Toyota EGR (Exhaust Gas Recirculation)
The EGR system is an emission control subsystem. It reintroduces a small amount of the exhaust gasses back into the intake manifold under certain circumstances in order to reduce the intensity of the combustion and lower peak combustion temperatures. This serves a couple of purposes: It decreases the creation of nitrogen oxides, which are a main ingredient of smog. It also slows the rate of combustion so that it is more likely to result in a controlled burn rather than a violent explosion that results in pinging.
When the EGR system isn’t coming on properly (insufficient flow) it results in higher nitrogen oxide emissions and can also cause your engine to ping–that rattle you may have noticed at times on acceleration. Chronic pinging can lead to severe engine damage. When it’s coming on too much or at the wrong times it can result in running rough or dying at idle, or sometimes surging at light throttle cruise.Toyota Emergency Brake/Parking Brake Cable
Toyota Emergency Brake Cable A binding park-brake cable can stick in the applied position and cause your rear brakes to wear out prematurely.
Depending on how far it’s driven while on, it may also heat up and ruin your rear brake drums, and even cook the hydraulic wheel cylinders, which can result in loss of brake fluid and decreased brake pedal engagement.
On most Toyotas, the park-brake cable activates the automatic-brake adjusters. Consequently, if the cable is broken, the rear brakes get out of adjustment and become less effective.
Even if you are mostly parking on level ground, it’s a good idea to use the park brake regularly in order to keep the rear brakes in adjustment and to keep the self adjusters from seizing up due to lack of use. Schedule an appointment for a Toyota brake service if you’re experiencing this.
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