Engine revs when lights on - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 3 Old 12-21-2008, 09:00 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Nov 2007
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Engine revs when lights on

I have a 94 7.3 IDI bus with lots of exterior lights. When I turn the headlights and clearance lights on, the engine immediately sounds like the rpm steps up. I don't have a tach so I can't tell. Is there a device that steps up engine speed to increase altenator output?
daveclow is offline  
post #2 of 3 Old 12-21-2008, 09:34 AM
Powerstroke.org Rookie
 
Join Date: Aug 2008
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
im sure the engine detects a major amp draw its probably normal
insane3639 is offline  
post #3 of 3 Old 12-21-2008, 05:09 PM
Emergency Services

 
Join Date: Apr 2008
Location: Beeville, TX
Posts: 1,489
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 1
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
IDI engines don't detect a darn thing. Now it probably does have a charge protect system, where when the amps being drawn goes up, it triggers a vacuum solenoid that pulls the throttle lever. All the older ambulances have them. I would guess a bus would too.

Eli Benson - EMT, Ambulance Mechanic
----------
'08 F350 Dually KR - Spartan'd
'07 F250 CC SB 4x4 XLT - SCT /w Innovative Tunes
4 '09 & '10 E350 6.0l ambulances
1 '08 Duramax 6.6 (LMM) van ambulance
elibenson 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