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rough running new motor

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Old Apr 8, 2011 | 01:47 AM
  #31  
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Originally Posted by BRUNER247
no unusual noises just running real rough
Internal problem.

Cam not degree'd properly. Valves not opening or closing properly. Internal friction/interference. Wrong cam. Pistons have too much variance in weight compared to one another.

I may have missed this earlier, but have you verified true TDC on #1 on compression stroke, rotor pointing to #1 terminal on distributor cap?

Last edited by Firestorm500; Apr 8, 2011 at 01:55 AM.
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Old Apr 8, 2011 | 11:21 AM
  #32  
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ok i turned key on & off 3 times in 3 seconds and left it on the 3rd time to get codes manually. i got 2 codes 11=no engine speed sensor signal & 12=no output shaft sensor signal. i tried both these parts new yesterday. if my computer is on its way out would it throw bad signal to these?
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Old Apr 8, 2011 | 11:33 AM
  #33  
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Maybe, but is the crank sensor seated all the way? Or is the tranny not fully seated against the engine? Too much of an air gap will cause some funky signals. Just trying to help!
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Old Apr 8, 2011 | 11:34 AM
  #34  
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DRBII and be done
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Old Apr 8, 2011 | 01:23 PM
  #35  
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Originally Posted by Diesel
DRBII and be done
whats DRBII? the jeep is 18 miles from town,im 2hrs from home so hauling it to a garage would be VERY hard
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Old Apr 8, 2011 | 02:04 PM
  #36  
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DRBII is the god send of scan tools. Its about $6000, but most reputable shops will have it. Hook it up and it tells you everything. Just have to make sure they have Eagle adaptor or else they cant hook it to your xj.
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Old Apr 8, 2011 | 02:08 PM
  #37  
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id say cam position is wrong
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Old Apr 8, 2011 | 02:10 PM
  #38  
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And a DRBII will tell you that
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Old Apr 8, 2011 | 02:12 PM
  #39  
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sure would
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Old Apr 8, 2011 | 03:22 PM
  #40  
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that suks
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Old Apr 8, 2011 | 03:42 PM
  #41  
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DId you pull the CPS out before you put the engine back in? I damaged mine that way and it took me a week to figure out the problem, it would start but not run right.
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Old Apr 8, 2011 | 03:44 PM
  #42  
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well he said it wont even start. im thinking everything is out of time. try rotating the distributor 180 degrees
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Old Apr 8, 2011 | 04:32 PM
  #43  
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no it starts right up, has good compression, spark ect. i thought i might of bumped the crank sensor. i removed it,looks sweet,replaced with new one & still running rough. also i got 2 codes 11 & 12 i switch both cam pickup & crank,cleared computer & rechecked the codes now im only getting a 12code which is battery disconected in last 50 starts. plugs show running rich but not wet. bout to part it out
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Old Apr 8, 2011 | 04:47 PM
  #44  
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Originally Posted by xPlover24x
well he said it wont even start. im thinking everything is out of time. try rotating the distributor 180 degrees
distibutors on jeeps arent like chevys theres a tab that locates it to block
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Old Apr 8, 2011 | 09:40 PM
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What else could it be besides something internal?

How much you want for the whole thing?
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