boost falls wot when shifting - Ford Powerstroke Diesel Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 20 Old 06-23-2012, 10:00 AM Thread Starter
Compression Ignition Addict
 
JPilkinton's Avatar
 
Join Date: Mar 2011
Posts: 247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
boost falls wot when shifting

Ok boys finally got me some gauges.. yes they are glowshift and i know they arn't the best but i just cant foot $15o plus for a single gauge from isspro at the moment...

but real question is when i am at WOT i hit about 18psi and drops below 15psi to about 10-11psi as it shifts and has to climb back up to 15psi while at WOT is this normal or what? doesn't seem right to me at all shouldnt it stay at a consistant boost the whole time at WOT, and during WOT it was about 850-950* egt seems really high for stock

and the truck has DIY-6637,3.5" exhaust banks, ccv mod

any input greatly appreciated!
JPilkinton is offline  
post #2 of 20 Old 06-23-2012, 10:19 AM
Compression Ignition Addict
 
Joeshu1000's Avatar
 
Join Date: Feb 2011
Posts: 198
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 3
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Sounds like your turbo needs to be taken out and cleaned or you might have a boost leak some where. Stock tune I have hit 1000 degrees before. I also have Glowshift gauges and have good luck with them.

Joe

2006 F350 XLT CrewCab 4X4
325/65R18
EGR Delete
Zoodad Mod
High-Idle Mod
Sinister Coolant Filter
ARP Head Studs W/ OEM Gaskets (Installed myself)
Upgraded Fuel Spring
Updated STC Fitting
Updated Oil Cooler Screen
Updated Dummy Plugs/Standpipes
6.4L Banjo Bolts
PHP Ficm Tuner
1/4 Mile 14.2 @ 93MPH

SCT Custom Tunes: MKM, Looney, SRL, SRLXX, Wildman and SPD w/ Early Lock up
Joeshu1000 is offline  
post #3 of 20 Old 06-23-2012, 10:34 AM Thread Starter
Compression Ignition Addict
 
JPilkinton's Avatar
 
Join Date: Mar 2011
Posts: 247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
so pretty much turbo rebuild? and a 1000* thats alot thought our trucks were not suppose to reach anything over 1250*!? thats not far from 1000*
JPilkinton is offline  
post #4 of 20 Old 06-23-2012, 10:41 AM
Compression Ignition Addict
 
Joeshu1000's Avatar
 
Join Date: Feb 2011
Posts: 198
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 3
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I've seen upwards of 1500 degrees with the looney tune. Of course, I don't let it sit there for too long. It does sound like a turbo issue. I cleaned my turbo when I put in my EGR delete in. My turbo was working fine, but it needed some cleaning. Hopefully someone else will chime in who is smarter than me.

Joe

2006 F350 XLT CrewCab 4X4
325/65R18
EGR Delete
Zoodad Mod
High-Idle Mod
Sinister Coolant Filter
ARP Head Studs W/ OEM Gaskets (Installed myself)
Upgraded Fuel Spring
Updated STC Fitting
Updated Oil Cooler Screen
Updated Dummy Plugs/Standpipes
6.4L Banjo Bolts
PHP Ficm Tuner
1/4 Mile 14.2 @ 93MPH

SCT Custom Tunes: MKM, Looney, SRL, SRLXX, Wildman and SPD w/ Early Lock up
Joeshu1000 is offline  
post #5 of 20 Old 06-23-2012, 10:44 AM Thread Starter
Compression Ignition Addict
 
JPilkinton's Avatar
 
Join Date: Mar 2011
Posts: 247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
yeah it probably is turbo i do have 194K miles on the o'l ford lol
JPilkinton is offline  
post #6 of 20 Old 06-23-2012, 10:48 AM
Compression Ignition Addict
 
jesilvas's Avatar
 
Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,148
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 27 Times in 25 Posts
Feedback Score: 0 reviews

You do no clean a 7.3 stock turbo. Or any non VGT turbo for that matter.
Are those boost readings under a locked TC or not?
Also, where is the probe for the EGT and what was the ambient temp?



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
jesilvas is offline  
post #7 of 20 Old 06-23-2012, 10:52 AM Thread Starter
Compression Ignition Addict
 
JPilkinton's Avatar
 
Join Date: Mar 2011
Posts: 247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
egt prob is on the left side mani at the rear of the mani. and normal driving temps was like 400-600*nothing high at all. and TC locked idk??? tow haul was off lol?
JPilkinton is offline  
post #8 of 20 Old 06-23-2012, 10:57 AM
Compression Ignition Addict
 
blue99stroker's Avatar
 
Join Date: Oct 2011
Location: Chico, California
Posts: 4,812
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Thanks: 18
Thanked 188 Times in 180 Posts
Feedback Score: 0 reviews
your boost numbers dont sound to off mark. especially since you are at stock programming.
your egts do seem a tad bit high although you could have a slight boost leak. i think 900 degrees is abut the highest temp you should get stock.

99.5 f250 7.3 4x4 257k
PHP Phoenix, S&B CAI, 4" TBE, Hpx, Stancor, RR Billet Wheel, AIH Delete, Autometer Gauges, Leveling kit, Transgo kit, Warn Hubs, Int'l Up-Pipes, RR IC Boots, Non-Ebpv Pedestal, High Flow Outlet, RR OCR, 08 Tow Mirrors.

Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, AIH Delete, 6637, 4" TBE, BD Billet Wheel, TruCool Max

Last edited by blue99stroker; 06-23-2012 at 11:01 AM. Reason: change
blue99stroker is offline  
post #9 of 20 Old 06-23-2012, 10:58 AM Thread Starter
Compression Ignition Addict
 
JPilkinton's Avatar
 
Join Date: Mar 2011
Posts: 247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
yeah i was just concerned when it was shifting it dropped so low like 10psi and had to climb back up to 15-16psi that seemed little weird
JPilkinton is offline  
post #10 of 20 Old 06-23-2012, 11:15 AM
Compression Ignition Addict
 
blue99stroker's Avatar
 
Join Date: Oct 2011
Location: Chico, California
Posts: 4,812
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Thanks: 18
Thanked 188 Times in 180 Posts
Feedback Score: 0 reviews
your driving temps are were they should be. ive never floored it and looked at boost on stock programming so im not sure if yours is normal. but 15 psi is pretty good for stock programming. 17 psi is about as high as you will get stock

99.5 f250 7.3 4x4 257k
PHP Phoenix, S&B CAI, 4" TBE, Hpx, Stancor, RR Billet Wheel, AIH Delete, Autometer Gauges, Leveling kit, Transgo kit, Warn Hubs, Int'l Up-Pipes, RR IC Boots, Non-Ebpv Pedestal, High Flow Outlet, RR OCR, 08 Tow Mirrors.

Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, AIH Delete, 6637, 4" TBE, BD Billet Wheel, TruCool Max
blue99stroker is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome