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  #1  
Old 04-20-2021, 02:07 PM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Howell TBI / EFI Installation How-To for CARB E.O. #D-452-2

I've looked up and down this forum for good Wagoneer-specific ideas on how to install the Howell TBI kit, but info is rare both here and via google searches.

Figured I'd create a thread to separately track the Howell install I'm doing on my mechanically stock 88 Grand Wagoneer. This will be an "as I build it" type of thing so final product might change during the course of updating this thread!

Here's the kit I bought straight from Howell:
https://howellefi.com/product/k247jp...eer-401-clone/

The two manuals they link to that are NOT very good references, as they're not Wagoneer-specific, nor of high quality:

1. https://howellefi.com/wp-content/upl...-1972-1993.pdf
2. https://howellefi.com/wp-content/upl...ion-Images.pdf

And off we go...
__________________
--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
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  #2  
Old 04-20-2021, 02:16 PM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Here's a pic of the kit out of the box.

From left, top to bottom:
harness
brain box
bag of zip ties, firewall grommet, and other stuff
bag of base plate, 4 tapered bolts to secure base plate to intake, and 3 bolts to secure throttle body to base.
throttle body
fuel filter
fuel pump
speed sensor
O2 sensor
high pressure EFI fuel hose

PXL_20210418_160538025 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 08:57 PM.
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  #3  
Old 04-20-2021, 02:34 PM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Instructions call for removal and/or rerouting of a lot of engine compartment crud, namely the air injection system components, some temp-vacuum sensors, and a ton of vacuum lines.

Out goes the air cleaner (to be reused later!), carburetor, smog (aka air injection) pump, pump brackets, air injection hoses, air injection manifold piping (metal piping to exhaust manifolds), and mass vacuum hoses from hell:

GONE!:
PXL_20210416_225404184 by Robert Stone, on Flickr

ALSO GONE!:
PXL_20210416_225414753 by Robert Stone, on Flickr

ALMOST GONE (DAMMIT)! 2 of the 7 air injection pipe bolts broke inside the manifolds. I got the driver side one out but the passenger side one needed chiseled flat:
PXL_20210418_180812416 by Robert Stone, on Flickr

The one I was able to get out next to one that came out easily:
PXL_20210418_174241942 by Robert Stone, on Flickr

I'll drill that last bolt out, tap the hole, and insert these 7 manifold plugs from TGW into the manifold holes:
https://teamgrandwagoneer.com/exhaus...-gw-1974-1991/

Not seen is the removal of the mechanical fuel pump and hard lines up to the intake area. I yanked all that and used the block off plate and gasket to seal the pump hole on the front of the block. No big deal, not worth a pic.
__________________
--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 09:04 PM.
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  #4  
Old 04-20-2021, 02:43 PM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
UPDATED THIS POST TO REFLECT RELOCATED FUEL PUMP AND FILTER!!

The Howell instructions call for mounting the fuel pump at mid-tank level or lower to avoid potential problems. I decided to take that advice and place the assembly behind the transmission crossmember near the bottom of the frame instead of forward of the crossmember and above the brake hardline. This called for cutting the fuel hardline just before the long straight section close to where the frame is open.

I used a Ridgid close quarters tubing cutter so I had enough room to cut the lines:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

PXL_20210425_231144214 by Robert Stone, on Flickr

Here's a better pic of the hardline I cut (above the filter). I wanted to flare the end but there's not enough room to use the kit in there, and the hardline is 5/16" and big enough to allow a nice tight fit once the rubber fuel hose is clamped down on it. I ran the rubber fuel hose in a gentle arc to bring it into the filter, and allow the filter to just sit in the void:
PXL_20210425_224343143 by Robert Stone, on Flickr

Good pic showing how low I had to mount the fuel pump so it doesn't sit too high above the fuel tank bottom:
PXL_20210425_224356759 by Robert Stone, on Flickr

I had plenty of fuel pump harness to allow moving the pump back from where I originally had it forward of the tranny crossmember (and likely too high). You can just barely see the old screw hole on the very right of the pic that originally held the fuel pump bracket:
PXL_20210425_235510624 by Robert Stone, on Flickr

Rolled up quite a bit of the fuel pump harness and hid it in the engine bay under the driver hood hinge:
PXL_20210425_235442042 by Robert Stone, on Flickr

Here's how much hardline I cut out. Longer one with rubber hose was the 5/16" feed line I cut near the frame void (near the tank), shorter one is the smaller diameter return line. I was able to pull both lines out thru the front and over the radiator core support with a little wrangling:
PXL_20210425_235720268 by Robert Stone, on Flickr

Here's where I cut the return line so I could have room to use the flare kit:
PXL_20210425_231217358 by Robert Stone, on Flickr

Since the return line is a smaller diameter, the flare kit gives it a better grip on the fuel hose and to help keep the hose clamp on:
PXL_20210425_232736742 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 09:13 PM.
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  #5  
Old 04-20-2021, 02:55 PM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Air injection pump and piping was removed from driver side, and it already looks better. Will repaint the power steering pump, and clean a few things up:
PXL_20210419_015742539 by Robert Stone, on Flickr

Pump and brackets will go into a box for storage and eventual reuse when I do the concours restoration (NOT!):
PXL_20210419_015730972 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 09:18 PM.
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  #6  
Old 04-20-2021, 03:00 PM
MysticRob MysticRob is offline
327 Rambler
 
Join Date: Nov 26, 2019
Location: Boise, ID
Posts: 673
Figure I'll do some touch-ups in the bay so took out the oil fill tube, sanded it down, primer'd, and painted it. Can't help it, it's a disease:
PXL_20210419_004444769 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 09:18 PM.
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