Where is the Auxiliary Air Valve on my 98 Civic?I have a 98 Honda Civic ex and need to change the Auxiliary Air Valve
you don't have on the Civic. The Auxillary Air Valve is a part of the AIR (Air Injection Reaction) system used to control emissions on domestic vehicles. Honda doesn't use that part nor that system. there was another 'auxillary air valve' used in old Bosch fuel injection systems that added air when the car was in cold start enrichment. that part hasn't been used in the last 20 years by any manufacturer. The control of the idle at cold start is done by the idle air control valve. The idle air control valve located under the thottle body on most hondas; some models have it on the side. there are usually two vacuum hoses and one electrical connector to the valve. that valve controls the engine idle and when bad it would cause the engine to surge at idle. if that's not the case, then we need more information on what you are trying to fix and what you mean by auxillary air valve. if there is a diagnostic trouble code associated with it then that would help. hope that helps
l was told by a mechanic that I had a bad auxiliary valve and I would cost $1200.00 I can t find information on such a thing. Douglas
