Filling R134A should I be at idle? or what rmp?

[thepope]

so its kinda a long story but last year a hose leaked out the r134a out. I got a fancy gauge and vacuum pump. I replaced the hose. put a vacuum on the system. put in one can. can tap broke on the second can. ($2 ebay special) Left it till spring. probably not necessary to explain all that but now ya know.

any way I found a temperature / pressure chart online so I was going to fill it according to the temperature.

Just wondering if I should fill it at idle or at a certain rpm. my truck idles at about 500 rpms.

if it matters my truck is a 1998 gmc k1500 5.7L

Thank you for your time.

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[EricTheCarGuy]

It seems like you guys have this one handled, well done. Keep us posted on the fix.

[Author]

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