The secondary air system is designed to enable catalytic converter to heat up and reach its operating temperature more quickly after a cold start.
Principle of operation
Due to extra mixture enrichment during cold-start phase, an increased amount of unburnt hydrocarbons is carried in exhaust gas. The secondary air system improves the afterburning (oxidation) process in the catalytic converter, and in this way reduces toxic emissions. Heat generated by oxidation accelerates "light off" of catalytic converter and significantly improves exhaust gas quality during warm-up.
Showing posts with label ports. Show all posts
Showing posts with label ports. Show all posts
Monday, November 1, 2010
Audi A6 C5 4.2L V8 5V BAS Secondary Air Injection Maintenance
10:19 PM by onesecond
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Labels: 2l, air injection, Audi, audi a6, bas, catalytic converter, cold start, cylinder head, engine control module, exhaust gas, gas quality, inlet valve, mixture, oxidation process, ports, principle, toxic emissions, unburnt hydrocarbons, vacuum
Labels: 2l, air injection, Audi, audi a6, bas, catalytic converter, cold start, cylinder head, engine control module, exhaust gas, gas quality, inlet valve, mixture, oxidation process, ports, principle, toxic emissions, unburnt hydrocarbons, vacuum
Thursday, October 21, 2010
03-06 Nissan 350z Test pipes with Built in mechanical O2 sensor fix
1:31 AM by onesecond
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Labels: catalytic converter, catalytic converters, exhaust manifold, flange, liquid wrench, Nissan, nissan 350z, nuts bolts, o2 sensor, oxygen sensor, ports, s wrench, sensors, stubby wrench, test pipes, threads, wd 40
Labels: catalytic converter, catalytic converters, exhaust manifold, flange, liquid wrench, Nissan, nissan 350z, nuts bolts, o2 sensor, oxygen sensor, ports, s wrench, sensors, stubby wrench, test pipes, threads, wd 40
Before you begin, allow engine to cool down. Spray down all bolts & nuts with WD-40 (or similar) and allow it to soak into the threads. The nuts & bolts will seize themselves onto the threads and spaying them down with Liquid Wrench or similar will make it much easier to remove the nuts & bolts.
- Test pipes laid out & test pipes laid out w/ additional wide band O2 ports.
- Close up detail of mechanical O2 sensor fix
- Remove 3 14mm nuts at exhaust manifold/catalytic converter flange. There are three nuts holding the catalytic converter to the exhaust manifold. Two nuts are facing the ground on one side of the flange, the third nut is on the opposite side of the flange. Use a 14mm stubby wrench or “S” wrench to remove the third nut. Repeat for other side.
- Test pipes laid out & test pipes laid out w/ additional wide band O2 ports.
- Close up detail of mechanical O2 sensor fix
- Remove 3 14mm nuts at exhaust manifold/catalytic converter flange. There are three nuts holding the catalytic converter to the exhaust manifold. Two nuts are facing the ground on one side of the flange, the third nut is on the opposite side of the flange. Use a 14mm stubby wrench or “S” wrench to remove the third nut. Repeat for other side.
Tuesday, June 1, 2010
1984-1995 Honda Accord/Prelude Emissions PVC testing
2:38 AM by onesecond
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Labels: air cleaner, blockages, emissions, Honda, honda accord, hoses, intake manifold, kinks, models, oil sludge, oil source, pcv valve, petroleum, plunger, ports, prelude, pvc, splits, valve cover, vapors
Labels: air cleaner, blockages, emissions, Honda, honda accord, hoses, intake manifold, kinks, models, oil sludge, oil source, pcv valve, petroleum, plunger, ports, prelude, pvc, splits, valve cover, vapors
The PCV valve is easily checked with the engine running at normal idle speed (warmed up). Gently pinch the hose shut, then release it; the valve should click. If there is no click, check for plugged hoses or ports. If these are open, the valve is faulty. With the engine OFF, remove the valve from the engine. Shake it, listening for the rattle of the plunger inside the valve. If no rattle is heard, the plunger is jammed (probably with oil sludge) and should be replaced. Never operate the engine without the PCV valve or with the hose blocked.
Don't blow directly into the valve in an effort to free the plunger; petroleum vapors and deposits within the valve are harmful.
Don't blow directly into the valve in an effort to free the plunger; petroleum vapors and deposits within the valve are harmful.
Wednesday, May 5, 2010
Water/Methanol Injection System for Chevy Cobalt SS/Iion Redline and All Ecotech Engines
11:47 PM by onesecond
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Labels: chassis, Chevrolet, chevy cobalt, chevy cobalt ss, connect one, ecotech engines, fluid reservoir, ground location, improper operation, location source, nozzle, PDF Download, ports, power source, redline, reservoirs, secure connection, solenoid, throttle plate, water methanol injection
Labels: chassis, Chevrolet, chevy cobalt, chevy cobalt ss, connect one, ecotech engines, fluid reservoir, ground location, improper operation, location source, nozzle, PDF Download, ports, power source, redline, reservoirs, secure connection, solenoid, throttle plate, water methanol injection
Solenoid Upgrade (optional)
The optional Solenoid Upgrade (#40060) is required if the nozzle is to be installed after the intake throttle plate (as shown), or the fluid reservoir is mounted higher then the nozzle. It is highly recommended for trunk-mount reservoirs.
Finger thread the two 1/8” NPT quick connect fittings into ports labeled IN and OUT on the solenoid. Tighten an additional half turn past finger tight.
The optional Solenoid Upgrade (#40060) is required if the nozzle is to be installed after the intake throttle plate (as shown), or the fluid reservoir is mounted higher then the nozzle. It is highly recommended for trunk-mount reservoirs.
Finger thread the two 1/8” NPT quick connect fittings into ports labeled IN and OUT on the solenoid. Tighten an additional half turn past finger tight.
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