How to clean a TBI injector? - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 04-27-2007, 11:51 AM Thread Starter
Journeyman
 
Join Date: Mar 2000
Location: Spokane, WA USA
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
 
How to clean a TBI injector?

Looks like one of my TBI injectors is not spraying very well. Compared to the other one which spray a nice even mist, the other one seems to have more of a heavy droplet spray.

How do you, or can you, take the injector out to inspect what is causing the bad spray pattern. Itís a new Howell TBI conversion on a rebuilt 258. The TBI did sit for about two years dry before I was able to install it. Searched and could not find any posted write-ups.

Thanks
GeCJ7 is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 04-27-2007, 12:08 PM
Mud in my Veins
 
Junk Yard Genius's Avatar
 
Join Date: Sep 1999
Location: Southern Indiana
Posts: 5,383
Thanks: 0
Thanked 1 Time in 1 Post
 
Use a timing light hooked to the coil wire to see the actual spray cone and droplet configuration.
(Old Mechanics trick)
The stroboscopic effect will make the spray pattern a 'Stop Action' so you can get a good look at it.
If you want to slow the flashes down, connect to one of the spark plug wires...

Cleaning is easy depending on what type of injectors you have.
Some can be removed and manually cleaned.
Others have to be 'Pressure Cleaned' in place with a special solvent.
Still others can't be practically cleaned and have to be replaced...

Howell uses an early type of GM TBI that can be disassembled and serviced.
Personally, I'd take them apart, clean them with a healthy solvent, paying particular attention to deposits around the nose, and reassemble with fresh seals.

Remember, don't use a wire brush or anything that can scratch the injector or the injector body!
Nylon brush and strong solvent will do the trick.

(WWHLD!)
"What Would Hannibal Lecter Do?" With my Jeep!?
The 'Fillet The Other Cheek' philosophy!

Last edited by Junk Yard Genius; 04-27-2007 at 05:25 PM.
Junk Yard Genius is offline  
post #3 of (permalink) Old 04-27-2007, 12:13 PM Thread Starter
Journeyman
 
Join Date: Mar 2000
Location: Spokane, WA USA
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
 
Yes, its working, or running if thats what you mean.

Thanks
GeCJ7 is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 04-27-2007, 03:55 PM
Carpal \'Tunnel
 
Join Date: Nov 2000
Location: Manitoba, Canada
Posts: 2,687
Thanks: 0
Thanked 0 Times in 0 Posts
 
Nice pictures of disassembly:

WitchHunter Performance - Throttle Body injector removal

They do not work right unless they are properly spraying.

You might be well off to remove both injectors yourself and take them into a specialty shop to have them clean and test them. They have the right tools to clean and test them.
TiminMb is offline  
post #5 of (permalink) Old 04-30-2007, 10:11 AM Thread Starter
Journeyman
 
Join Date: Mar 2000
Location: Spokane, WA USA
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
 
Thank you! Thats is perfict.
GeCJ7 is offline  
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:
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 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

 
For the best viewing experience please update your browser to Google Chrome