft (SOHC) variant experiences failures much more frequently than the dual overhead camshaft design (DOHC).
What happens to the exhaust note at idle?
The exhaust note will change pitch at idle, but there is no change in rpms if you watch the tach. You must log in or register to reply here.
Why is my truck loping or surging at idle?
If you have a scantool look at the actual rail pressure and the desired rail pressure when you have the problem. If they stay close together its not a regulator if the Actual is high by more than 500 psi you’ve got a regulator issue. If you have a scantool look at the actual rail pressure and the desired rail pressure when you have the problem.