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new engine(stroker) runs rough after 2500

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Old Oct 27, 2011 | 08:58 PM
  #16  
Jor2010dan's Avatar
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From: Southern Utah
Year: 1992
Model: Cherokee
Engine: 4.0 I6
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Humor me and watch the video. (no, I will never get a job reading books.)
I checked my injectors, they all clicky.


What am I missing?
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Old Oct 30, 2011 | 02:01 AM
  #17  
89 xj stroker's Avatar
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From: Utah
Year: 1999
Model: Cherokee
Engine: 4.7 stroker
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Did you build this motor yourself, or did you buy it?
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Old Oct 30, 2011 | 11:55 AM
  #18  
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From: Southern Utah
Year: 1992
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Engine: 4.0 I6
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It's my old block. I got it back as a long block, but I did everything else I could've done it by myself, but time has been an issue. I helped build a 350 from scratch this year
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Old Oct 30, 2011 | 04:47 PM
  #19  
89 xj stroker's Avatar
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From: Utah
Year: 1999
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Engine: 4.7 stroker
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Originally Posted by Jor2010dan
It's my old block. I got it back as a long block, but I did everything else I could've done it by myself, but time has been an issue. I helped build a 350 from scratch this year
I saw in your video description that you had the 4.2 crank with 4.0 rods. When you use the 4.2 crank your supposed to use the rods as well to compensate for the extra stroke, unless you got the special pistons that have the higher rod mount to compensate for the longer 4.0 rods. I hate asking this, but do you have the correct pistons?
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Old Oct 30, 2011 | 05:05 PM
  #20  
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From: Utah
Year: 1999
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Engine: 4.7 stroker
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Oh sorry, i just read it again and it looks like you do have the correct pistons, thats why i said i hated askin that question, cause anybody tearin down a motor like that should obviously know what they're doin. And anyways, from the video it looks like some sneaky gremlin stuck a a rev limiter at 2500 rpm on that thing while it was torn apart. Good luck figurin it out.
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Old Oct 30, 2011 | 05:51 PM
  #21  
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From: Southern Utah
Year: 1992
Model: Cherokee
Engine: 4.0 I6
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Whoops Sry I didn't put it here. Was the cps. Normally that causes a no start but it does control ignition and injectors. Some one mentioned that you can damage the cps while taking the engine out. That was what got me cause my engine was running fine (minus sounding like it had a missing connecting rod (was the torque converter bolts, but by the time we figured it out, the engine was already torn apart and hence, my stroker. ) I knew sensors don't just go bad. But yea, plugged a new one in and revved to four grand
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