Bucking when cold
Posting Guru
Joined: Nov 2003
Posts: 1,949
Likes: 0
From: Near DC
I thoroughly cleaned the ICP connections and am still having the problem.
Do I get to the screen by removing the T-25 screws?
Is that where the spring is?
Do I get to the screen by removing the T-25 screws?
Is that where the spring is?
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
Pull your fuel filter out and you can clean the screen from inside the fuel bowl. There is a hole in the right hand side towards the top going to the FPR. The screen is in there. Use a mirror and a flash light to look in the hole. I break the cotton ends off of Q tips and use the Q tip stick to clean the screen. Be gentle, don't break the screen.
Posting Guru
Joined: Nov 2003
Posts: 1,949
Likes: 0
From: Near DC
Now I see a problem...
Don't know how I got in the wrong year range thread, must have been from doing a search.
The 99.5 and up years don't have a FPR screen.
But what the heck, I'll stick a Q-Tip in there anyway, LOL!
Do any of you have a leak at the fuel bowl drain?
I do, maybe it's sucking air?
I know, just pulling straws here....
But whatever it is, it seems to span many year models...
Don't know how I got in the wrong year range thread, must have been from doing a search.
The 99.5 and up years don't have a FPR screen.
But what the heck, I'll stick a Q-Tip in there anyway, LOL!
Do any of you have a leak at the fuel bowl drain?
I do, maybe it's sucking air?
I know, just pulling straws here....
But whatever it is, it seems to span many year models...
More Turbo
Joined: Sep 2002
Posts: 515
Likes: 1
From: Windsor, CO
Did you ever get this handled?
I'm having a similar issue only when cold out. It really only does it on the first run each day. After that it never does it again, no matter what the temp. I have new injectors, new ICP, new IPR, new glow plugs, GPR, etc.
previous owner said its done it as long as he can remember, but only for the first drive each morning. Once it sits for 5min it never does it again.
The buck is literally a 1/2 second long, but its really annoying. It only does it under steady light throttle. It never does it under decel or harder accel.
I'm having a similar issue only when cold out. It really only does it on the first run each day. After that it never does it again, no matter what the temp. I have new injectors, new ICP, new IPR, new glow plugs, GPR, etc.
previous owner said its done it as long as he can remember, but only for the first drive each morning. Once it sits for 5min it never does it again.
The buck is literally a 1/2 second long, but its really annoying. It only does it under steady light throttle. It never does it under decel or harder accel.
Thread Starter
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Lead Driver
Joined: Oct 2010
Posts: 5,132
Likes: 45
From: Columbus, Oh
Did you ever get this handled?
I'm having a similar issue only when cold out. It really only does it on the first run each day. After that it never does it again, no matter what the temp. I have new injectors, new ICP, new IPR, new glow plugs, GPR, etc.
previous owner said its done it as long as he can remember, but only for the first drive each morning. Once it sits for 5min it never does it again.
The buck is literally a 1/2 second long, but its really annoying. It only does it under steady light throttle. It never does it under decel or harder accel.
I'm having a similar issue only when cold out. It really only does it on the first run each day. After that it never does it again, no matter what the temp. I have new injectors, new ICP, new IPR, new glow plugs, GPR, etc.
previous owner said its done it as long as he can remember, but only for the first drive each morning. Once it sits for 5min it never does it again.
The buck is literally a 1/2 second long, but its really annoying. It only does it under steady light throttle. It never does it under decel or harder accel.
More Turbo
Joined: Sep 2002
Posts: 515
Likes: 1
From: Windsor, CO
I haven't touched my EBPV at all. I wonder if it could have something to do with it.
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More Turbo
Joined: Sep 2002
Posts: 515
Likes: 1
From: Windsor, CO
It only really does it when the temps drop below freezing. Which is pretty much every day now.
Thread Starter
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Lead Driver
Joined: Oct 2010
Posts: 5,132
Likes: 45
From: Columbus, Oh
I could understand that if it got better as it warmed up though. This occurs the entire 14mi drive to work. Halfway there I am up to normal operating temp but it does it all the way there. Then I can shut the motor down for a minute or two and its like it resets itself. Then its good to go for the rest of the day.
It only really does it when the temps drop below freezing. Which is pretty much every day now.
It only really does it when the temps drop below freezing. Which is pretty much every day now.
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
I could understand that if it got better as it warmed up though. This occurs the entire 14mi drive to work. Halfway there I am up to normal operating temp but it does it all the way there. Then I can shut the motor down for a minute or two and its like it resets itself. Then its good to go for the rest of the day.
It only really does it when the temps drop below freezing. Which is pretty much every day now.
It only really does it when the temps drop below freezing. Which is pretty much every day now.
When you first start the engine the PCM will cycle the EBPV and measure back pressure (EBP sensor) to verify it is working. With the EBPV unplugged the PCM will detect no back pressure and disable the function for the duration of the driving cycle. Once the EBPV is operational it stays that way until EOT is above 175*. Driving with OEM thermostat it's tough to get temps up that high, especially in the winter, that is why the 203* helps with the issue. Here is the kicker though ... if you shut down the engine, restart and EOT is 135* or above the PCM does not cycle the EBPV, it does not care at that temp so the problem goes away.
More Turbo
Joined: Sep 2002
Posts: 515
Likes: 1
From: Windsor, CO
Sounds like the EBPV is closing attempting to rapid warm up the engine. If you don't know what it is doing it can be quite concerning. You can unplug the EBPV to verify, located just in front and below the turbo, a two wire plug.
When you first start the engine the PCM will cycle the EBPV and measure back pressure (EBP sensor) to verify it is working. With the EBPV unplugged the PCM will detect no back pressure and disable the function for the duration of the driving cycle. Once the EBPV is operational it stays that way until EOT is above 175*. Driving with OEM thermostat it's tough to get temps up that high, especially in the winter, that is why the 203* helps with the issue. Here is the kicker though ... if you shut down the engine, restart and EOT is 135* or above the PCM does not cycle the EBPV, it does not care at that temp so the problem goes away.
When you first start the engine the PCM will cycle the EBPV and measure back pressure (EBP sensor) to verify it is working. With the EBPV unplugged the PCM will detect no back pressure and disable the function for the duration of the driving cycle. Once the EBPV is operational it stays that way until EOT is above 175*. Driving with OEM thermostat it's tough to get temps up that high, especially in the winter, that is why the 203* helps with the issue. Here is the kicker though ... if you shut down the engine, restart and EOT is 135* or above the PCM does not cycle the EBPV, it does not care at that temp so the problem goes away.
I will say that its VERY annoying trying to drop the kids off at school in the morning.
More Turbo
Joined: Sep 2002
Posts: 515
Likes: 1
From: Windsor, CO
I will unplug it and see if it helps. It did its all the way to the shop again today. Even once completely warmed up. But, now that its here today, it will not do it again all day. So, I should be able to tell more in the AM.
I will say that its VERY annoying trying to drop the kids off at school in the morning.
I will say that its VERY annoying trying to drop the kids off at school in the morning.
When the CEL came on it had very little power. Then reset itself somehow and it was okay. Then about 1/2 mile from my shop the truck completely died on me. Again CPS. But, after a couple minutes it restarted and I drove it to the shop. I will be swapping the CPS today with a Ford one and checking the wiring harness for signs of wear/burnt wires.