Attention: TDR Forum Junkies I finally went over 300k this week, but it wasn't easy. Since right before Christmas I have basically replaced the entire fuel system, some of it more than once.
In Dec. I replaced the lift pump with the one that is in the tank. I am not impressed, this also screwed up the fuel gauge, I now run out of fuel at around 3/8 of a tank. Dodge won't fix it, say it isn't their fault.
In early Jan. I replaced the CP3, then the high pressure relief valve on the rail. I put a fuel pressure gauge on right after that. Anyone else have problems with low (read that no) fuel pressure after you get below half a tank? I had Dodge check the lift pump and they say it is putting out what it is supposed to. After I run for 3 or 4 hours I have 0 fuel pressure. Dodge says that it is the volume that counts, not pressure. Not buying it, as far as I'm concerned, no pressure, no fuel. I put an auxiliary lift pump on, now I have fuel pressure. 16 lbs. minimum.
First part of April, I lose the high pressure relief valve again. Not covered under warranty, 12 month, 12,000 miles. I had gone over 14,000 miles. I removed my Edge EZ, don't know if it had anything to do with it, but it is off and will stay off. The valve was replaced and things seemed OK for a few weeks, then the truck was getting hard to start with long cranking times and also what I considered to be injector knock. Everything was checked out by Dodge and was good to go as far as they were concerned. It got worse and finally the truck wouldn't start at all. Got towed to the dealer and was told it was the relief valve again, at least this time it was under warranty, just 6000 miles on it. It was replaced again but the truck still was hard to start, long cranking times, I'm talking 15-30 seconds. (good on the starter) They said the injectors were firing like they were supposed to. I told them I wanted to replace them anyway then I found out what they cost at the dealer. I got them directly from Cummins, had them put in at an independent shop, saved almost $250 a hole on parts and a lot more on labor and now have what seems like a new truck.
I'll end this by saying that regardless of what some people say, and I won't name names, you do need a fuel pressure gauge in third gen trucks, and also the in tank pump isn't what it is cracked up to be. The engine on these trucks is pretty much bullet proof, but the fuel system sucks. 300,000+ miles and the engine uses no oil and now that the fuel system is fixed, runs and pulls like a new one. I hope to get another 300K out of it now that I know what to watch for.
In Dec. I replaced the lift pump with the one that is in the tank. I am not impressed, this also screwed up the fuel gauge, I now run out of fuel at around 3/8 of a tank. Dodge won't fix it, say it isn't their fault.
In early Jan. I replaced the CP3, then the high pressure relief valve on the rail. I put a fuel pressure gauge on right after that. Anyone else have problems with low (read that no) fuel pressure after you get below half a tank? I had Dodge check the lift pump and they say it is putting out what it is supposed to. After I run for 3 or 4 hours I have 0 fuel pressure. Dodge says that it is the volume that counts, not pressure. Not buying it, as far as I'm concerned, no pressure, no fuel. I put an auxiliary lift pump on, now I have fuel pressure. 16 lbs. minimum.
First part of April, I lose the high pressure relief valve again. Not covered under warranty, 12 month, 12,000 miles. I had gone over 14,000 miles. I removed my Edge EZ, don't know if it had anything to do with it, but it is off and will stay off. The valve was replaced and things seemed OK for a few weeks, then the truck was getting hard to start with long cranking times and also what I considered to be injector knock. Everything was checked out by Dodge and was good to go as far as they were concerned. It got worse and finally the truck wouldn't start at all. Got towed to the dealer and was told it was the relief valve again, at least this time it was under warranty, just 6000 miles on it. It was replaced again but the truck still was hard to start, long cranking times, I'm talking 15-30 seconds. (good on the starter) They said the injectors were firing like they were supposed to. I told them I wanted to replace them anyway then I found out what they cost at the dealer. I got them directly from Cummins, had them put in at an independent shop, saved almost $250 a hole on parts and a lot more on labor and now have what seems like a new truck.
I'll end this by saying that regardless of what some people say, and I won't name names, you do need a fuel pressure gauge in third gen trucks, and also the in tank pump isn't what it is cracked up to be. The engine on these trucks is pretty much bullet proof, but the fuel system sucks. 300,000+ miles and the engine uses no oil and now that the fuel system is fixed, runs and pulls like a new one. I hope to get another 300K out of it now that I know what to watch for.
