Having problems with your 2004 Kia Rio ?
Misfire #4 low pressure in #4 about 90 did leak down only 6 percent lost in all 4 cylinders checked timing and air intake system plugs and wires coil in process of checking ckps and cmp and fuel system
The 90 PSI cylinder pressure is the cause of the miss. You must have a leaking valve.
Repair Help & Product Troubleshooting for 2004 Kia Rio
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