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#1 kbusch18

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Posted 20 January 2011 - 07:23 PM

so i recently swapped out my 87 inline 6 automatic for a 94 inline 6 automatic

me and my father kept most things original couple of sensor swaps

my question is it has a rough idle cold and warm

at some points when driving and come to a red light it will begin to act like its gonna putter and shut off but never does
and if i am at a stop sign on a down hill slope and try to excel up a hill it will have no pick up and act like its gonna shut off

is this something in the throttle body that needs to be cleaned
1987 comanche 4wd inline 6

#2 Pete M

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Posted 20 January 2011 - 09:50 PM

what do you mean by "couple sensor swaps"?

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1988 MJ with a 4.0, TJ ax-15/231, 78 Bronco dana 44/9", bumpers, rollbar, blah, blah blah...
A quick synopsis of my current and past MJs: http://www.cardomain.com/ride/330716

Pull up your carpet and check for rust before it's too late!!

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#3 mvusse

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Posted 21 January 2011 - 10:15 AM

What Pete said.

Also, are you sure the distributor is installed correctly and not off by a tooth (or more) on the drive gear.

Keep the original 87 computer? What about the knock sensor?
87 Comanche Pioneer 4.0 4x4 auto, Wilbur. 6.5" lift, Aussie lockers, Jawz JP Customs winch bumper, XRC10 winch and 35x12.50 Maxxis Mudders. Lots of cutting, lots of rust(holes), lots of dents.
87 Comanche 2.5 4x4 5 speed, The Purple People Eater, stock daily driver.
96 Cherokee Sport 4.0HO, Sparkles. mild lift, 32s, 2wd converted to Selec-Trac. Built for my daughter.

#4 kbusch18

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Posted 24 January 2011 - 11:19 AM

i switched out the sensors to make it run the basics for whatever a 94 needs to run

i don't have a knock so the knock sensor isnt needed but it is in

and the distributor is good as well the computer is original i was thinking something along the lines

of the intake manifold if somthing that regulates air to fuel needed cleaned idk
1987 comanche 4wd inline 6

#5 Pete M

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Posted 24 January 2011 - 11:27 AM

Did you retain the old 87 wire harness? Or did you swap in the new 94 wire harness? Or are you saying that you just swapped a block and transmission? Which intake did you use, old or new? Which distributor did you use, old or new? Which throttlebody? Which CPS?

Jeep on!
--Pete

1988 MJ with a 4.0, TJ ax-15/231, 78 Bronco dana 44/9", bumpers, rollbar, blah, blah blah...
A quick synopsis of my current and past MJs: http://www.cardomain.com/ride/330716

Pull up your carpet and check for rust before it's too late!!

Comanche Club can coozies are now available!


#6 kbusch18

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Posted 24 January 2011 - 04:45 PM

kept original wiring harness, i used the new distributor, i used old cps old intake, old throttle body
i just swapped engine no tranny
1987 comanche 4wd inline 6

#7 mvusse

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Posted 24 January 2011 - 06:06 PM

Sounds like a timing issue to me. I believe there is a difference between a Renix and a HO distributor. Since you're still using the Renix computer, you should be using the Renix distributor. Should also be using the knock sensor, although other people have successfully done without. I don't know what all sensors interchange between the two systems, but all the ones that don't should be swapped from the old engine onto the new.

Also, do the ports on the old intake manifold line up with the ports on the new head? I though Chrysler moved the ports up some.
87 Comanche Pioneer 4.0 4x4 auto, Wilbur. 6.5" lift, Aussie lockers, Jawz JP Customs winch bumper, XRC10 winch and 35x12.50 Maxxis Mudders. Lots of cutting, lots of rust(holes), lots of dents.
87 Comanche 2.5 4x4 5 speed, The Purple People Eater, stock daily driver.
96 Cherokee Sport 4.0HO, Sparkles. mild lift, 32s, 2wd converted to Selec-Trac. Built for my daughter.

#8 kyleag89

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Posted 24 January 2011 - 06:09 PM

You used the 87 intake and exhaust on the 94 head?
89 SWB Base 4.0 BA10 NP242 2" BB with 31s
93 Cherokee Country 4.0 AW4 NP231 4.5" RE lift
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#9 Pete M

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Posted 25 January 2011 - 02:15 AM

which flywheel tone ring did you use?

Jeep on!
--Pete

1988 MJ with a 4.0, TJ ax-15/231, 78 Bronco dana 44/9", bumpers, rollbar, blah, blah blah...
A quick synopsis of my current and past MJs: http://www.cardomain.com/ride/330716

Pull up your carpet and check for rust before it's too late!!

Comanche Club can coozies are now available!