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  #41  
Old 06-05-2022, 06:42 PM
devildog80's Avatar
devildog80 devildog80 is offline
258 I6
 
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We did pull the MSD off, and all back to OEM with new ICM and new coil.

We checked, and have, full voltage to and out of ICM, over to passenger fender. Just do not get circuit complete through coil, with voltage to + side.

Checked coil ground...have good ground.....

WHY WHY WHY......... :/
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #42  
Old 06-05-2022, 09:48 PM
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rang-a-stang rang-a-stang is offline
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If you pull the pickup connector, there are 2 wires. If you connect a multimeter across those two wires and crank the motor over, you should see slight voltage spikes as the rotor turns past the pickup. Its only a tiny bit though so you have to set your multimeter to (I think) millivolts.

That stock dizzy is a Ford Duraspark. If you look up "Duraspark pickup test" there are a few other tests you can run, too. I replaced mine a while ago and it was pretty cheap (i want to say less than $20?).
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11 Nissan Pathfinder Silver Edition 4x4
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00 Baby Cherokee
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  #43  
Old 06-06-2022, 09:49 AM
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devildog80 devildog80 is offline
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Thanks, and going to test it.

For that much, not a bad investment in prevention

Mongo228 has an ICM wiring harness coming too, as that would eliminate the factory nightmare of random splices we found, to make sure we are dead on with connections.

Fingers crossed.....
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #44  
Old 06-09-2022, 01:05 PM
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devildog80 devildog80 is offline
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Join Date: Apr 13, 2022
Location: Apache Junction AZ
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Have some of the parts that came with the truck listed in classifieds.
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #45  
Old 06-18-2022, 12:43 PM
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devildog80 devildog80 is offline
258 I6
 
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Location: Apache Junction AZ
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Well........

Mongo228 and I replaced OEM - PO wiring for ICM with Painless Harness.....still no spark.

Diving into the distributor pick up coil, as this is the last thing not changed, but does test good?

Constant ohm's at 692 across outside terminals at the plug, but investigating further.
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #46  
Old 06-18-2022, 09:55 PM
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cu4whln cu4whln is offline
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Dang..

I hate electrical bugs.. sooo frustrating !
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It's not yours 'til ya bleed on it . . .

1977 "401" 'Da Chief
1979 Chero: "Madness" [Sold]
1985 CJ : Renegade -locked and loaded
2005 Unlimited Rubicon - Built
2001 XJ : Driver - 2016 JK 2 door

'Da Chief here: http://www.ifsja.org/forums/vb/showt...ighlight=chief

Round 2- LT Swap: 'Da Chief:
http://www.ifsja.org/forums/vb/showthread.php?t=188457

"Madness" build here:
http://www.ifsja.org/forums/vb/showthread.php?t=89280
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  #47  
Old 06-19-2022, 12:01 PM
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devildog80 devildog80 is offline
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Mongo228 said to me part ways into the rewire yesterday....."If this does not work, we are dragging it out into the desert, and light it on fire" :/

Tried to encourage him to NOT do that.

Guess it is what you get, with these old trucks

It WILL live again!
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #48  
Old 06-19-2022, 12:05 PM
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devildog80 devildog80 is offline
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Join Date: Apr 13, 2022
Location: Apache Junction AZ
Posts: 295
Suspect the distributor might be our weak link now, after wiring and power feed has all been verified.

Just absolutely no spark through coil.
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #49  
Old 06-19-2022, 03:45 PM
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78 WIDETRAC 78 WIDETRAC is offline
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Location: Portland, Or
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Quote:
Originally Posted by devildog80
Suspect the distributor might be our weak link now, after wiring and power feed has all been verified.

Just absolutely no spark through coil.

I know you probably looked at this thoroughly, I only noticed the hard brittle cracked wires on my original distributor when I removed it. Cracked 1/2 way between the distributor body and plug, right where the wires rest on the manifold. I honestly would have never noticed them had I not removed the distributor.

Last edited by 78 WIDETRAC : 06-19-2022 at 04:16 PM.
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  #50  
Old 06-19-2022, 05:14 PM
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devildog80 devildog80 is offline
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That is a possible fault point, so we replaced the OEM wiring with new ICM harness, and looking at distributor pickup sensor now.

At least I know there is new wiring on the male plug side, and hope we find our trouble with the pickup wiring, but not too hopeful.

The pickup tests ohms, off the connector blades within limits, so yes pulling the distributor is probably our next step.

