starts, runs, revs, no tach @ low rpms - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 2 Old 11-14-2013, 02:45 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Nov 2013
Location: austin
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
starts, runs, revs, no tach @ low rpms

Starts, idles, revs, runs smooth, until you give it more than Quarter throttle, then it will die when you let off throttle. Tach sits on 0 until about 1000 rpms also has slow throttle response. No excess smoke. Sat for at least a year, I think it was running good when parked. pretty sure its fuel problem. New to this forum stuff. hope I did this right. Hope I can find any responses when or if I get any. someone please help the old guy. Thanks
cummincents is offline  
Sponsored Links
Advertisement
 
post #2 of 2 Old 11-30-2013, 06:31 PM
Powerstroke.org Rookie
 
Join Date: Nov 2013
Location: San Diego
Posts: 10
Thanks: 1
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Not much info to go on, but you may want to replace your CPS (crankshaft position sensor). Sounds like it could be high resistance/low voltage in the sensor...they don't always just go out all at once, but will often give you warning signs such as you have described. The ECM gets it's signal from the CPS and then sends the signal to the tach.. If the engine cranks, but there's no tach movement...the CPS is a good place to start. Sounds like the sensor is on it's way out. This issue may not present any codes. the last two I dealt with did not show any trouble codes present.
Crank Some Heavy Metal is offline  
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:
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