Controlling vehicle emissions in modern vehicles involves more than just bolting up a catalytic converter and calling it a day. There are other components that effectively, and intuitively, cut out ...

Q: I have a 1990 Toyota Corolla LE, with automatic transmission, which I purchased new. It now has 101,000 miles on it. In all the years I’ve had it, there was never a major problem. All the service ...

Beginning in October, the exhaust from newly manufactured diesel engines must produce half the oxides of nitrogen (NOx) of engines produced today with no increase in particulate matter (PM). This is ...

For some time now ,I have been following a thread on Facebook concerning the EGR valve, which pertains to diesel-engined cars. In the thread, they mention about disabling the EGR (exhaust gas ...

The Exhaust Gas Recirculation (EGR) valve sends some of the exhaust gas back into the cylinders to reduce combustion temperature. This is required because nitrous oxides (nasty pollutants) form when ...

Question: I took my car to my mechanic, because the check-engine light was on. He checked the codes and said it’s an “EGR fault” He said it would be a couple of days before he could get to it. He said ...

While most of the early problems have been engineered out of the exhaust gas recirculation systems on today’s clean diesel engines, corroded coolers, stuck valves and other problems still plague ...

Several companies advertise products that modify diesel cars to disable the EGR valve. This is acheived either by means of a software update or a blanking plate. In the case of the latter, I believe ...

This is not in the least surprising because this is the EA189 Dieselgate engine on which EGR failures are extremely common. If you can't persuade the dealer and Volkswagen to replace it FoC, you will ...