Fuel

mextexros · #1 (**permalink**) 02-23-2008, 12:20 PM

I’m a new member of this site and looking for help with my 2002 F-250 , This truck is been good over all I just started having problems with it. My problem: I start my truck to start the day. The truck starts fine no problems. Once you depress pedal it starts to ideal rough like it is running out of fuel and will stall if you continue to depress pedal. The fuel filter is new. When the engine comes up to temperature you have no more problems during the day as long as the engine temperature is up. This condition only exists when the engine is cold. I have a fuel heater in the filter housing could it be my problem. Not heating the fuel during startup. I don’t know why the engine runs fine at all speeds after it is warmed up. Can someone help?

Pocket · #2 (**permalink**) 02-23-2008, 11:03 PM

Your exhaust backpressure valve (EBPV) is activating like it should in cold weather when the engine is cold. The problem is that the valve is controlled by a backpressure sensor. This sensor is located in the front of the engine (behind the tensioner pully) and sees exhaust backpressure via a tube running from the exhaust manifold on the passenger's side. This tube gets clogged with soot, resulting in a sensor that can no longer see proper backpressure, and the valve stays closed while accelerating. Here is a link with step-by-step instructions to fix the problem: http://guzzle.rbmicro.com/ebps.html

randomhero1172 · #3 (**permalink**) 02-24-2008, 11:02 PM

How cold? How long do you let it warm up? How many miles on it?

I know when it gets really cold her in MI it will not rev above 1700 or so when started. It shows the same symptoms yours does, when you let it warm up for 10 minutes or so it acts just fine. Ya know how much diesels like when they get cold started and told to GO GO GO