TBI won't spray fuel. - Off-Road Forums & Discussion Groups
Go Back   Off-Road Forums & Discussion Groups > Chevy and GM > GM Standard IFS Trucks & SUV's

GM Standard IFS Trucks & SUV's All discussion of full sized IFS Trucks, SUV's to include Suburban



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-08-2004, 06:29 PM
Aprentice
 
Join Date: Jun 2003
Location: Fort Collins, CO
Posts: 87
Thanks: 0
Thanked 0 Times in 0 Posts
Joel is an unknown quantity at this point
Default TBI won\'t spray fuel.

I haven't checked anything yet, but if a 93 TBI 350 won't spray any fuel (it has spark and fuel preasure and starts up on starting fluid) is there anything other than the throttel pos. sensor and idle control sensor (and obviously the ecm and fuses) that would cause it to have NO fuel?
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 03-08-2004, 08:33 PM
Can't Get Enough
 
Join Date: Dec 2002
Location: Texas
Posts: 1,113
Thanks: 0
Thanked 2 Times in 2 Posts
c_rock is an unknown quantity at this point
Default Re: TBI won\'t spray fuel.

Clogged injector maybe???
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote Quick reply to this message
  #3  
Old 03-08-2004, 09:34 PM
Aprentice
 
Join Date: Jun 2003
Location: Fort Collins, CO
Posts: 87
Thanks: 0
Thanked 0 Times in 0 Posts
Joel is an unknown quantity at this point
Default Re: TBI won\'t spray fuel.

Niether of them spray, or even drip. I am going to start with fuses, then check the Throttle position sensor.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote Quick reply to this message
  #4  
Old 03-08-2004, 10:24 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Default Re: TBI won\'t spray fuel.

I think your fuel pump may have got bad. Have you checked it yet?
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote Quick reply to this message
  #5  
Old 03-08-2004, 10:24 PM
Krayzie's Avatar
Enthusiast
 
Join Date: Sep 2003
Location: Flushing Michigan - Genesee County
Posts: 281
Thanks: 0
Thanked 0 Times in 0 Posts
Krayzie is on a distinguished road
Default Re: TBI won\'t spray fuel.

No... TPS and IAC have nothing to do with injectors not spraying. IAC simply acts as an air bypass valve and the TPS as an injector pulse controller... basically the further the pedal goes, the more fuel the TPS lets out of the injectors... I have never heard of one stopping injector spray. You say you have good fuel pressure, what did you get for readings and where did you take your readings at? Your diaphragm in the pressure regulator/meter assembly may have failed. On a lesser note, a portion of your ignition module may have fried. Take it to the Zone and get it tested. It can shut down different sections of your fuel system or ignition. Just try it... Is it possible that you pinched the injector wires in your air cleaner or spacer? I just did that a week ago and it would not let me start my truck until I fixed the broken wire and reset the PCM.

I also had an s-10 Blazer that had broken wiring under the drivers seat that shorted out the fuel system sporadically... what a wierd problem, just driving along then all fuel just stopped. Theres lots of reasons why they may not be firing... before you go replacing injectors though, check the injector harnesses with either a noid light or a voltmeter, just to make sure there is voltage up there... I wish you luck!
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote Quick reply to this message
  #6  
Old 03-09-2004, 12:14 AM
wrath's Avatar
Carpal \'Tunnel
 
Join Date: Nov 2001
Location: Waukesha, WI
Posts: 3,323
Thanks: 0
Thanked 1 Time in 1 Post
wrath is an unknown quantity at this point
Default Re: TBI won\'t spray fuel.

Check to make sure the fuel pump is running. If it initially runs for a few seconds then shuts off then there are two common problems. One is an oil pressure sensor and the other is the computer isn't getting a signal from the distributor saying the motor is turning.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote Quick reply to this message
  #7  
Old 03-09-2004, 09:09 PM
Aprentice
 
Join Date: Jun 2003
Location: Fort Collins, CO
Posts: 87
Thanks: 0
Thanked 0 Times in 0 Posts
Joel is an unknown quantity at this point
Default Re: TBI won\'t spray fuel.

The oil sensor is not hooked up, but it wasn't working before either (someone had the wrong sensor in it and it always read all the way to the right), it's not hooked up now, so it still read all the way to the right at 60+. I want to hook the check engine light back up tp check for codes. What pin # is it in the ECM so I can get it working?
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
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 Off-Road Forums & Discussion Groups 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:

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 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -5. The time now is 02:50 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.2.0
Copyright 1994-2009, VerticalScope Inc. // Off Road forums & discussion groups sitemap
side by side | atv | dirtbike | snowmobile | sandsport | competition | land use | Jeep | Toyota | Ford | GM