I have a 1986 Ford Econoline 350 with a 460 engine. It is a motorhome with approximately 37,000 miles. It starts good, it runs good most of the time but sometimes when I come to a stop the engine is shaking and rocking real bad, it feels like it wants to shut off. I ignore it and drive on and it seems to go away. Sometimes when I'm actually up to crusing speed of 55 mph I feel a slight surge. Lately it will idle ok and accelerate ok but when I'm driving between 10-20 mph I can now feel the surging has intensified. When I took the vacuum line off of the EGR valve and put another vacuum hose onto the actual hose that I took off of the EGR the engine RPM went up and smoothed out. Understand I was only touching the tips of the rubber hoses together when this happened, the EGR valve was not connected at all. I'm confused I'll take anything you got.
P.S. When I put the same live vacum hose to the EGR valve, it shut the engine off.
have the same problem?
Monday, September 3rd, 2007 AT 2:35 AM