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Recently bought 1997 F250 diesel. Having problem soon after start up. Approx 30 sec's after starting I normally hear a pressure release sound for a few sec's, let it warm up a little and off and running. Over the last week or so the pressure release sound upon start up has been off and on. If I don't hear it the truck idles fine but under throttle a lot of hesitation. It slowly clears out. Truck may start and run fine or not, I never know what to expect. I put a new exhaust back pressure sensor in and still having same problem. Any help would be greatly appreciated
If it's at or below freezing then it's totally normal. The back pressure valve will stay closed depending on your throttle position untill the oil reaches the temperature required to turn it off. Don't let anyone talk you into unplugging it. You engine needs to run as warm as it can get.
well first off John!!!!!
WELCOME TO FTE!!!! These guys will straighten out! I could be wrong on this but if you unplug the EBPV I think it defaults to the open position. (If this in fact the problem). This may sound silly but if you are low on oil or have old oil in these trucks will not run right. How many miles do you have and where are you from (for climate conditions) and what mods do you have?
EDIT: after reading RR's post disregard the unplugging it part, lol
I live in CT on the shoreline. Temps have been 15 - 50 degrees over the last week, still had problem regardless of the weather. All fluids are at correct levels. When I replaced the EBP sensor the old sensor looked about half plugged. The vent tube has quite a bit of residue build up. What is the best way to clean it? or just replace it? Truck has 150,000 miles all stock, except K&N air filter.
I am not sure how to clean it but I will be watching for the answer to check/do mine as well. When the weather breaks I would install a Down Pipe (DP) and get rid of the K&N and go for the 6637 mod. Again welcome to the forum and remember you don'y have to be broken to hang out. Let us know what you find
I live in CT on the shoreline. Temps have been 15 - 50 degrees over the last week, still had problem regardless of the weather. All fluids are at correct levels. When I replaced the EBP sensor the old sensor looked about half plugged. The vent tube has quite a bit of residue build up. What is the best way to clean it? or just replace it? Truck has 150,000 miles all stock, except K&N air filter.
Most will take a strand of wire from a cable & chuck it up in a drill to run it through the tube , then ,maybe carb cleaner & compressed air ....