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Unread 02-24-2013, 06:20 PM   #1
weeds94yj
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1994 YJ Wrangler 
 
Join Date: Oct 2012
Location: carroll, iowa
Posts: 9
yj tbi conversion howell wiring harness

i recently took the 4.0 with a blown head and main bearing shot out of my 94 yj and am in the process of putting in a 350tbi/700r4/np241 in i just ordered a howell tbi wiring harness wondering if anyone had any tips when installing this harness

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Unread 02-25-2013, 07:18 AM   #2
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,481
Welcome to the forum.

There are a bunch of post on the Howell setup. Most on the 4.2L conversion but it should be essentially the same.
Google is your friend. I am not familar with the swap but if you use google you can find a bunch of info on it.
http://www.jeepforum.com/forum/f12/f...oogle-1003734/
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Unread 02-25-2013, 11:11 AM   #3
weeds94yj
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1994 YJ Wrangler 
 
Join Date: Oct 2012
Location: carroll, iowa
Posts: 9
thanks for the info i also just thought about can i take the fuel tank out of my 88 suburban and put it right into the jeep or at least the fuel pump
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Unread 02-25-2013, 11:35 AM   #4
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
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No, there isn't any reason too. The stock fuel pump is regulated down but puts out 60psi minimum. It should be more then enough pressure for your swap.
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Unread 02-25-2013, 09:43 PM   #5
weeds94yj
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1994 YJ Wrangler 
 
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Location: carroll, iowa
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but i will need to put a regulator in right 60psi if to much for tbi from what ive read
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Unread 02-26-2013, 06:05 AM   #6
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,481
Yes, you will need to regulate it to whatever pressure you need but the pump, tank, sending unit and the fuel guage can stay and save you a lot of hassel and $$$$$. The TBI is one injector and usually rated at 15psi. I don't know where you are getting the 350tbi but make sure that there isn't a regulator already there. Our TBI setup on the YJ has the regulator on the TBI on the 87-90. You might be able to just bolt up the lines if you are lucky!
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Unread 02-26-2013, 09:05 PM   #7
weeds94yj
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1994 YJ Wrangler 
 
Join Date: Oct 2012
Location: carroll, iowa
Posts: 9
the motor is out of a 88 suburban and as i was working under the jeep today i noticed all the steel that holds the body mounts is rusted out so i just got done taking the whole body off of the chassis is there anything else i should do when i have it taken down this far
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Unread 02-27-2013, 06:49 AM   #8
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
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If you have that much rust by the mounts you need to check the entire frame especially by the steering gear box and the shackles. The frames rust from the inside out.
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Unread 02-27-2013, 10:21 PM   #9
weeds94yj
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1994 YJ Wrangler 
 
Join Date: Oct 2012
Location: carroll, iowa
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ya my frame was rusted out were the skid plate and the rear crossmember were other than that looks good just have to do a little welding on her
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Unread 02-28-2013, 07:12 AM   #10
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,481
All these welder on the forum and noone by me! Good luck. Do a build thread and take some pics. It sounds like you have a lot of stuff to add to the forum.
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