Sparktacus 10 Posted June 7, 2014 Share Posted June 7, 2014 (edited) I want to check my own AC coolant in my Spark. The kit I have says to use the Low valve, but I can only find the one marked "H" (high?). Should be a High and Lower valve. Where is the Low pressure valve so I can check my AC coolant? Edited June 7, 2014 by Sparktacus Link to post Share on other sites
Greg_E 211 Posted June 7, 2014 Share Posted June 7, 2014 I think it is up near the firewall, but don't remember exactly. I know it is definitely in the engine compartment and I've had a guage on mine in the past. Link to post Share on other sites
austex04 48 Posted June 8, 2014 Share Posted June 8, 2014 (edited) Please note the gauges on those cheap diy a/c recharge kits are horribly inaccurate. You should be using quality shop gauges that also measure the pressure on the high side. Edited June 8, 2014 by austex04 Smikster 1 Link to post Share on other sites
gsfdigital 0 Posted July 8, 2016 Share Posted July 8, 2016 what should the high readings be, what should the low readings be Link to post Share on other sites
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