I 've '90 Mazda Interplay B6 engine (carb) mnual. There're 2 solenoid valve related to AC idle up how it work?

Answer 1

Most Mazda carb models have a vacuum throttle assist when the A/C is on. Check for a vacuum throttle assist near where the throttle cables connect to the carb. Check also when A/C is on and vehicle is running. Idle is probably to slow or too fast. There should be an adjustment on the canister to correct to a proper idle speed with the A/C on. Disconnect the vacuum hose while A/C is on to verify you are looking at the correct canister. Also verify there is no vacuum to canister when A/C is off.