Okay, well i have a 2002 Honda accord coupe,

anyway long story short, my original motor spun a bearing and cracked the cam so i replace the motor to a F23A1 NON ULEV motor, since i got the car is was late march, since then i never USED the AC, everytime i put the AC on the car Starts to ping underload HIGH RPMS 4,000 to shift (AUTO)...

i don't know if anyone notice this when you put Ur ac on at a red light the RPMS jump up... well my car does that and when i shut it off at a red light i STILL see the RPMS jump up from 500 to 700, then when the car starts to idle at 500 i hear that click 700, and it will ping,

now i took the batter off the car for 5 min and put it back on and the car doesn't ping AT ALL, as soon as i put the ac on the problem comes back....i have tried this for 2 weeks and it WONT ping till i put the AC on... anyone know what the problem could be? EASY FIX? is my COMPUTER MESSED UP? please HELP.

 

are you sure it's not your compressor making the noise?

 

but why would it still be clicking when its off and making the idle rev up? and then all of a sudden the car pings

 

I don't know. The compressor isn't harly enough load to make an engine ping.
Are you saying the compressor is clicking on and off while the a/c isn't on?

 

Many things can make your engine ping; but your AC / Ping question:
Check compressor clutch relay <– in your case I suspect this
Check condenser fan relay
Check also radiator fan relay

Remove your AC Belt and rotating the pulley by hand and feel bearing play and drag
Check your AC clutch pressure plate – Overhaul it if you can
Check your compressor clutch coil

Also check your EGR valve – and vacuum
Check engine even warning bulb OFF

 

Ping or heat sheild rattle?

 

TTTT

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGus &raquo;</TD></TR><TR><TD CLASS="quote">TTTT</TD></TR></TABLE>

I'm not sure why you're bumping this thread. They gave you some good advice, did you check it out?

 

Here is the thing, you can not learn how to swim by just reading post , you will have to remove your pants and jump in to the water – likewise you have to get some tools and remove the parts that you suspect – then you will know what’s going on