The company I work for bought 4 Landmaster L4's. They have been here for about a year; I am the tech that works on them. One started bogging down under anything over half throttle, I checked everything I possibly could think to check before finally breaking the engine down and find that the intake cam was worn almost completely to no lobe at all. Last week another unit started running poorly until the throttle no longer responds. I can't seem to find anything that would make this happen, I am working on having the company obtain a tiny scan to be able to access any fault codes, but so far everything electrical seems to be doing what it should be. They both have the Vanguard engine. Any tips to figuring out the one, and tips or tricks to help me keep the other running?
Thank you for your time.
