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Unread 11-24-2012, 10:30 PM   #1
davidmthomas97
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1989 YJ Wrangler 
 
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Renix 4.0 Conversion Help Won't Start

I recently swapped a 4.0 into my YJ, used the same harness and ecu from the engine. I redid the bulkhead to my underdash wiring, I have the fuel pump solenoid working correctly along with the pump itself. I was able to drive the jeep i got it out of before i took the engine out. I converted ev erything used same flywheel and kept the CPS on there but it is not starting. I never messed with the distributor or wires. Thanks

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Unread 11-25-2012, 05:03 AM   #2
cruiser54
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What year 4.0 and wiring?

Do you have spark?
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If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 11-25-2012, 11:36 AM   #3
davidmthomas97
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Yeah I have spark and it came out of a 90 Cherokee
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Unread 11-25-2012, 11:47 AM   #4
cruiser54
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Pump in the tank? Where did you get that?
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If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 11-25-2012, 05:08 PM   #5
davidmthomas97
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I bought the setup for a 92-95 20 Gal. Tank
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Unread 11-25-2012, 06:11 PM   #6
cruiser54
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That should be okay. Only way to be sure is to check fuel pressure at the rail with a gauge.
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 11-25-2012, 11:46 PM   #7
davidmthomas97
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I don't have a guage to check it but it sounds normal
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Unread 11-26-2012, 04:58 AM   #8
cruiser54
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I'm not understanding how you can hear fuel pressure. Am I missing something?
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 11-29-2012, 08:18 PM   #9
davidmthomas97
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No i can hear the pump and when i had the pump out it put out a pretty good amount of pressure when I would pressure test the new lines with it. But I came down to the issue of vacuum. I am only getting about 5lbs and I have every plug i can see on the engine and the diagram plugged and still getting the same pressure.
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Unread 11-30-2012, 05:43 AM   #10
cruiser54
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Vacuum is measured in inches, not pounds. How are you checking it?
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 11-30-2012, 10:37 PM   #11
davidmthomas97
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I have a vacuum gauge hooked in with a T on one of the lines coming from the nipple by the air cleaner
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Unread 12-01-2012, 04:09 AM   #12
cruiser54
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Quote:
Originally Posted by davidmthomas97 View Post
I have a vacuum gauge hooked in with a T on one of the lines coming from the nipple by the air cleaner
Not picturing that. Make sure you're in a line/fitting that for sure is getting actual intake manifold vacuum.
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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4.0 , conversion , jeep , wrangler yj

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