International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > Fuel Injection

Reply
 
Thread Tools Search this Thread Display Modes
  #41  
Old 09-09-2021, 08:29 PM
fsjcowboy's Avatar
fsjcowboy fsjcowboy is offline
230 Tornado
 
Join Date: Oct 02, 2009
Location: Senoia, GA
Posts: 17
Howell TBI followup

Rob,

Thanks to you and your thread, I competed my first Howell TBI install. Now that I've "experienced" the install, I'd like to ask and add a comment or two.

For power to the 12VDC ignition wire, I teed off of the "IGN, LPS" fuse on the main fuse panel. Where did you connect yours?

Funny thing happened on the way to TBI installation.............. while I was contemplating using the hole saw for the pass-thru to the cabin, I noticed an oblong factory, two-screw panel behind the floor insulation. It's just above the black, flexible condensate drain for the A/C. That's where I pulled my cabin-related wiring through. Plenty of room for all of the plugs to pass through. It's only drawback is that it is closer to the right exhaust manifold.

I have not connected my Howell TBI VSS to my Dakota Digital cruise control yet. It the VSS input connection really needed? I've driven the Jeep about 40 miles and haven't noticed anything wonky. What do ya think?

My TBI is working great, so far. I only had to set the timing. Howell suggests 6-8 degrees BTDC. I set mine at 10 degrees BTDC. Other than that, no other adjustments!

I don't know how to send pics. I think my files are too large and I'm not very computer savvy.

Thank you for your documentation on your installation. I've been sitting on this Howell TBI kit for 6 years and never got the guts to start. Your info gave me a good push in the right direction.
__________________
'87 GW
'88 GW
'89 GW lifted
'89 GW chopped
'78 J10



"If someone ever tells you that you're eating too much bacon, STOP TALKING TO THEM! You don't need that kind of negativity in your life."

Last edited by fsjcowboy : 09-09-2021 at 08:40 PM.
Reply With Quote
  #42  
Old 09-10-2021, 11:49 AM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Hey, thanks for the kudos, I'm glad someone found it useful.
I've read the VSS definitely helps with keeping the vehicle running properly, and since it was one of the easiest things to install, so I did it.
So, I had a chance to take a pic of how I tied it in. Turns out I also used the IGN/LPS fuse location on the right, as it serves the purpose well with key positioning.
The cable on the left is for the sunroof power:
PXL_20210910_173730736 by Robert Stone, on Flickr
__________________
--Rob--
1988 Jeep Grand Wagoneer / Baltic Blue & Tan
2008 BMW 535xi Wagon / Deep Sea Blue & Tan

My build thread:
https://ifsja.org/forums/vb/showthread.php?t=189245
My Howell TBI Install How-To:
https://ifsja.org/forums/vb/showthread.php?t=189877

Last edited by MysticRob : 09-10-2021 at 10:21 PM.
Reply With Quote
  #43  
Old 11-23-2021, 10:50 AM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Finally remembered to post a pic of the vacuum hose routing for the Howell system:

Howell Vacuum Diagram by Robert Stone, on Flickr
__________________
--Rob--
1988 Jeep Grand Wagoneer / Baltic Blue & Tan
2008 BMW 535xi Wagon / Deep Sea Blue & Tan

My build thread:
https://ifsja.org/forums/vb/showthread.php?t=189245
My Howell TBI Install How-To:
https://ifsja.org/forums/vb/showthread.php?t=189877
Reply With Quote
  #44  
Old 01-09-2022, 08:25 AM
Theodore Theodore is offline
232 I6
 
Join Date: Sep 10, 2018
Location: KINGSPORT, TN
Posts: 88
Quote:
Originally Posted by MysticRob
Finally remembered to post a pic of the vacuum hose routing for the Howell system:

Howell Vacuum Diagram by Robert Stone, on Flickr

Hey, MysticRob - wanted to thank you for documenting your build in such detail - have been following along; finding/adding missing parts back as we go. Used the diagram you posted to add back the charcoal canister, vacuum switch, & associated lines - had my first proper fill-up ever, without the pump continually cutting-off a couple of weeks ago!

I also have TBI EFI, am looking to get a new EFI wiring harness to move it from under-hood to under-dash (long story); A/C's out - awaiting the new harness; then on to A/C, carpet, & seats.
Reply With Quote
  #45  
Old 01-09-2022, 10:40 AM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Quote:
Originally Posted by Theodore
Hey, MysticRob - wanted to thank you for documenting your build in such detail - have been following along; finding/adding missing parts back as we go. Used the diagram you posted to add back the charcoal canister, vacuum switch, & associated lines - had my first proper fill-up ever, without the pump continually cutting-off a couple of weeks ago!

I also have TBI EFI, am looking to get a new EFI wiring harness to move it from under-hood to under-dash (long story); A/C's out - awaiting the new harness; then on to A/C, carpet, & seats.

