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Unread 03-22-2013, 08:11 PM   #1
blu3fan
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1992 XJ Cherokee 
 
Join Date: Jun 2008
Location: california
Posts: 105
Question 4.7 stroker problems

ok so here goes.
i got a 92 cherokee xj 4.0 inline 6
bored it 30 thou over stroked to 4.7
skat crank
comp cams K68-231-4 cam
mopar valvetrain
new stock pushrods
pistons and rods i dont know got them off ebay but they were good quality
yella terra 1.6 roller rockers
flowcooler water pump
upgraded oil pump
mustang injectors
new spark plugs reused distributor
so heres what happened.
about four years ago we pulled the motor. and rebuild it. life happened and the car ended up sitting. i got the motor back into it in december of last year. fired fine on startup
so heres the list of things wrong.
1. rear main seal is leaking oil between transmission and engine. <-- i can just pull the oil pan and snake another in correct ?
2. electrical issues. theres a drain. batteries die after 5 days sitting in car its a slow one but there is one. im thinking i hooked up a wire off the alternator to the wrong spot
i need a wiring diagram for the wires off the alternator, also theres a wire coming out of the fusebox. i routed it to the battery post. correct ?
lights blinkers and dash lights etc doesn't work while car is running. but work fine if engine is off
3. valve train is noisy, Ive heard comp cams cams are loud, or could there be an issue ?
4. the big one.
so. car has trouble starting. sometimes have to crank and hit gas for a good few seconds before she finally turns over.
when she starts she idles really low for a warmup. engine feels like its surging. if i hit the gas. when it gets to about 2400/2900 it does what seems like a misfire/backfire and rpms literally drop off it jumps from 2900 to 2400 in a second. it smells like gas.
we did a fuel pressure test seems fine. i need to do a fuel volume test on it. how would i do that ?
the gas that was sitting in the tank (4/5 gallons) i pumped out. filtered and put into another car. there was orange goo in it, so i changed the fuel filter
still same issue.
so now im thinking it may be the fuel pump, yes i have the tank skid so its not fun for a maybe to be pulling the tank down.
anyone have any ideas ?
im thinking it smells like gas and drops of cos theres not enough fuel to ignite so it misfires because the pump maybe is blocked by crap left over in the tank or maybe my 210000mile old pump is dying.

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Unread 03-28-2013, 11:55 AM   #2
blu3fan
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1992 XJ Cherokee 
 
Join Date: Jun 2008
Location: california
Posts: 105
re did the timing. no luck yet
ideas anyone ?
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Unread 04-01-2013, 08:40 PM   #3
kw89425
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1986 CJ7 
 
Join Date: Jul 2008
Location: ky
Posts: 1,145
Its not all of your problems but if it sat 4 years after it was put together and valves adjusted it needs new springs.
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Unread 04-03-2013, 02:37 PM   #4
foggybottombob
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1984 CJ7 
 
Join Date: May 2008
Location: Monument Colorado
Posts: 5,825
You might get more help here:
http://www.jeepstrokers.com/forum/
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Unread 04-05-2013, 04:38 PM   #5
blu3fan
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1992 XJ Cherokee 
 
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Location: california
Posts: 105
allready posted there.
its something stupid i know it.
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Unread 04-05-2013, 04:46 PM   #6
blu3fan
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Unread 04-08-2013, 07:14 AM   #7
foggybottombob
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1984 CJ7 
 
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Location: Monument Colorado
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What do you have for a fuel regulator? Is the fuel regulator leaking?
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Unread 07-29-2013, 02:38 PM   #8
CZDiesel
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2006 LJ Wrangler 
 
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Did you ever get it figured out?
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Unread 07-30-2013, 12:47 PM   #9
blu3fan
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1992 XJ Cherokee 
 
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Location: california
Posts: 105
it ended up being an issue with timing. had to hack up the distributor and manually set it.
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Unread 07-30-2013, 05:03 PM   #10
CZDiesel
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2006 LJ Wrangler 
 
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So, how does she run?
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