I just recently changed my Glow Plug Relay and at times the starting the truck gets wierd. Sometimes when i start the truck it sounds like the starter or something is not engaging. Most of the time it will start up normally with no problems, but about 1/5 times it will turn over funny. I have tightened the relay and elctronics. I looked at the starter didn't see any problems. The starter is only 10,000 miles old. practically brand new. The problem started when i changed the relay. Any suggestions?