Nice! Glad it helped.
Looking forward to seeing your continued resto of yours, and seeing more good scores from dilapidated derelict fields.
__________________
--Rob--
1988 Jeep Grand Wagoneer / Baltic Blue & Tan
2008 BMW 535xi Wagon / Deep Sea Blue & Tan

My build thread:
https://ifsja.org/forums/vb/showthread.php?t=189245
My Howell TBI Install How-To:
https://ifsja.org/forums/vb/showthread.php?t=189877
Reply With Quote
  #46  
Old 01-12-2022, 04:55 AM
Theodore Theodore is offline
232 I6
 
Join Date: Sep 10, 2018
Location: KINGSPORT, TN
Posts: 88
Hey, Rob - wondering if you have any pix of how your fuel line & return is routed? Mine routes similar to what you show to where the frame bends up over the axle; once there, I have rubber line following the frame to the front of the block, up the front & over the intake to the throttle body. Am wondering if you came up the firewall & straight over? Or, if there
Reply With Quote
  #47  
Old 01-12-2022, 09:35 AM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Quote:
Originally Posted by Theodore
Hey, Rob - wondering if you have any pix of how your fuel line & return is routed? Mine routes similar to what you show to where the frame bends up over the axle; once there, I have rubber line following the frame to the front of the block, up the front & over the intake to the throttle body. Am wondering if you came up the firewall & straight over? Or, if there

Hard to see I think, but my #4 thread post shows both feed and return lines. Since mine is an 88, both the feed and return lines are on the driver side frame rail, so I simply cut the feed hardline near the frame void in front of the fuel tank cover to install the filter and pump, and cut the return line just before where the e-brake cable pops out of the frame. That's the pic where I'm flaring that return line, as it's a slightly smaller diameter and the return hose wouldn't naturally stay on.
https://www.ifsja.org/forums/vb/show...95&postcount=4
__________________
--Rob--
1988 Jeep Grand Wagoneer / Baltic Blue & Tan
2008 BMW 535xi Wagon / Deep Sea Blue & Tan

My build thread:
https://ifsja.org/forums/vb/showthread.php?t=189245
My Howell TBI Install How-To:
https://ifsja.org/forums/vb/showthread.php?t=189877
Reply With Quote
  #48  
Old 01-12-2022, 06:48 PM
Theodore Theodore is offline
232 I6
 
Join Date: Sep 10, 2018
Location: KINGSPORT, TN
Posts: 88
Quote:
Originally Posted by MysticRob
Hard to see I think, but my #4 thread post shows both feed and return lines. Since mine is an 88, both the feed and return lines are on the driver side frame rail, so I simply cut the feed hardline near the frame void in front of the fuel tank cover to install the filter and pump, and cut the return line just before where the e-brake cable pops out of the frame. That's the pic where I'm flaring that return line, as it's a slightly smaller diameter and the return hose wouldn't naturally stay on.
https://www.ifsja.org/forums/vb/show...95&postcount=4

Apologies, I must have not been clear; where does it go from there? Ie., does it route up the firewall on the drivers side, or toward where the mechanical fuel pump was & up the front of the block & back over the intake to the throttle body? I don

Edited: bit by the apostrophe bug…
Reply With Quote
  #49  
Old 01-12-2022, 06:49 PM
Theodore Theodore is offline
232 I6
 
Join Date: Sep 10, 2018
Location: KINGSPORT, TN
Posts: 88
Quote:
Originally Posted by MysticRob
Hard to see I think, but my #4 thread post shows both feed and return lines. Since mine is an 88, both the feed and return lines are on the driver side frame rail, so I simply cut the feed hardline near the frame void in front of the fuel tank cover to install the filter and pump, and cut the return line just before where the e-brake cable pops out of the frame. That's the pic where I'm flaring that return line, as it's a slightly smaller diameter and the return hose wouldn't naturally stay on.
https://www.ifsja.org/forums/vb/show...95&postcount=4

Apologies, I must have not been clear; where does it go from there? Ie., does it route up the firewall on the drivers side, or toward where the mechanical fuel pump was & up the front of the block & back over the intake to the throttle body? I dont have a pic of mine right now; will try to post what I have tmw to compare.
Reply With Quote
  #50  
Old 01-13-2022, 01:01 PM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Quote:
Originally Posted by Theodore
Apologies, I must have not been clear; where does it go from there? Ie., does it route up the firewall on the drivers side, or toward where the mechanical fuel pump was & up the front of the block & back over the intake to the throttle body? I dont have a pic of mine right now; will try to post what I have tmw to compare.

