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Corvette
C4 Forum
1987 C4 Z51 Corvette - New Owner
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<blockquote data-quote="VikingTrad3r" data-source="post: 267346" data-attributes="member: 2229"><p>right. like 100% of the c4’s ive purchased ranging in price from a $1000 roach to a $15000k ZR1, every one has had empty refrigerant!!</p><p></p><p>after that connector is back on, put the car to defrost and see what happens. </p><p></p><p>if it squeals like a pig there may be issuues with the compressor itself. pretty rare. sometimes its just the magnetic clutch not the whole compressor. </p><p></p><p>but if my experience is any indication, more than likely you will plug it in and nothing will happen. the ac compressor will not engage the clutch. </p><p></p><p>next thing to do while the car is running would be to find the low side pressure switch on the ac plumbing. its on the passenger side. i cant remember exactly which switch it is but i think its the switch on the larger diameter ac pipe coming out of the evaportator enclosure. </p><p></p><p>remove the low pressure switch, i *think* its a squeeze and pull type deal. </p><p></p><p>take a paperclip and jump the pigtail on the harness. not the switch itself in the pipe. (thats no longer connected to the harness!). jump the harness. </p><p></p><p>if u r calling for ac on the hvac unit (put on defrost) then that ac clutch should engage and now spin. remove the jumper and it should stop. you just simulated as if the system had refrigerant in it. </p><p></p><p>thats what i did on all my c4’s. hope yours is that easy! </p><p></p><p>obviously, it is possible there is a leak. (for certain jobs bubba will dc the ac lines and not bother to refill) i always put one bottle of ac stop leak in as i am refilling. </p><p></p><p>i am *not* a mechanic or ac guy and i am filly aware that what i did deviates from factory refill but.....i have icecold ac. in all my cars. cheers.</p></blockquote><p></p>
[QUOTE="VikingTrad3r, post: 267346, member: 2229"] right. like 100% of the c4’s ive purchased ranging in price from a $1000 roach to a $15000k ZR1, every one has had empty refrigerant!! after that connector is back on, put the car to defrost and see what happens. if it squeals like a pig there may be issuues with the compressor itself. pretty rare. sometimes its just the magnetic clutch not the whole compressor. but if my experience is any indication, more than likely you will plug it in and nothing will happen. the ac compressor will not engage the clutch. next thing to do while the car is running would be to find the low side pressure switch on the ac plumbing. its on the passenger side. i cant remember exactly which switch it is but i think its the switch on the larger diameter ac pipe coming out of the evaportator enclosure. remove the low pressure switch, i *think* its a squeeze and pull type deal. take a paperclip and jump the pigtail on the harness. not the switch itself in the pipe. (thats no longer connected to the harness!). jump the harness. if u r calling for ac on the hvac unit (put on defrost) then that ac clutch should engage and now spin. remove the jumper and it should stop. you just simulated as if the system had refrigerant in it. thats what i did on all my c4’s. hope yours is that easy! obviously, it is possible there is a leak. (for certain jobs bubba will dc the ac lines and not bother to refill) i always put one bottle of ac stop leak in as i am refilling. i am *not* a mechanic or ac guy and i am filly aware that what i did deviates from factory refill but.....i have icecold ac. in all my cars. cheers. [/QUOTE]
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Corvette
C4 Forum
1987 C4 Z51 Corvette - New Owner
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