<!--[if !supportEmptyParas]-->Hi Folks, <!--[endif]--><o></o>

Maybe one or more of you fine people can help me out here.

I have a 96 F350 4x4 crew cab PSD 5 speed with 4:10 gears. The problem I am having goes as follows. When starting the truck after it has sat all day or all night for that matter. It has no power or acceleration for about the first half mile or less of driving. Then all of a sudden it will take off and run fine after that. It does this on a consistent basis. It is Ok upon starting only a couple hours of sitting. Just I would say 8 to 10 hours of not running.

The engine will rev up very slowly up to maybe 2,100 rpm tops and I can only get it up to 35 mph or so for that first half mile. It is doing this now, during the summer months when the whether is 80 degrees out. I don’t think it’s the EBPV, I know what that sounds like during the winter months. The engine from what I can tell does not sound like that. I could be wrong though.

Just as a little side note. If I unplug the MAP sensor then the truck runs fine and appears to not have that problem. It actually runs better and is stronger off the line than even before I had this problem. I replaced the MAP sensor, but that did not solve the problem. I’m looking for some ideas here before I break down and go to the dealer. They seem to be the only ones who have a scanner that will read the codes on this thing. I have been checking with local garages to find someone who has a code scanner that will read the codes from the computer on a PSD, but so far no luck. It wouldn’t be a problem if the PSD was OBD-2 compliant which it’s not. Acctron claims to have a code scanner that will read the PSD codes. I had my friend who is the manager at my local AutoZone store hook the one up they have that Acctron says is supposed to work. We can’t even get it to link up and communicate to the onboard computer. So much for Acctron.

 

Ive always started my rigs 15-20 min. before I use them unless I had to go immidiatly. My 75' f-250 and my 86" when I had them (gasers) were not happy unless warmed up. I have'nt just jumped in my 2000 and tryed to drive off but if it is like any other ford Ive owned, a warm up period is a good thing and not just fords. I think any rig should warm up before its drivin if you have the time to do it. Warming up gets the rig up to temp without load and I think extends the life of the moter in the long haul. Just my opinion.

 

I usaully do let it idle a few minutes. But this problem is out of the normal operation of this motor. This is something that has started recently. It acts like the EBPV is closed, but like I said the motor just doesn't sound like it. You can put the pedal to the floor and it just rolls over and says rub my belly. Then after a few blocks down the road, it's ready to go chase a stick. I,ve only had it do that on the coldest of winter days when the EBPV was closed and I could tell it was closed, cause the motor had that hollow muffled sound. The truck has 165 rounds on it by the way.

 

Fuel filter fresh?

 

You might want to check the exhaust back pressure sensor and tube. If the tube gets clogged, the sensor doesn't get the right signal.

 

injectors when oil is cold if you have a flat spot at high rpm your injectors are getting weak

 

That was the first thing I checked. When you first start it, it cycles closed and after 30 seconds or less it opens.

Well just as an update the truck went into the shop last week. After changing the fuel filter and air filter, I started it and let it idle. It ran for about 4 or 5 minutes, then sputtered a few times and quit and wouldn't restart. First thing I thought was the CAM sensor, since I had it replaced twice before. I picked one up and replaced it myself. That didn't do it. I had it towed to the local Ford shop. Fuel vacuum sensor, injector pressure regulator and a short in the injector wiring harness. It now runs again but the previous problem still exsist. Engine is strong after that 1/2 mile or so and is strong all the way up to 3400 RPM. Don't know what the MPH is since the speedo stops at just over 90. I'm not to happy with the dealer right now and I don't want to take it back there just yet if at all because they didn't road test the thing after fixing it. If they would have road tested it, they would have noticed the power lag and would have redone the diagostic on it. I'm just happy it's running again. I told them about this problem, they said I could bring it back in again and they would redo the diag. on it. I asked if I would have to put out another $125 for the diag. They said they might be able to wave it, maybe. There's more to this service story than what I'm telling you guys, that's why I'm kinda reluctant to go back there.
Just a thought, what about the EOT sensor. Would that have something to do with it. I know as I stated before, if I unplug the MAP sensor then it's just fine. Matter of fact the truck runs better and the turbo seems to come on sooner. And yes I replaced the MAP sensor. That wasn't it either.

 

Have you checked the fuel pressure and the high pressure oil pump?

 

Before you start the engine, when it is cold, inspect the turbo and see if it spins free. When you start the engine cold check the EBPV to see if it is open or closed position. Remove and inspect various engine connectors and check for corrosion and burnt connections. It sounds like the type of engine performance you get in cold weather when the EBPV is closed.

 

I'm very interested in this problem. My '99 350 CC seems to be doing close to the samething. However, it is an automatic. But upon start up I have NO power for the first 100 ft up to half a block and then it runs just fine. I was growing concern that it might be a tranny problem. But this problem sounds alot more like what I'm experiencing.

 

That was the reason for the replacement of the injector pressure regulator. On my first TC to the dealer they stated they couldn't get 400 lbs pressure to the injector gallery. I asked if the high pressure pump was bad. They said no that checked out fine. That's when I suggested the IPR to them, which they then checked and found was faulty. Who's sposed to be doin the diag. here, ME or THEM!?

 

That was like I stated earilier what I first thought it was. When first starting the motor, the EBPV cycles closed like it's supposed to. Then within 30 seconds or less, it opens, as it is supossed to. It has to be something sensor related somewhere, that is also tied in with the MAP sensor. Having the truck stand all day or all night and unplugging the MAP sensor before starting, the truck behaives just fine. I usually wait for the glow plugs to stop cycling before taking off. With the MAP unplugged, acceleration is not a problem what so ever. I don't want to run it very long like that because the MAP is supposed to regulate boost and fuel mixture.

 

My 95 does the exact same thing. When it is really cold outside and it has sat for 8-10 hours it will start right up but just won't accelerate for about 1/2 mile or so. I don't understand all the acronyms that were in this thread i.e. EBPV,MAP,EOT,IPR. Please educate me so I can understand the sequence of what is going on with your truck. thanks

 

EBPV= Exhaust By Pass valve
MAP = Manifold Absolute Pressure Sensor
EOT = Engine Oil Temperature
IPR = Injector pressure regulator

Am interested in the solution as that may be my problem too.

 

I have a 2002 psd auto tranny, My truck never had this problem until the dealer put a new TPS sensor on the truck. Now it has no power for the first 5 min of warm up. I really think its a tps thing/problem...I will get to the bottom of this and post a reply asap..