Hey guys, I have a 07 Ford Ranger with the DOHC 2.3 and 5 spd manual trans currently at 90k km. When I start the truck today I notice the whole truck is vibrating/shaking at idle. The vibration is at worst around 1000 RPM and goes away after 1500 RPM. There are no check engine lights or codes, and no funny smokes coming out of the exhaust. The only thing I noticed is a very slight knocking sound coming from underneath the truck near the firewall, but that could be the known exhaust leak near the cat. I know this engine is known to have some vibration but this is abnormal. The truck is in winter storage right now and I start it up to let it warm up once or twice per month. Last time when it was running everything is normal. Before I put it into storage back in October I added fresh gas and fuel stabilizer. I did this every winter and never had a problem with it. I'm a little bit lost here so any help would be greatly appreciated, thanks.