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Re: I have a 2002 Santa Fe and I'm having problems with...
I'm assuming you're talking about the 'head pressure' to the condenser reading fine? You might have a clogged condenser or you have a 'mode door' which is either stuck open/closed.
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The evaporative emissions system consists of 5 major components 1. CCV - Canister Close Valve 2. Charcoal Canister & filter 3. Purge Contro Solenoid Valve (PCSV) 4. Differential Pressure Sensor (DPS - Fuel Tank Pressure Sensor) 5. Fuel Cap
Based on my experience, you have a PCSV which is sticking OPEN and constantly applying a vacuum to the charcoal canister. When you fill up, the fuel vapors which were absorbed by the charcoal are being constantly/continually sucked into the engine intake manifold causing an excessive 'RICH' mixture of fuel-to-air.
Well there are a number of things that can be wrong here. You may have a coolant leak, You may have electrical problems or a bad compressor. There is no easy way to figure this one out. I suggest you bring it in to the shop and have it tested. Most places will charge about $40 to $50 for a check-up of you Air Conditioning systems.
you have moisture in the system this causes your expancion valve to freeze up an stop working, thats why it works for sort time and when it de-freezes stars working again. you need to do a EVAC & RECHARGE with a good AC service equipment, specially attention to pull vacumm por at least 20minutes so you get all moisture out of the system.
Good luck
Yes you can add freon, the port will be on the line up at the accumlator tank (large silver tank on pass side close to the fire wall - will have a large black cap, does not look like a port) Get you a large can with a hose attached do not use it all save some for next year.
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