Question about 2000 Jeep Wrangler

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My 2000 jeep had a blown engine, I rebuilt it completely and it wont start. I have good compression and spark and fuel. timing marks are lined correct. is there any type of timing that I should know about? It's electronic, with no distributer. TDC on number one cylinder is set. I just dont know... It ran before the rebuild: even with 5 of the 6 cylinders running

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I've been in this situation, frustrating as it gets. You have all of the makings of a engine that should run, compression, spark and fuel. If compression is good that's a constant and you can rest that it is ok. You have good gas and spark with that is has to be within the timing of all. You mentioned being number one cylinder on TDC, it is possible to have this and be 180 deg. off (rather then the top of the compression stroke you may be at the top of exhaust stroke) I'd reinvestigate this be certain No. cylinder is on its compresson stroke. If need be remove the valve cover and look at the valves to be certain they are both closed with the piston fully up. I have not worked on this engine so I am uncertain of the lifter type manual or automatic, I raise this fact because I have worked on an engine where as the lifters did not fully fill with oil (had to maunally do this) because the lifters did not fully open the engine would hardly run if at all) something else to look at. Please let me know the results; again I have been in this situation and it seems she should fire right-up but instead your given grey hairs.
Best of luck,

Posted on Oct 04, 2009

  • Eddie Portillo May 26, 2012

    thanks Tom, I am headed back to the jeep now and possibly remove the valve cover. I did rotate 180 degrees from where I first thought TDC was on the compression stroke, but maybe 2nd times a charm. will let you know how it turned out. have a great memorial weekend.


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Run scanner for trouble codes, some auto parts store will do this for free 

Posted on Oct 04, 2009


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what engine Shawn. ? how can we guess that?
besides following the FSM steps, we could:
ive rebuilt many engines (done many from scratch) +machine work.

1: I check compression 1st. on all cylinders. (i put oil in the cyl, 1 teaspoon) (some pros run oil gallery primers pumps first in pro rebuild shops) i just crank the zero fuel engine until i see max oil pressure.)

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im 100% sure you can get here..... if you do the steps.
Now comes, light the fires and kick the tires. not FIRST.

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why do this , with pump dead.
Answer to not wreck your new rings, all washed free of all oil buy
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i get all my injectors firing then , turn the fuel pump on.
its your hard labor, 50 hours? to build and engine?
wana waste all that? nah.
I last , plug my fuel pump back in,
does the PCM start enging for 2 seconds, and then cuts fuel?

ive never burned up a new engine, yet,
im not lucky, or smart, just had good teachers.

jeep ways!
I kill my pump by pulling the pump feed wire.
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