Jeep still wont start after new motor - JeepForum.com
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post #1 of 17 Old 07-17-2004, 12:05 PM Thread Starter
TIM92300
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Jeep still wont start after new motor

My saga continues.. Swapped a new motor, long block, into my jeep after taking the old one for a swim. Everything hooked up fine, I cleaned all pieces and parts etc. Now it wont start. The motor was bought remanufactured new and the company had run it. I have spark, and fuel to the rail and on the plugs. I checked a double check the timing (TDC compression etc) and change fuel filter etc. All new plugs. Thought it might be flooded so let it sit and dry still nothing. Checked all wires, nothing pinched or broken. Checked electrical firing injectors and all is working. Even tried starter fluid (I know its bad but..) still didnt fire. That leads me to think that its firing and injecting fuel just not at the right time. Ive checked the Crankshaft positioning sensor and it looks ok, we did install the flywheel but everyhting looked ok. I dont think the ECU went under waterbut if it wasnt working i wouldnt expect to have fire and fuel. Im trying to fina a computer to read the codes cause it has to be something simple. The starter will turn the motor like it wants to start but kinda chugs and wont catch. I can smell burned fuel but something just isnt right. Any help is greatly appreciatyed. Ive been over it three/four times checkiong and Im at aloss and just trying to get it going. Thanks Ill keep you posted!


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post #2 of 17 Old 07-17-2004, 01:08 PM Thread Starter
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Oh yeah by the way its a 4.0L

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post #3 of 17 Old 07-17-2004, 01:40 PM
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can you pull any codes by turning the key on off on off on again the dash should blink the codes.

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post #4 of 17 Old 07-17-2004, 02:03 PM Thread Starter
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it gives me codes of 1-2-3-3-5-5,
From http://www.jedi.com/obiwan/jeep/dtc.html
12 says basically battery disconnect and then 33 means An open or shorted condition detected in the A/C clutch relay circuit. Since i dont have A/C im not sure what that means but im gonna look into it anyways
Then 55 is the end of codes

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post #5 of 17 Old 07-17-2004, 02:25 PM
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have you tried to advance the distributor maybe it to retarded?

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post #6 of 17 Old 07-17-2004, 02:37 PM Thread Starter
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no havent tried advancing the timing I just assumed that it would be ok from the factory and installed the distributor at TDC compression with the rotor toward #1 plug wire. I spose i might as well try advancing it and see what happens

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post #7 of 17 Old 07-18-2004, 12:01 AM
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i had a similiar problem when i did my motor (after taking it for a swim), got the new one in but couldnt get it to start. turned out we had the distributer dropped in 180 wrong, so we took it out turned it 180 drooed it back in, and it fired right up.
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post #8 of 17 Old 07-19-2004, 03:52 PM Thread Starter
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Quote:
Originally Posted by BLFD2274
i had a similiar problem when i did my motor (after taking it for a swim), got the new one in but couldnt get it to start. turned out we had the distributer dropped in 180 wrong, so we took it out turned it 180 drooed it back in, and it fired right up.
have triple checked and its not 180 off, drained gas checked/cleaned injectors JIC, new rotor and distrib JIC. Still no go. Its still def got spark and fuel but no go. Plugs smell like fuel but....

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post #9 of 17 Old 07-19-2004, 04:41 PM
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Did you bleed the fuel rail to get all the air out when you hooked up the new motor? Damn I'm stumped , Are you valve to tight? If there over tight then I know it wont run But damn you got spark and gas it should sputter or something? I would pull your valve covers off to see if you valves are opening and closing it sounds like they aren't . It 's kind of like a broken timming belt it will turn over with spark and gas but won't run.

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Last edited by KEVNISE; 07-19-2004 at 05:15 PM.
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post #10 of 17 Old 07-19-2004, 09:59 PM
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wow, your jeep seems to be doing the same thing mine is. It just won't start. An aquaintance of mine had a cherokee do this and it was the crank sensor. I replacedmy crank sensor and it STILL won"t start. I'm thinking coil or distibutor. I'll be working on it tomorrow and let you know waht happens.
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post #11 of 17 Old 07-20-2004, 06:28 AM Thread Starter
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Quote:
Originally Posted by Yjason
wow, your jeep seems to be doing the same thing mine is. It just won't start. An aquaintance of mine had a cherokee do this and it was the crank sensor. I replacedmy crank sensor and it STILL won"t start. I'm thinking coil or distibutor. I'll be working on it tomorrow and let you know waht happens.
Wow i cant believe theres more than me. Its been like a week and a half and im in the same boat. Do you have spark and fuel? Im thinking a sensor, crank, cam(stator), map, TPS or something cause it seems to be firing just not at the right time. Dont want to replace them all for nothing. I was thinking maybe the valves are too tight or something even though it was remanufactured and pre run, I can open the oil fill cap and see them moving but are they moving enough? My plugs get wet, not sure how much and i can smell burnt fuel. Im having someone else look at it whos got some knowledge too so ill let you know. Good luck with the battle, theres still some summer left!!

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post #12 of 17 Old 07-20-2004, 12:18 PM
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Quote:
Originally Posted by TIM92300
i can smell burnt fuel.
if you are smelling burnt fuel then you should have some sputtering or something.

you have checked your fire on the plugs? not just the fire going to the dist cap?

if each plug is firing, your plugs are getting wet and your timing is set w/in reason you should definately be getting some sort of result.

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post #13 of 17 Old 07-20-2004, 12:30 PM Thread Starter
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Quote:
Originally Posted by JKNIPE2000
if you are smelling burnt fuel then you should have some sputtering or something.

you have checked your fire on the plugs? not just the fire going to the dist cap?

if each plug is firing, your plugs are getting wet and your timing is set w/in reason you should definately be getting some sort of result.
I checked fire at the plugs and from the dist cap. It makes noise like it wants to catch (maybe 3 cyl firing?) but nothing. Its very puzzling. I called the place i got the longblock from to make sure it couldnt be the valves being to tight. They said theyve all been run tested etc... Im still not ruling out the valves. One of the puzzling things is that as much as i hate to admit using it since it burns so hot is that starter fluid in the intake did nothing more than without it. Im def learning a lot about MPI fuel injection and my electrical for future trail use but will it ever end. Ill be on it tonight so we'll see what happens. i do thank everyone for the help!!

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post #14 of 17 Old 07-20-2004, 02:08 PM
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i had a problem like that but mine was a busted distributer. the case was actaully broken in 2. and it caused the distributer to be out of time. did you use your original distrubutor or did it come with one?

sounds like it is not timed right. did you check spark at all 6 plugs or just one. are you sure that you checked TDC at #1 on compression not exhaust? did that one myself rather embarrising

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post #15 of 17 Old 07-20-2004, 04:30 PM
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EVEN if the timming is off it would be backfiring threw the carb and sputtering . I would check your wires make sure there right and try feeler gauge on the valves .`

90 wrangler weber carb nutter bypass 4" lift pro comp 4.2 liter 33" muds 411 gears

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