4.2L Fuel Injection and Build - Page 34 - JeepForum.com

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post #496 of 612 Old 03-25-2013, 08:49 AM
Que89YJ
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Brandon is your fuel pump manually switched?

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post #497 of 612 Old 04-03-2013, 08:31 AM
BrandonReed2001
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No I wired it up to the fuel pump relay thats tied to the ignition switch. I figured that part out now i am always keeping 40 psi. Now my problem is that sometimes i have weak orange spark at my plugs or sometimes i dont have spark at all. Usually to get it to spark it has to be boosted off. I have replaced the whole distributor and plugs. I am going to pick up a Crankshaft sensor today. When i quit working on it last night i went from sometimes having spark to no spark and not enough pawer to make the fuel pump run. I dont know whats going on.
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post #498 of 612 Old 04-03-2013, 05:30 PM Thread Starter
cevans87
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Brandon, call me... pm sent, que89yj leave my thread alone and stop replying to everyone, your not helping as much as you think and keeps me from getting updates to my email to answer questions

Built Not Bought #447, 1992 Jeep XJ Supercharged 4.7, 1988 Jeep YJ Auto 4.2L, 2008 Commander Limited HEMI, 1990 Jeep YJ 4.7L Fuel Injected AW4, 1981 Scrambler 304 Auto

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post #499 of 612 Old 04-03-2013, 05:31 PM Thread Starter
cevans87
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Brandon, pm wont send. Call me 4345820148

Built Not Bought #447, 1992 Jeep XJ Supercharged 4.7, 1988 Jeep YJ Auto 4.2L, 2008 Commander Limited HEMI, 1990 Jeep YJ 4.7L Fuel Injected AW4, 1981 Scrambler 304 Auto

I Am The Jeep Surgeon!!!
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post #500 of 612 Old 04-10-2013, 10:47 AM
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cevans87, this is a really great thread. I've read about the first 18 pages so far. As it happens, I have a co-worker looking to scrap a '92 Cherokee Laredo that has the 4.0L HO and an automatic trans. He's asking $200, I gotta haul it off myself, and soon. I've already learned enough to know this is a great deal, I pick the Jeep up in three days (Saturday). There are a few particulars that I think I need to track down before I can make the swap.

I'm currently driving a 1980 CJ5 with what must be a special order engine... It's the 258 low compression version with a 1bbl carb. Now, my CJ5 is a 1980 and the "B" engine code is in the VIN even though it shouldn't be an option. I believe I've figured out (with the help of the forum) that my stroke is 3.90", giving me a compression ratio of 8:1. The issue arises that I've got a T170 3-speed in the Jeep now, but could also put in a T176 4-speed. I have both and all the hardware. If you would prefer I could PM you the specific details, rather than polluting your build thread.

Love the thread,
Thanks

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post #501 of 612 Old 04-10-2013, 02:54 PM Thread Starter
cevans87
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You can pm or call me

Built Not Bought #447, 1992 Jeep XJ Supercharged 4.7, 1988 Jeep YJ Auto 4.2L, 2008 Commander Limited HEMI, 1990 Jeep YJ 4.7L Fuel Injected AW4, 1981 Scrambler 304 Auto

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post #502 of 612 Old 04-10-2013, 03:44 PM
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Sorry Cevan. I didn't see you on in such a long time I thought you bailed. Glad to see you back posting and following your thread. I will bail on the thread and leave it alone. It is a great thread.
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post #503 of 612 Old 04-10-2013, 07:02 PM
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Quote:
Originally Posted by cevans87 View Post
video of my shift indicator lights

http://www.youtube.com/watch?v=X0v5w...ZhUsQJ22S8i3QU=

Red = Reverse

Green = Drive

you can wire Park, Reverse, Neautral, Drive (Not Overdrive), and 1-2

OverDrive has no connection between wires, the ecm see's it as an open circuit (which it is) which means I cannot put a light in
You could wire each of the other positions to a SPDT relay (single pole, double throw) and then wire the OD light through each of the normally closed contacts in series. Then it will only light if none of the other conditions exist, and as soon as one does it will go out. Half a dozen relays is quite a few to get another light, but if you want the light you could get it...


Half a dozen of these for less than $30 and a box of spade connectors, golden!
Absolute RLS125-12-VCD Automotive Relay

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post #504 of 612 Old 04-16-2013, 07:05 AM
Zorm
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just a thought, would it be worth it to somehow put a chevy HEI dizzy in the mix or maybe the Ford TFI dizzy upgrade?
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post #505 of 612 Old 05-13-2013, 01:30 PM
voz
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I have been reading this thread, quite GREAT!

this is my own.. http://www.jeepforum.com/forum/f12/f...-swap-1478412/


Question I have is , I have a sending unit which I will stick in my fuel tank,, Where would I plug harness into?
I have a 89 ..

Thank You!

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post #506 of 612 Old 05-13-2013, 02:53 PM Thread Starter
cevans87
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Wire it to the same plug the old unit was hooked to, you have to add the power wire, its on the body side of that plug but not the pump side... your current harness has 3 going into the plug and only 2 going out to the sending unit

Built Not Bought #447, 1992 Jeep XJ Supercharged 4.7, 1988 Jeep YJ Auto 4.2L, 2008 Commander Limited HEMI, 1990 Jeep YJ 4.7L Fuel Injected AW4, 1981 Scrambler 304 Auto

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post #507 of 612 Old 05-13-2013, 03:45 PM
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Quote:
Originally Posted by cevans87 View Post
Wire it to the same plug the old unit was hooked to, you have to add the power wire, its on the body side of that plug but not the pump side... your current harness has 3 going into the plug and only 2 going out to the sending unit
X2 with cevans87. The wire has already been ran to the back, all you have to do is locate the Orange wire up at the fuseblock/bulkhead connector. This is what I had done. While you have the tank down, may I suggest that you replace the fuel lines. Make sure that you use lines that are rated for fuel injection.

Robert.

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post #508 of 612 Old 05-14-2013, 06:46 AM
voz
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Remmons & cevans87 thank You Both!

I was planning on replacing fuel lines.

VOZ™
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post #509 of 612 Old 05-14-2013, 10:09 AM
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Originally Posted by voz View Post
Remmons & cevans87 thank You Both!

I was planning on replacing fuel lines.
No, cevans87 deserves all the credit, for it was him who had helped me in my conversion. I'm just merely another tool in the box.

Robert.

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post #510 of 612 Old 05-16-2013, 12:57 PM
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You're a good man Remmons, most would have stuck their chest out!

I'm a square peg in a round hole!

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