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Unread 09-27-2010, 08:33 PM   #76
CJHVN
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1985 CJ7 
 
Join Date: Jan 2005
Location: Duluth, Minnesota
Posts: 130
Thanks Alfons. However I'd hate to start a new thread at this point. There's a lot of really good information here for someone having the same issues.

FYI, I rebuilt the engine before swapping it into my CJ. I have a fear that my "Chevy" buddy might have installed the timing chain incorrectly.

The way I have it set right now, it starts and runs pretty smooth. But even the slightest movement of the distributor will disturb this and it won't run.

I am beginning to think you guys are right about the TPS causing the hesitation. I'm going to test it tomorrow before I go get another one, but for $30 I can deal with replacing it if it fixes the problem.

I have good pressure at the rail at start-up, idle, and with throttle. The fuel pump is a brand new Ford 2100 pump.

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85 CJ-7, 4.0L, twin stick/clocked flat Dana 300, SOA, 36" TSL's, 30/44 locked, Warn X8000i

92 XJ, 4.0L, AW4, Dropped NP231, 30/8.25, 4" DPG Hybrid lift, 33" MT/R's, JKS trackbar, JKS discos, OME Nitro Shocks, stinger bumper, Warn X8000i, etc. (work in progress)
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Unread 10-07-2010, 09:42 AM   #77
CJHVN
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1985 CJ7 
 
Join Date: Jan 2005
Location: Duluth, Minnesota
Posts: 130
Update

Just a quick update. It's running like a champ now.

I rechecked that I was at TDC, reinstalled the distributor EXACTLY according to the FSM and it fired up perfectly and purrs like a kitten.

I can't tell you what the exact fix was, but I can only assume that I must have been a tooth off on the distributor or something.

Anyway, I now know more than I ever wanted to know about my 4.0L swap, distributor issues, and the wiring. I guess it's a good thing, but my brain is FULL!

Good luck to the rest of you on your swaps!
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85 CJ-7, 4.0L, twin stick/clocked flat Dana 300, SOA, 36" TSL's, 30/44 locked, Warn X8000i

92 XJ, 4.0L, AW4, Dropped NP231, 30/8.25, 4" DPG Hybrid lift, 33" MT/R's, JKS trackbar, JKS discos, OME Nitro Shocks, stinger bumper, Warn X8000i, etc. (work in progress)
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Unread 06-08-2013, 01:27 AM   #78
Jeeper_YJ
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Join Date: Apr 2010
Location: Las Vegas
Posts: 559
What is the timing? I used a timing light and its 4* BTDC. I think its wrong. I think I read here its 14*? Am I off a tooth?
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'97 Cherokee, 99+ intake, 62mm TB, 703 injectors (new), k&n intake, Hypertech III, 180* stat (1/8" drilled hole), 2.5" manifold 2 tail pipe (Hooker Maxflow & hi flow cat), Perf header, 4.5" zone lift, 32" GY Dura Trac, Rear head rests. Comp cam "231" & Perf head (LS1 BIG valves 2.02/1.62). 3 row alum radiator.
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Unread 06-08-2013, 07:59 AM   #79
CJHVN
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1985 CJ7 
 
Join Date: Jan 2005
Location: Duluth, Minnesota
Posts: 130
I would go back to the first page of this thread and look closely at the distributor placement and timing procedure. That's what I did and it has worked for me. I wouldn't rely on the timing marks and/or timing light if your distributor or timing chain could be off or installed incorrectly.
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85 CJ-7, 4.0L, twin stick/clocked flat Dana 300, SOA, 36" TSL's, 30/44 locked, Warn X8000i

92 XJ, 4.0L, AW4, Dropped NP231, 30/8.25, 4" DPG Hybrid lift, 33" MT/R's, JKS trackbar, JKS discos, OME Nitro Shocks, stinger bumper, Warn X8000i, etc. (work in progress)
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Unread 06-08-2013, 08:54 AM   #80
UZI4U
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1993 YJ Wrangler 
 
Join Date: Aug 2011
Location: Black Hills, Daschle & Herseth-free SD
Posts: 504
I haven't had a timing light for decades: http://www.classicinlines.com/Vacuum.asp
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