No acceleration on low end, P1247 Code
Thread Starter
|
Mountain Pass
Joined: Jul 2004
Posts: 157
Likes: 1
No acceleration on low end, P1247 Code
I'm stumped hoping some of you can point to the fix. Read dozens of posts on various Web Forums and FB groups on the issue and seem to reading a magnitude of recommendations.
03' F350. I have no low end acceleration. Push the pedal down but it just does not have the get up and go it used to have. It's throwing a P1247 Code, (Tubo Boost Pressure Low)
Things that have been done recently, New Up Pipes, New exhaust, new tranny. Replaced the EBP and Tube. Replaced EBPV. (2) injectors replaced a year ago. No exhaust leaks coming into the turbo. No leaks on any boots. Has oil.
I have Forscan so what sensors should I set up on it to post back to these groups to narrow down the problem? Other recommendations to look for now. This is a truck we need to get back into service. Cheers and thanks for any helpful info.
03' F350. I have no low end acceleration. Push the pedal down but it just does not have the get up and go it used to have. It's throwing a P1247 Code, (Tubo Boost Pressure Low)
Things that have been done recently, New Up Pipes, New exhaust, new tranny. Replaced the EBP and Tube. Replaced EBPV. (2) injectors replaced a year ago. No exhaust leaks coming into the turbo. No leaks on any boots. Has oil.
I have Forscan so what sensors should I set up on it to post back to these groups to narrow down the problem? Other recommendations to look for now. This is a truck we need to get back into service. Cheers and thanks for any helpful info.
Got Data?
Joined: Dec 2012
Posts: 4,245
Likes: 1,375
From: Lake Stevens, WA
Check the hose between the MAP sensor and the intake spider - make sure it's intact and gently sloping from MAP sensor to intake. If it has a dip in it, it can trap oil and mess with the reading.
Monitor MAP and MGP (manifold gauge pressure, or boost) and see what they show during a spirited drive. On a stock 7.3L, MGP should play around 17-18psi at WOT.
While you're at it, monitor ICP and IPR% for their values at idle and WOT. I monitor several of these PIDs since it's pretty easy to set up. See the link below for a how-to with FORScan:
https://www.ford-trucks.com/forums/1...d-q-and-a.html
Monitor MAP and MGP (manifold gauge pressure, or boost) and see what they show during a spirited drive. On a stock 7.3L, MGP should play around 17-18psi at WOT.
While you're at it, monitor ICP and IPR% for their values at idle and WOT. I monitor several of these PIDs since it's pretty easy to set up. See the link below for a how-to with FORScan:
https://www.ford-trucks.com/forums/1...d-q-and-a.html
Lead Driver
Joined: Jul 2017
Posts: 6,854
Likes: 2,332
From: WV
Originally Posted by watersurgeon
No leaks on any boots.
Here is an example of a “good” test.
7.3 Powerstroke Good Boost Leak Test Reference
Any photos of the engine? Sometimes folks around here can spot something that’s been overlooked.
Might try a test run with the MAP sensor wire disconnected. I’ve read where this will “cure” it if there’s an issue with the sensor.
Thread
Thread Starter
Forum
Replies
Last Post
ColoradoFordBoys
1994.5 - 1997 7.3L Power Stroke Diesel
11
Jan 10, 2013 11:18 PM
