post #16 of Old 02-03-2013, 01:20 PM Thread Starter
Viper723
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1995 YJ Wrangler 
 
Join Date: Apr 2011
Location: Santa Fe
Posts: 373
Okay I got a second 4.0 for 450, and I am planning on putting it in tomorrow, but of course my engine hoist is not working now...


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post #17 of Old 02-07-2013, 11:37 PM Thread Starter
Viper723
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Okay, so I have gotten the engine in and hooked up, and it is running, but after I let it warm up and rev it, when I let off the gas it usually dies. I checked my IAC, TPS, and my o2 sensor, but nothing helped... I put the symptoms up on here and somebody asked if my speedo is hooked up (its not). Apparently this can affect the idle RPMs when you let off the gas...

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post #18 of Old 02-08-2013, 05:01 AM
Que89YJ
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1989 YJ Wrangler 
 
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Yes. It is used for idle set on decel. Hook it up.
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post #19 of Old 02-08-2013, 12:24 PM Thread Starter
Viper723
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Quote:
Originally Posted by Que89YJ View Post
Yes. It is used for idle set on decel. Hook it up.
Thats one thing I never would have thought of haha I go back to school Monday so I will hook it up then...

This engine has about 95k on it too, so there is some blowby, but not pouring out smoke like the other one haha I hooked up the PCV system and it seems to take care of the smoke when its running, but it does leak out when its turned off. Does this sound alright to everyone???

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post #20 of Old 02-08-2013, 01:21 PM
Que89YJ
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Oil leaks out of the ccv?
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post #21 of Old 02-08-2013, 02:01 PM Thread Starter
Viper723
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Quote:
Originally Posted by Que89YJ View Post
Oil leaks out of the ccv?
Not that I have seen yet, just some white exhaust gases... I think it is within the acceptable margin, the one I put in first was spraying oil out of it haha it was toast...

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post #22 of Old 02-13-2013, 04:54 PM Thread Starter
Viper723
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I got the computer issues fixed, and she is running like a top now... It has so much more power than the 4 banger haha I love it. Anybody that runs into an issue ask me questions, because I ran into plenty haha

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post #23 of Old 02-13-2013, 06:37 PM
Que89YJ
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What fixed it?
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post #24 of Old 02-13-2013, 07:01 PM Thread Starter
Viper723
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As per the advice, the speed sensor was not hooked up. Part of the old harness was on the transfer case so I thought it was plugged in. It still didnt work after I did it, plus it was throwing an O2 code, so I replaced the O2 sensor and I finally realized I had to reset the computer and erase the adaptive memory. Once I did that it started to work like it should. I drove it two hours today and it all feels great.

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