Go Back   Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel
Sign in using an external account
Register Forgot Password?


1999 - 2003 7.3L Power Stroke Diesel SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-20-2012, 08:36 PM
TheTinian's Avatar
TheTinian TheTinian is offline
Posting Guru
 
Join Date: Apr 2006
Location: Fl
Posts: 1,212
TheTinian is gaining momentum as a positive member of FTE.TheTinian is gaining momentum as a positive member of FTE.
7.3 low boost and drop in mpg

Ive got a 01 7.3 4x4 with 222k on it. Recently my mpg has dropped from a average of 14-15 to maybe 9-10. I noticed that crusing speed (50-55 mph) that my boost gauge is barely reading anything. I went through today and checked all the boots and retightened all the clamps on my pipes. Went for a drive and stayed around 2-3lbs @50. That seems pretty low to me still.
I can turn my programmer up and floor it and it will jump up to 26-27 lbs, but qucikly drop once i let off.

Any ideas what to do next?
Reply With Quote
  #2  
Old 04-21-2012, 06:58 AM
F350-6's Avatar
F350-6 F350-6 is offline
Post Fiend
 
Join Date: Mar 2007
Location: Texas
Posts: 23,731
F350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputation
Make you a boost leak detector. Go to the hardware store and buy you a 3" PVC end cap, and if you don't already have them, a threaded fitting that you can snap an air hose into and a tap so you can screw the fitting in.

The OD of the end cap is 4", so undo the end of your air intake line and stick the end cap in the hose and clamp it in place using the factory hose clamp. Then hook up an air compressor with the pressure regulated down to 5 - 10 psi. Spray all your connections or any suspect leak locations with soapy water and look for your boost leak.
__________________
Chris
2002 F350 6-speed 444 CID. XLT, Heated Seat, 485,000 & counting.
RHN Mods & Maintenance

“Good judgment comes from experience, and a lot of that comes from bad judgment.” Will Rogers
Reply With Quote
  #3  
Old 04-21-2012, 08:35 AM
miller_feed's Avatar
miller_feed miller_feed is offline
Hook it, I'll pull it.
 
Join Date: May 2007
Location: Grand Lake, La.
Posts: 15,009
miller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputation
2-3 # boost at 50 is about right. The boost falling off when you get out of it is normal. The amount of boost you get at WOT is great.

I don't see a problem with your boost.
__________________
RICK, PAA MEMBER #4
2001, F-350, DRW. CC. LWB, 4X4, LARIAT,
MODS: 6637 W/Pete's cover, BTS-TRANS, DP-TUNER LIVE, MBRP 4" SS, Isspro 3 gauge kit, TN-BB turbo, Bellowed up pipes, HPX, TRU-COOL cooler, SS Stage II injectors, and the Chris-fifty.
Reply With Quote
  #4  
Old 04-21-2012, 08:49 AM
Tugly's Avatar
Tugly Tugly is offline
I'm a cautionary tale
 
Join Date: Jan 2011
Location: Central Washington
Posts: 9,480
Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.Tugly has a spectacular reputation.
That MPG completely sucks. I wouldn't rule out exhaust leaks on your manifolds, ups, and collector - I'd go on soot safari.

The last link in my sig might help.
Reply With Quote
  #5  
Old 04-21-2012, 11:50 PM
powerstroke72's Avatar
powerstroke72 powerstroke72 is offline
Super Moderator
 
Join Date: Oct 2005
Location: SW Virginia
Posts: 23,362
powerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputationpowerstroke72 has a superb reputation
Moved to the 1999 - 2003 7.3L Power Stroke Diesel forum.
__________________
John
2013 Jeep Wrangler Unlimited Rubicon 10th Anniversary Edition, Black / Black Leather
2013 Ford Taurus SHO, Tuxedo Black / Black Leather
2011 F-350 4x4 Lariat Ultimate, Oxford White / Pale Adobe 6.7L PSD 3.55 ELD / Gone but not forgotten.
Moderators, Guidelines, and How They are Enforced / FTE Forum Guidelines

RIP Steve (Bricks) Price........Godspeed my good friend. RIP Paul / Hdslider.....you are truly missed.
Reply With Quote
  #6  
Old 04-22-2012, 07:56 PM
TheTinian's Avatar
TheTinian TheTinian is offline
Posting Guru
 
Join Date: Apr 2006
Location: Fl
Posts: 1,212
TheTinian is gaining momentum as a positive member of FTE.TheTinian is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by miller_feed View Post
2-3 # boost at 50 is about right. The boost falling off when you get out of it is normal. The amount of boost you get at WOT is great.

I don't see a problem with your boost.
It was at 0 before I tightened everything. It just still seemed low to me, but if its normal than i guess its all good.
Reply With Quote
  #7  
Old 04-23-2012, 08:11 AM
miller_feed's Avatar
miller_feed miller_feed is offline
Hook it, I'll pull it.
 
Join Date: May 2007
Location: Grand Lake, La.
Posts: 15,009
miller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputationmiller_feed has a superb reputation
Quote:
Originally Posted by TheTinian View Post
It was at 0 before I tightened everything. It just still seemed low to me, but if its normal than i guess its all good.
I blew a boot off before and drove 50 mph for 3 miles to get back to my shop with the boot completely off. So 2-3 # boost is good for 50 mph.
__________________
RICK, PAA MEMBER #4
2001, F-350, DRW. CC. LWB, 4X4, LARIAT,
MODS: 6637 W/Pete's cover, BTS-TRANS, DP-TUNER LIVE, MBRP 4" SS, Isspro 3 gauge kit, TN-BB turbo, Bellowed up pipes, HPX, TRU-COOL cooler, SS Stage II injectors, and the Chris-fifty.
Reply With Quote
Old 04-23-2012, 08:11 AM
Reply

Go Back   Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel

Tags
73, average, boost, chip, f550, ford, gallon, hose, loss, low, manifold, mile, power, powerstroke, reading

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 03:16 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup