Engine running weird / strange - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-17-2012, 11:54 AM
Member
 

Join Date: Aug 2011
Location: Bay Area, CA
Posts: 57
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Engine running weird / strange

Hey,

I have a 1997 PSD with the ZF-5, 22x,xxx miles, ts-5 position chip, 6637 intake, diamond eye exhaust 4", new cps, 3x gauges boost, pyro, hpop.



I have owned the truck now for about a year, and I have noticed this "problem" has been occurring on and off.

When I start my truck, it will run like one of two scenarios.

First, I will have my chip set to 45+hp economy mode, more power than stock. A little boggey if I give it too much gas at around 1500rpm, Not as much power as I would expect.

Second, No matter if I have my chip set to 45+ or 140+ (I have stock injectors), the truck will run like a beast. Full power, not boggey at all, no smoke, running like it was brand spanking new breathing fire.

Here is what's weird. Sometimes it will be running like the second case, sometimes the first. Its never consistent. But, when it is not running like case two, the HPOP jumps a little bit up and down when at idle. Just a hair really. You can hear the engine rev up a hundred RPM or so at max. Almost unnoticeable.

Does anyone think this is an HPOP problem, sensor problem, something else I'm not thinking of? I've done some searching but so solid answers. I thought it would be my CPS, but I've replaced that recently.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 06-17-2012, 12:32 PM
Compression Ignition Addict
 

Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,036
Thanks: 0
Thanked 12 Times in 12 Posts
Feedback Score: 0 reviews
First, are those canned TS tunes? 1500RPMs is right about the time the turbo lights, maybe a bit before. The nature of a V8 is to produce power at higher RPMs.
I'd pull the chip to test anything first. Then you'd have to monitor IPR and ICP values under WOT runs to see what they do.
Then reinstall the chip and do the tests again.
Reply With Quote Quick reply to this message
  #3  
Old 06-17-2012, 12:53 PM
Member
 

Join Date: Aug 2011
Location: Bay Area, CA
Posts: 57
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I do have canned tunes. They weren't exactly custom for my truck or anything from TW. I thought all you do was give them your year and tranny and you're good.

Also, I've tested this without the chip and it happens too. The HPOP pressure varries a little bit.


Wouldn't I know that the IPR is giving false values if the orings are messed up? There is no leakage there. Just a thought.

Also, since I have no check engine light, shouldn't the ICP be okay?

Not trying to say you're wrong or anything, just trying to figure out what the heck is going on with my engine.
Thanks
Reply With Quote Quick reply to this message
  #4  
Old 06-17-2012, 01:12 PM
Compression Ignition Addict
 

Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,036
Thanks: 0
Thanked 12 Times in 12 Posts
Feedback Score: 0 reviews
Custom tunes are more than just year and trans option.

What ICP pressures are you seeing anyway?

I'm not sure I understand what you mean about the IPR. I'm saying that you need to watch the duty cycle and see if it is changing when the truck runs worse.
And no CEL doesn't always mean ICP is ok.

The other thing to check would be fuel pressure.
Reply With Quote Quick reply to this message
  #5  
Old 06-17-2012, 04:14 PM
Member
 

Join Date: Aug 2011
Location: Bay Area, CA
Posts: 57
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
In regards to the IPR, I thought that typical IPR failures are leaks at the orings sealing the IPR, where symptoms include poor idle, loss of power, and the engine dying.

As for ICP pressures, I do not have a means to check what the ICP is sending exactly in terms of voltage, but on my gauge it reads at idle approximately 300psi or so, and varies about 50 psi at worst for half a second when running poorly.
Reply With Quote Quick reply to this message
  #6  
Old 06-17-2012, 04:27 PM
Compression Ignition Addict
 

Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,036
Thanks: 0
Thanked 12 Times in 12 Posts
Feedback Score: 0 reviews
Well the IPR could be going bad too.
That is way too low for ICP readings. 500PSI is cranking minimum. So you have a HPO issue.
Reply With Quote Quick reply to this message
  #7  
Old 06-17-2012, 05:09 PM
Member
 

Join Date: Aug 2011
Location: Bay Area, CA
Posts: 57
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
ah sorry sorry, I read the gauge wrong. Its 600psi because each tick is 2 x 100
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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
Display Modes

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



All times are GMT -8. The time now is 03:28 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors