Failed smog check, hi NOx, no error lights - What to fix?
2011年7月6日 · Excessive NOx is formed by high coombustion temps, and the two primary methods used to control it are the Exhaust Gas Recirculation (EGR) system, which displaces a …
Catalytic converters vs. the danger of inhaling exhaust fumes?
2012年6月29日 · “An oxidizing reaction converts carbon monoxide (CO) and unburned hydrocarbons (HC), and a reduction reaction converts oxides of nitrogen (NOx) to produce …
Do I need a Exhaust Gas Recirculation (EGR) Valve?
2008年11月18日 · The main purpose of the EGR is to allow some exhaust gas to recirculate back into the intake manifold when the car is under power. The overall effect is to lower the exhaust …
Heet versus Iso-heet - Maintenance/Repairs - Car Talk Community
2023年1月16日 · Heet is methanol; Iso-heet is propanol. The manual for my pickup warns me not to use too much methanol (the amount 12 ounces would add isn’t enough to matter), so I use …
Two Oxygen Sensors Monitor a Catalytic Converter
2015年11月22日 · All cars sold in the U.S, since model year 1996 are required to monitor the performance of the catalytic converter (s). It’s done using two oxygen sensors. Catalytic …
P0420 and engine coolant temp sensor. Weird problems
2018年12月22日 · That switch might be connected to the computer to use to issue warning messages. The switch component of the sensor is a much more common failure item b/c it has …
Vapor canister on vintage cars - Car Talk Community
2021年6月18日 · Hi, A few decades ago I replaced the V6 in my psuedo-street-machine with a more muscular V8. At the same time, all the smog equipment went with old the engine. Here …
New purchased car from dealer, now has engine light on
2017年2月17日 · A week ago i purchased a BMW 320i Coupe from a 2nd hand car garage. When driving it home (150miles) the engine light came on. Rang the dealer which he told me to get …
Public service announcement - Car Talk Community
2023年12月28日 · Apparently these cars have an issue where the EGR ports in the intake manifold become clogged with carbon. People recommend having the intake manifold cleaned …
P11C7 code from a gasoline engine? - Car Talk Community
2022年12月11日 · 2019 BMW X1 with a B46A engine CEL illuminated and a generic OBD II reader reports code P11C7, and defines that as a fault with the NOx sensor circuit. Wait, …