sulaco83
Member
- Joined
- August 17, 2013
- Messages
- 40
- Reaction score
- 0
- City, State
- West Norriton, PA
- Year, Model & Trim Level
- 1998 Eddie Bauer 5.0 AWD
Ever since I picked my 5.0 EB up over the summer, I've been struggling with the EGR system. I realized shortly after picking it up that someone had messed with the system since the green vacuum line coming from the EGR valve had been disconnected and plugged with a bolt. After reattaching, the truck promptly threw a P0401 code. I replaced the DPFE sensor which fixed that problem, but ever since I have been getting a ticking sound when under load and twice over the last 2 weeks I have gotten a P0402 code (EGR Excessive Flow).
Unlike most of the other posts I have seen, the truck does NOT tick when cold, but only begins to tick (at least as far as I can tell) when it has warmed up. This seems strange and sort of the opposite of the way exhaust leak noises are supposed to work. My local mechanic checked the truck out and couldn't find any sign of a leak. It runs absolutely fine but the noise and occasional CELs are starting to get on my nerves.
My guess is it has something to do with the EGR tube or maybe even the valve, but I was wondering based on the symptoms if someone could tell me which is the more likely problem? I would think if it was a cracked header it would be ticking worse when cold, not when warm.
Unlike most of the other posts I have seen, the truck does NOT tick when cold, but only begins to tick (at least as far as I can tell) when it has warmed up. This seems strange and sort of the opposite of the way exhaust leak noises are supposed to work. My local mechanic checked the truck out and couldn't find any sign of a leak. It runs absolutely fine but the noise and occasional CELs are starting to get on my nerves.
My guess is it has something to do with the EGR tube or maybe even the valve, but I was wondering based on the symptoms if someone could tell me which is the more likely problem? I would think if it was a cracked header it would be ticking worse when cold, not when warm.