I'll try to explain. Sorry if the names of the systems will sound to you not familiar. Model up to the year 2000. Nipples A1, A2,P - the entrance in front of the throttle. Nipple E - input after the throttle. Model after the year 2000- nipple P, also after the throttle. A1 - Management of the electromagnetic valve of the system of recirculation of exhaust gases (egr). E - Output control solenoid valve recirculation(egr). P - Solenoid valve canister purge. A2 - Management of the electromagnetic valve of pressure boost.
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