1985 Jeep CJ7 Electrical Nightmare

Tiny
DEGENERATE34
  • MEMBER
  • 1985 JEEP CJ7
  • 4.2L
  • 6 CYL
  • 4WD
  • MANUAL
  • 85,000 MILES
Im looking for a man named "The Medic", obviously anyone with knowledge on this is more than welcome to comment.

I bought this Jeep about 28 months ago, but have been deployed about 20 of those months and havent really had time to put serious work into the thing. However, I have taken it to shop after shop trying to chase down answers to the electrical issues. It was backfiring and losing a lot of power, so I took it to the first shop and was told it needed a new coil. Off brand Coil Installed. Then it completely failed. On my way home from work one day, I was going up hill, and as I would give it gas it would bog down until finally it backfired and cut off. It then stopped working until I got the ignition coil replaced again. MSD 2 installed. After a few months of running (poorly) and having a few other things replaced, I brought it to the shop to have some random electrical things fixed such as converting the push button start back to a key start and other things. There, the mechanic told me that when the key is left in the ACC. Position the distributor would begin to smoke. He said that it needed a new wiring harness because the one it had was the wrong one. I told him that I would do it myself (instead of paying for 22 hours of labor). I purchased a Painless wiring harness, and after a couple weeks of putting in time after work I had it installed. The entire time I couldn't help but realize that the wiring harnesses looked exactly the same, and while following the instructions and contacting the staff at Painless I also noticed the harness was hooking up the exact same way as the one I pulled out. Once completed, I attempted to start the jeep and the distributor began to smoke again. You can imagine my frustration after buying a 750 dollar wiring harness in vein. A year and 2 more deployments later I am trying to convince my wife to keep it, but shes got a point why keep a jeep that never runs that I dont drive. I WANT HER TO BE WRONG.
Do you
have the same problem?
Yes
No
Monday, October 6th, 2014 AT 5:32 PM

5 Replies

Tiny
CJ MEDEVAC II
  • MEMBER
OKIE-DOKIE FELLER

LOOKS LIKE WE ARE GONNA BE PALS FOR A GOOD WHILE IN THE EVENINGS!

THINK IT'S POSSIBLE TO REVERT BACK TO THE ORIGINAL IGNITION SYSTEM?

I RECKON YOU HAVE READ THRU SOME OF MY STUFF?

I'LL BE GLAD TO ASSIST ALL I CAN, AND AS LONG AS YOU KEEP RESPONDING!

DO YOU NEED A DIAGRAM OF HOW THE ORIGINAL IGNITION GOES OR DO YOU HAVE THAT WITH YOUR NEW WIRING HARNESS?

WHAT REGION ARE YOU IN? ARE YOU ANNUALLY CHECKED?

ANY MODS TO THE CARB?

THANKS FOR ASKING FOR ME - GIVES ME A WARM FUZZY!

I TOLD MY DATE, 10 YEARS AGO, THAT "ME AND MY JEEPS ARE 'ONE', CAN'T LIKE ME, UNLESS YOU LIKE MY JEEPS". NOW MARRIED, SHE MUST STILL WORK HARD TO TRY TO COMPETE WITH THEM!

YOUR TURN

THE MEDIC (ACTUALLY "CJ MEDEVAC", THROWED THE MEDIC PART IN TO GO ALONG WITH THE MEDEVAC)
Was this
answer
helpful?
Yes
No
Monday, October 6th, 2014 AT 6:17 PM
Tiny
DEGENERATE34
  • MEMBER
Yeah brother I do have a diagram of the wiring harness, it came with the new one. When you say revert back to the original ignition though, what exactly do you mean?

The only mods for the carb. Are a removed electric choke. So not really.

Im in the Southeast Uhwarrie area. And I am not annually checked.

The only thing I have come up with at this point is that it may need a new ignition module. However, I refuse to spend another dime until I talk to somebody who knows what the hell they are talking about.
Was this
answer
helpful?
Yes
No
Monday, October 6th, 2014 AT 6:33 PM
Tiny
CJ MEDEVAC II
  • MEMBER
SOUNDS LIKE YOU MAY BE 5 OR SO HOURS FROM HERE

BEDTIME, SEE YOU TOMORROW!

