Bought an 03 3 months ago. Wasn't running. Replaced tires,starter,air bags,pcv valve and fuel filter. Changed oil and antifreeze. Removed old fuel from tank and line, removed plugs (looked good) cleaned coil boots and plug wells. Drove it for the 1st time yesterday. Has a noticeable tick at idle coming from the passenger head and timing cover area. Doesn't idle very good at stop lights either but never stalled. Misses intermittently at idle,more so on right bank. Didn't floor it once on test drive but was impressed with how much power it had. Put a 100K on it yesterday to check for any other issues and no error codes yet. It's a Canadian marauder with 170,000 kilometres. Any ideas or suggestions?