I spent over $3,500.00 to have the Air Conditioning, fast idle, and fuel and temperature gauges fixed. None of them are working yet. I was told the AC secondary fan would not turn on which over pressurized the system. The mechanic doesn't know why the fan won't turn on. Why?
The van never used to idle at all. It does idle now but it never goes to fast idle when it is cold, so it dies a lot. Why?
Neither the Temperature gauge or the Fuel gauge work. Why?
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1Start the recharging process with any left over freon you may still have. Open the Civic's hood and attach the kit to the Civic's low side port. Then, set the kit onto a place in the engine compartment where nothing can move or shift once the engine has been cranked.
2Start the Civic and let the engine run until it reaches its normal operational temperature.
Single Pressure Gauges for Indl., Commercial & Specialty Uses
3Turn on the airconditioning to its coldest and hardest-blowing settings. Place a thermometer into one of the Civic's air conditioning vents and monitor how the temperature drops. Once the air conditioning's temperature reaches a level, constant degree, remove the thermometer.
4Open all four doors on the Civic. This will allow any colder air generated to escape, and this will keep the Civic's air conditioning for accidentally cycling off while you recharge the refrigerant levels.
5Turn the recharging kit's valve all the way down and let the refrigerant charge into the Civic's air conditioning periodically, shut the valve and look at the kit's gauge. This will allow you to monitor the recharging process. Allow at least one minute to elapse between refrigerant charges into the system.
6Shut the valve of the canister, once it has become depleted. Disconnect the kit from the low side port.
7Detach the hose, gauge, and valve from the empty canister and attach them to a new canister of refrigerant. Reattach the kit's hose to the Civic's low side port and continue recharging the system, allowing a minute between individual charges. The can itself can potentially grow very cold and hard to hold, even with gloves. Should this happen, wrap the can in a towel warmed in water. Ring out excess water before wrapping the canister.
8Place you thermometer into one of the Civic's air conditioning ducts. Keep an eye on the falling temperature within the Civic's air conditioning system. The system is charged when the temperature hits 40 degrees. Also, within the engine compartment, the Civic's air conditioning aluminum tubing become uniformly cold.
9Shut the recharging kit's valve and remove the kit from the low side port, once the system has been successfully recharged. Shut down the Civic's air conditioning, turn the engine off, and remove your key from the Civic's ignition. Also, shut all the doors
You cannot verify the operation of the air conditioner based on the line temperatures. You should invest in a set of AC pressure gauges to assist in troubleshooting the system. The pressures of the refrigerant will allow you to narrow down the problem.
First make sure to check all air conditioning component. A basic a/c gauge and test light is needed to help diagnose most air conditioner problems. Normally internal system moisture is a leading cause of air conditioner system failure. All air conditioning parts are available at http://www.1airconditioning.com/air_conditioning_parts.htm This helps to solve your problem.
Fuel gauge, is fuel sending unit or gauge itself.
Air bag could be a faulty clock spring, bad bag, bad module, or something else. Air conditioner I would need to know what is not working right to elaborate on that.
Typical problem of R-134 freon. It just doesn't perform well at idle, though hardware changes over the years have improved performance in later models.
However, be sure to cover the bases. Check freon charge with gauge set. Don't guess. Make sure the pressures are correct and that cooling fan is functional and nothing restricting air flow at condenser & radiator. High pressure from car wash wands can fold-over the cooling fins at radiator thus restricting air flow. I suspect all this is good but you should make certain to remove any doubt.
The "Tachometer" is the gauge that indicates the engine RPM. It is not unusual for the idling RPM to drop slightly when the air conditioner comes on. The air conditioner represents a fairly large load on the engine so when it starts, the RPM will drop slightly. When driving, you'll probably not even notice that the air conditioning is a load on the engine unless you're accelerating uphill, pulling a trailer or passing another vehicle while the vehicle is fully loaded. At idle, the Envoy's computer should detect the falling RPM and make adjustments in fuel delivery to bring the RPM back up.
In any case, it shouldn't be cause for alarm, unless the air conditioner is stalling the engine. If this is the case, you are probably in need of service. The issue of low cooling from the air conditioner while idling in gear (as is the case when stopped in traffic, etc.) is correctable free of charge at the dealership on certain vehicles as a result of a recall. Your dealer can tell you if your vehicle is affected or if there is other recall work pending on your vehicle based on the VIN.