THE MEDIC
Was this
answer
helpful?
Yes
No
Monday, October 6th, 2014 AT 6:57 PM
Tiny
CJ MEDEVAC II
  • MEMBER
OK BOSS

THIS IS WHAT I WANT YOU TO LOOK OVER

THESE PICS WERE INTENDED TO HELP SOMEONE ELSE - HENCE, SOME OF THE WRITING I PUT ON THEM, DISREGARD THINGS I'M NOT EXPLAINING TO YOU

HERE'S WHAT I WANNA KNOW FOR NOW

1) IN YOUR NEW HARNESS, IS THE "RESISTANCE WIRE" PRESENT, OR IS IT JUST A PLAIN OLD WIRE? (THEY LOOK THE SAME)

2) MY DIAGRAMS ARE OF A 1979 (VERY CLOSE TO YOURS)

IN PIC 1 YOU WILL SEE I CIRCLED 4 WIRES (THIS WAS THE "STANDARD", UNTIL THE CRAPPY COMPUTER WAS PUT IN IN LATER YEARS)

THE "BLACK WIRE" RUNS THRU THE COMPUTER ON YOURS AND DOES NOT ROUTE IN LIKE THE 1979

WE WILL CHANGE THAT - THEN THE COMPUTER CANNOT "BARGE IN" AND KILL THE IGNITION

THIS IS SOMETIMES KNOWN AS THE NUTTER BYPASS - I'VE ALWAYS JUST CALLED IT BYPASSING THE COMPUTER, BEFORE SOMEONE NAMED IT

I'LL SHOW YOU HOW AFTER YOU GET YOUR DISTRIBUTOR BACK IN AND THE IGNITION MODULE IN. IT'S PRETTY EZ

STILL GOT YOUR ORIGINAL DISTRIBUTOR?

NEED HELP RE-INSTALLING IT CORRECTLY?

OUT OF THE 7 JEEPS I'VE OWNED (1 BEING "WILLY") AS FAR AS PLAIN OLD TRANSPORTATION (NOT RACING, ETC) THE BEST IMPROVEMENTS I'VE EVER MADE HAVE BEEN MY

A) OFFENHAUSER 4 BARREL INTAKE

B) MY HOLLEY 390 CFM 4 BARREL CARB - 18 MPG, THE POWER IS THERE IF NEEDED

C) MY "TRUE DOUBLE ROLLER" TIMING CHAIN

D) MY TRAIN HORN!

E) I HAVE MADE MANY OTHER "USER FRIENDLY" IMPROVEMENTS TO MY PRESENT 1977 CJ-5, IF YOU FLIP THRU THE 2CAR CJ 5 & 7 FORUMS, YOU ARE BOUND TO SEE A BUNCH OF 'EM

I'M NO SCIENTIST, NOR DO I HAVE A DYNO! OUT OF ALL OF THE IGNITION UPGRADES THAT I'VE SEEN FIRST HAND, I REALLY NEVER SAW IMPROVEMENTS ABOVE THE ORIGINAL. SURE THEY LOOK COOL, BUT WHEN IT'S TIME MAKE A REPAIR OR GET A PART, IT'S A REAL PAIN. I'VE BEEN STRIVING FOR THE BEST MPG FOR YEARS, AND IF I GET MORE POWER IF I GET ON IT, THAT'S OK TOO! I'VE TRIED SO MANY "INCREASED MPG PROMISE ITEMS" (LIKE HE TORNADO AND SPLITFIRE PLUGS, ETC, ETC)

I RECKON YOU ARE PRETTY DARN CAPABLE OF KEEPING UP WITH ME IF YOU WERE ABLE TO INSTALL A "PAINFUL WIRING HARNESS"!

HOW DO YOU WANT TO APPROACH THIS? LEMME KNOW WHAT YOU WANNA START ON

THE MEDIC
Was this
answer
helpful?
Yes
No
+1
Tuesday, October 7th, 2014 AT 7:13 PM
Tiny
CJ MEDEVAC II
  • MEMBER
ANY SORTA NEWS ON HOW THINGS ARE GOING?

THE MEDIC
Was this
answer
helpful?
Yes
No
+1
Wednesday, October 22nd, 2014 AT 6:55 PM

Please login or register to post a reply.

Recommended Guides