will the a/c cluch relay cause a of loss power?

Question

I get a test code 33 and a test code 73.

the a\c relay is bad

Answer 1

A loss of power? No.

A loss of AVAILABLE power? Sure.

Here's why: under normal conditions, the A/C compressor -- like any other part running off the belts, the power steering pump, alternator, and so on -- puts a certain amount of load on the engine. Each parasitic element on the belt "uses up" a certain amount of the power that the engine puts out. When an A/C clutch is functioning normally, it engages the compressor when the A/C is on, and releases it when the A/C is off. When released, the load on the engine is minimal.

When you have a bad A/C clutch, you've either got one that is freewheeling (unlikely), or one that is dragging -- that is, even when the A/C isn't engaged it takes power to turn the pulley, and when the clutch is dragging, it's on the way to seizing up. Consequently, it puts a much heavier load on the engine, and so "uses up" much more of the available power.

Still, if it were putting enough drag on the engine to be noticeable, I'd expect some belt slippage and squealing. So if you're not getting the squealing, it's likely not seizing up enough to put a serious load on the engine (unless the belt was overtightened to hide the condition, as on a used car from an unscrupulous seller.)

You've got codes, though, and a failing A/C clutch isn't likely to throw a code. Go to AutoZone and have 'em look up the codes for you. They'll be happy to do it for free, so that they can sell you the parts you need to fix the problem.

Answer 2

once you turn on your a/c you should feel the engine idle drop. Yes the a/c will rob you of 5 to 10 horses. Do you kow what the codes stand for.

Answer 3

Loss of power to what? If it's the engine...yes. The compressor turns on and takes 10 HP away from the engine.