Thanks for the idea

Need all we can get!
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #51  
Old 06-22-2022, 01:21 PM
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devildog80 devildog80 is offline
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Location: Apache Junction AZ
Posts: 295
Also thinking of doing distributor recurve, while on the bench trouble shooting.
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #52  
Old 06-22-2022, 02:43 PM
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rang-a-stang rang-a-stang is offline
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You shouldn't need a whole new dizzy. The pickup is cheap and easy to replace. I think I bought an MSD one, and it was like $40... took maybe 15 minutes to install?
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11 Nissan Pathfinder Silver Edition 4x4
09 Mazdaspeed3 Grand Touring
00 Baby Cherokee
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  #53  
Old 06-22-2022, 02:48 PM
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devildog80 devildog80 is offline
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Correct no new dizzy needed, recurve you can use a factory distributor, as it is primarily just changing one or both of the springs down in the bottom.

Brings your power curve in at lower rpm.

That is what I took from the youtube vids I watched, with this one being most informative.

https://www.youtube.com/watch?v=7jFlXBCtNCM
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #54  
Old 06-22-2022, 03:57 PM
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sierrablue sierrablue is offline
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Probably a dumb question here, but how do the other components of the ignition system look? You said you've been through all of the 12V stuff--but what kind of shape are the cap, rotor, plug wires, and plugs in? Is it possible that the plugs got gapped too far? Obviously you're working on making the distrubutor basically brand new, but just other things to double check if it still won't fire.
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Current Rig:
'71 Wagoneer (DD)
B350/TH400/D20
open knuckle D44 front (disc brakes)
6-lug conversion rear
http://www.ifsja.org/forums/vb/showt...79#post1734879

Previous Rig:
Tan '88 Grand Wagoneer
.030 over 401, TBI, headers
3" exhaust
31x10.5s
2" rear lift blocks
custom headliner
http://www.ifsja.org/forums/vb/showt...77#post1734777

"The engineering side of me says that it's more than strong enough. The redneck side of me says that it's going to fall apart and I need to beef it up."--somebody I know
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  #55  
Old 06-22-2022, 04:13 PM
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devildog80 devildog80 is offline
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Everything pre distributor has been checked, and now replaced new, and still no spark to the coil.

Not even looking at plugs yet, until I can get spark to pop from coil to distributor.

Distributor/cap/wires are clean and in good shape, but pulling it to be sure gear is ok, then check pickup to make sure it is good.

At same time, will change one of the springs in the bottom for recurve, then when we get it to fire, will regap all the plugs from MSD setting, now back to new ICM settings.

Even at MSD gap settings on plugs, we should be able to have spark from coil, which is our issue.

Replaced battery, start switch under dash, ICM, new ICM harness, coil.

Verified and checked on my CJ5 the new coil, existing coil wire, spark checking tool, that these all worked. Put them back on Wagoneer and no spark.

That leads me to distributor being the only thing we can see, that would cause a no spark issue. Ohms checks ok on distributor pickup, but forgot to rotate it when meter connected.

Thanks for the thought, and still open to any/all info to try and get this issue resolved
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #56  
Old 06-28-2022, 07:10 PM
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78 WIDETRAC 78 WIDETRAC is offline
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Still nothing for spark? I'm surprised. If you want to try a different distributer all together I'd be willing to send you a known good one out of an 86 I parted out. FREE!
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  #57  
Old 06-28-2022, 07:18 PM
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devildog80 devildog80 is offline
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Location: Apache Junction AZ
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Correct....still no spark, and still need to trouble shoot the distributor, but will not decline an offer like that.

I will PM you

Thanks a bunch
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #58  
Old 06-28-2022, 07:32 PM
78 WIDETRAC's Avatar
78 WIDETRAC 78 WIDETRAC is offline
350 Buick
 
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Location: Portland, Or
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Something in my head that's just lingering is the wiring by the oil sender.

I can't recall if it's a safety thing so I can't fire with no oil pressure. Look into that too.

Somebody will know what its called and the exact purpose I'm sure. I'll crawl under my jeep and post a pic of what and where I'm talking about.
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  #59  
Old 06-28-2022, 07:35 PM
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devildog80 devildog80 is offline
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I do know what you are talking about, as I have that on my '81 CJ5 too.

Definitely check that, as never crossed my mind.
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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  #60  
Old 07-04-2022, 10:55 AM
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devildog80 devildog80 is offline
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No progress......too gosh darn hot right now!

More to come......
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'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31, 4" high arc spring lift

'84 Grand Wagoneer, 401 V8 (.030 over), MC2150 HA Comp, 727 auto, Selec-trac NP229, AMC 20 REAR - D44 FRONT - WT 3.31, 4" high arc spring lift

Rather be driving, than waiting to be modified
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