Just straight up the back of the engine near the firewall (since both TB nipples are on the rear) to keep it away from the exhaust.
__________________
--Rob--
1988 Jeep Grand Wagoneer / Baltic Blue & Tan
2008 BMW 535xi Wagon / Deep Sea Blue & Tan

My build thread:
https://ifsja.org/forums/vb/showthread.php?t=189245
My Howell TBI Install How-To:
https://ifsja.org/forums/vb/showthread.php?t=189877
Reply With Quote
  #51  
Old 01-13-2022, 02:22 PM
rang-a-stang's Avatar
rang-a-stang rang-a-stang is offline
Administrator
 
Join Date: Oct 31, 2016
Location: Camarillo, CA
Posts: 4,463
Quote:
Originally Posted by MysticRob
Just straight up the back of the engine near the firewall (since both TB nipples are on the rear) to keep it away from the exhaust.
Same as mine. I routed mine up near the brake booster, then soft line just behind the valve cover, meeting up with the TBI near the EGR valve.
__________________
79 Cherokee Chief (passed CA smog check Sept 2020)
(Cherokee Build Thread)
11 Nissan Pathfinder Silver Edition 4x4
09 Mazdaspeed3 Grand Touring
Reply With Quote
  #52  
Old 01-14-2022, 06:10 PM
Theodore Theodore is offline
232 I6
 
Join Date: Sep 10, 2018
Location: KINGSPORT, TN
Posts: 88
Quote:
Originally Posted by rang-a-stang
Same as mine. I routed mine up near the brake booster, then soft line just behind the valve cover, meeting up with the TBI near the EGR valve.

K; thanks. MysticRob, looking back at old pix, is the fuel line running in parallel with the brake booster line in this pic?

Head-on pic:
PXL_20210518_233159515 by Robert Stone, on Flickr
Reply With Quote
  #53  
Old 01-16-2022, 12:47 PM
babywag's Avatar
babywag babywag is offline
out of order
 
Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
Posts: 10,002
Yep, along firewall as well. I strongly recommend to folks metal lines off TBI, then soft lines.
Especially folks running an EGR valve.
Dorman sells TBI line repair kits with correct fittings for TBI.
Bend easily and gives me a little piece of mind.
OEMs used metal sections for a reason.
__________________
Tony
88 GW, 67 J3000, 07 Magnum SRT8
Reply With Quote
  #54  
Old 01-16-2022, 04:11 PM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Quote:
Originally Posted by Theodore
K; thanks. MysticRob, looking back at old pix, is the fuel line running in parallel with the brake booster line in this pic?

Negative, literally right up the back of the transmission bell housing, up through the tunnel, straight into the TBI nipples on the rear of the throttle body.
__________________
--Rob--
1988 Jeep Grand Wagoneer / Baltic Blue & Tan
2008 BMW 535xi Wagon / Deep Sea Blue & Tan

My build thread:
https://ifsja.org/forums/vb/showthread.php?t=189245
My Howell TBI Install How-To:
https://ifsja.org/forums/vb/showthread.php?t=189877
Reply With Quote
  #55  
Old 01-18-2022, 02:45 PM
bristolf2b bristolf2b is offline
230 Tornado
 
Join Date: Jun 14, 2021
Location: sf bay area
Posts: 1
Howell FI

Hi Rob

I want to thank you for this tread. I just started the installation of a Howell system on my 89 wagoneer and it has cleared up a lot of questions i had. how were you able to remove the evaporator from the houseing. there doesn't seem to be enough slack in the lines to get it out.

thanks again. Lane
Reply With Quote
  #56  
Old 01-20-2022, 12:29 AM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Quote:
Originally Posted by bristolf2b
Hi Rob

I want to thank you for this tread. I just started the installation of a Howell system on my 89 wagoneer and it has cleared up a lot of questions i had. how were you able to remove the evaporator from the houseing. there doesn't seem to be enough slack in the lines to get it out.

thanks again. Lane

Two people would be easier, but one can still do by starting out with the entire assembly kinda stuck up in that void near where I placed the TBI brain box, then lowering the housing, being careful to keep the evaporator still up in that void. It's tricky, but with some effort you can lower the housing down into the footwell to give it enough clearance to pull out, then gently dropping the evaporator down from the void.

Also, be aware there should be at least 2 screws that are on the back of the housing that secure the evaporator inside the housing. Make sure all that is removed, obviously.
__________________
--Rob--
1988 Jeep Grand Wagoneer / Baltic Blue & Tan
2008 BMW 535xi Wagon / Deep Sea Blue & Tan

My build thread:
https://ifsja.org/forums/vb/showthread.php?t=189245
My Howell TBI Install How-To:
https://ifsja.org/forums/vb/showthread.php?t=189877
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Couple of questions on my Howell TBI Blake Fuel Injection 2 03-26-2012 03:17 PM
Scored an AMC 360 Howell TBI from a yard today! Blake Fuel Injection 4 01-05-2012 07:49 PM
Howell TBI or Holley TBI + Igntion Hemp Fuel Injection 2 03-25-2010 10:41 PM
Howell TBI Preliminary Preporation SnowShoe Fuel Injection 39 02-06-2010 11:34 AM
Strange thing with my Howell TBI (kinda long) ne715 Fuel Injection 0 04-13-2008 04:48 PM


All times are GMT -6. The time now is 04:07 PM.


Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
corner corner