post #1 of Old 08-30-2013, 09:12 PM Thread Starter
idaxj97
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1997 XJ Cherokee 
 
Join Date: Dec 2008
Location: Mountain Home ID
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Engine replaced, now wont start!

Ok I need JF's help, I just replaced my engine in my 97 Cherokee 4.0 Auto and now i cant get it to start. A quick back history I blew the head gasket on my jeep, the engine I bought the PO said it was outta a 98 and had 50,xxx miles on it he tried to put it into an 89 cherokee w/ all the renix stuff and he couldnt get it to run so he pulled it and here i sit with it in my jeep not running (yes I put all my stuff on the engine). So what we have dignosed is that I im getting fuel, spark, air, compression, timing and all the engine wants to do is turn over, Ive checked all my connections and grounds and nothing, its not even trying to start. I searched my symptoms and everything I found points at the CPS so tonight I replaced it and still nothing. We are totally lost as to what could be going wrong, what do you guys think?

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post #2 of Old 08-30-2013, 09:23 PM
slickfreeze
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so are you getting spark off both the coil, and after the distributor? first thing I would do is put the motor on TDC and double check the timing again, you might be off a tooth? and also double check you have the plug wires going to the correct cylinders. Mine wouldnt start after a rebuild and it was the distrubutor pickup that went bad.

Oh and just a thought, make sure you get the CPS for whatever year motor you used the flywheel off of. Not sure if they are different between 97-98. but I know some years they are different and the CPS wont read the flywheel correct and thus will not start

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post #3 of Old 08-30-2013, 09:30 PM
slickfreeze
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sorry I just thought of something else, make sure the plugs comming from the transmission are pluged in. One of them contain NSS, which will not let the engine start if not pluged in.

________oooo
//__l_l_,\____\,_____
l_/-\_l__l_/-\_|[]lllll[]|
_\_/==== |; _\\ \\
_(o)_)___(o)_)--o-)_)

"ask not what your country can do for you; ask what you can do for your country." John F. Kennedy
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post #4 of Old 08-31-2013, 07:35 PM Thread Starter
idaxj97
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slickfreeze thanks for your ideas we checked everything over before we tore down the front of the engine to the timing chain. When we did this we found the the timing marks to be close to 45* out, so we pulled the chain lined up the marks and will reinstall the chain tommorow, gotta take a break and watch the BSU beat on Washington. GO BRONCOS!
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post #5 of Old 08-31-2013, 08:52 PM
cruiser54
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At this point, the rotor should be just a hair past the #1 terminal on the distributor cap.

Setting Your 4.0 at #1 TDC


With #1 spark plug removed, turn the engine over clockwise using the 3/4" front crankshaft bolt. You will see the degree marks on your front cover. Mark the 0 with chalk or white-out.You will see the timing mark on the balancer. Mark it with chalk or white-out. While turning the engine over, put your finger/thumb over #1 spark plug hole. As the mark on the balancer approaches the marks on the front cover, if you are coming up on #1 TDC, pressure in the cylinder will push on your finger. If there's no pressure, you're at #6 TDC and need to crank the engine over until you see the marks coming together and you get pressure. Set the mark on the balancer to the 0 mark on the front cover.

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

www.cruiser54.com

My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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post #6 of Old 09-01-2013, 10:45 PM Thread Starter
idaxj97
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Location: Mountain Home ID
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Cruiser54 and Slickfreeze thanks for your help after 3 weeks with out my jeep she is finally home what ended up being the problem was that the mechanical timing was 90* off so we got all that realigened and put back together found out that with all our messing around with the distibuter its was 180* got that fixed and she fired without hesitation needless to say im stoked got a couple of little tweeks to do but she sounds and runs very healthy.
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post #7 of Old 09-02-2013, 05:50 AM
cruiser54
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Cool beans.

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

www.cruiser54.com

My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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post #8 of Old 09-02-2013, 03:26 PM
slickfreeze
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glad you got it figured out!

________oooo
//__l_l_,\____\,_____
l_/-\_l__l_/-\_|[]lllll[]|
_\_/==== |; _\\ \\
_(o)_)___(o)_)--o-)_)

"ask not what your country can do for you; ask what you can do for your country." John F. Kennedy
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