The issue you're experiencing with your .75 inch Irvine roller shade springs likely stems from the tension balance and potentially the stoppers. The slow-rise premium roller shades require precise spring tension to hold the shade at any position. If the springs are too tight, the shade rises too quickly or won’t stay down; too loose, and it won’t rise properly. Since you have adjusted tension without success, it's possible the springs you received are not the exact match for your shade’s mechanism or the stoppers are worn or incompatible. Replacement springs must match the exact tube diameter and tension rating specified for your model. Additionally, stoppers play a crucial role in holding the shade in place. We recommend verifying the spring part number matches the .75 inch tube and consulting the manufacturer’s specifications for your 2023 Jayco Pinnacle’s shade model. If springs are confirmed correct, inspect or replace the stoppers as they may be preventing proper operation. For best results, contact Irvine with your shade’s model details or consider sending photos for expert assessment.