How do I fix a secondary air pump to prevent backfire on a cold start?

Answer by  doc325 (454)

You need to pinpoint where in the air pump system your failure is. Check for power at the air pump, proper operation of the check valves, proper operation of the solenoids, and proper vaccuum supplied to the solenoid. Replace or fix the item that is faulty. Although it is unlikely that, this is causing a backfire problem.

Answer by  vathana (127)

If the air pump is back, it serves a different purpose. Now almost all hydrocarbon emissions leaving the tailpipe are generated immediately after cold-start, before the catalytic converter reaches operating temperature. As emissions regulations have continued to tighten, engineers have been working on ways to get the catalyst up to operating temperature quickly.

Answer by  carlady (182)

Cleaning it out is a good place to start. If it is dirty and has a lot of grunge and stuff in the filter is more likely backfire, the intake valve must also be tightened.

Answer by  happytimes63 (865)

If you do not plan on replacing the pump or possible hoses that are leaking you may be able to bypass the pump by splicing the pipes that lead to the pump. use a pipe and clamp them together. This may be dangerous and cause engine damage.Otherwise plan on having the pump replaced.

Answer by  mb (5482)

The easiest thing to do would be to route the secondary air pump's hose into the air compressor hose before the engine block. Arrange in a T-Junction with the first hose.

Answer by  hemantc (169)

To fix a secondary air pump to prevent backfire on a cold start 1 Usually either a plunger or diaphragm type actuated by the throttle linkage. 2 Inject a small amount of gasoline through a jet. 3 The reduction of the acceleration due to stumbling renew the pump.

Answer by  japratt (1687)

I would say your best guess at fixing this problem would be to replace the whole air pump so you wont have relapses.