Re: gettin spark for a second
[Re: Jjs72D]
#2257145
02/21/17 01:40 PM
02/21/17 01:40 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
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Circle Track
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what I would do is with some made up jumper wires with alligator clips/specific terminals as needed I would jump from a 12V source like the batt stud on the starter relay to/thru the ballast to the coil/ECU (duplicate ALL of the ign1/ign2 circuits) & pull the ign2 wire when (if) it starts. this takes the wiring completely out of the picture & only leaves the hard components which most you have replaced then if we are good so far we can start to remove one jumper at a time & restart it to pin down which circuit has the open or intermittent connection.
live every 24 hour block of time like it's your last day on earth
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Re: gettin spark for a second
[Re: mopar muscle7271]
#2264796
03/07/17 12:09 PM
03/07/17 12:09 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
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With (3) jumpers jump from the "batt" stud on the starter relay to: (1) blue/yellow terminal on the ECU pentastar connector (stick a thin/sharp pin into it) and (2) to the upstream (blue wire) end of the ballast and (3) and to the coil positive primary terminal. start it with the key & when (if) it starts then remove jumper #3. I'm assuming this is a 4 pin ECU??
live every 24 hour block of time like it's your last day on earth
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Re: gettin spark for a second
[Re: mopar muscle7271]
#2265415
03/08/17 04:11 AM
03/08/17 04:11 AM
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Joined: Jul 2013
Posts: 468 las vegas,nv
mopar muscle7271
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mopar
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OP
mopar
Joined: Jul 2013
Posts: 468
las vegas,nv
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How come i have very weak spark on the positive side of coil? when i run a hotwire from the positive side to battery to positive of coil i have good spark goin to it.what could be bad causin very little spark to not producing continuous spark with out hotwire?
Last edited by mopar muscle7271; 03/08/17 04:16 AM.
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Re: gettin spark for a second
[Re: mopar muscle7271]
#2265890
03/08/17 11:20 PM
03/08/17 11:20 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
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You have a poor connection between the ign2 (crank) terminal on the ign switch and the coil (& maybe the ign1 "run" circuit also which is why when you bypass it with your jumper it starts. start with the bulkhead (a frequent culprit). Might be low voltage AT the ign switch (it has a connector which can be problematic but nothing like the bulkhead). A small metal bristle brush is good for the male ones and a spare male terminal for the female ones (the ones on both halves of the bulkhead). spray clean em when done. NAPA male ones are 725145 if you dont have any spare wiring/terminals laying around-99 cents ea.
live every 24 hour block of time like it's your last day on earth
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Re: gettin spark for a second
[Re: mopar muscle7271]
#2266128
03/09/17 12:07 PM
03/09/17 12:07 PM
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Posts: 36,041 Lincoln Nebraska
RapidRobert
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Your sayin bulk head for the engine harness section? yes the bulkhead on the firewall that has the blue ign1 run and ign2 crank circuits.
live every 24 hour block of time like it's your last day on earth
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Re: gettin spark for a second
[Re: mopar muscle7271]
#2266441
03/09/17 10:08 PM
03/09/17 10:08 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
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grab or make 3 jumpers & get it running (pull the one when it starts) then we can work to pin down which circuit has a bad connection & then pin down (further) where in that (particular) circuit the bad connection is.
live every 24 hour block of time like it's your last day on earth
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Re: gettin spark for a second
[Re: mopar muscle7271]
#2266471
03/09/17 10:53 PM
03/09/17 10:53 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Posts: 5,399
Aurora, Colorado
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You could pull the dist, and spin it by hand to see if you get a spark in both the start and run key positions, just disconnect the neutral safety wire from the start relay, or put trans in gear other than park or neutral so the starter does not spin when in the start key position. If you get spark spinning the dist by hand in both positions, the problem is not the ignition or the wiring to it, but a problem with voltage drop when the starter load is applied.
If you don't get a spark spinning the dist by hand, then there is a problem in the wiring, dist pickup, or with the ECU.
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Re: gettin spark for a second
[Re: 451Mopar]
#2266474
03/09/17 10:55 PM
03/09/17 10:55 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
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^Excellent info^ EDIT & if you have another dist handy (even a /6), plug it in first & spin it for an easier start to this path.
Last edited by RapidRobert; 03/09/17 10:56 PM.
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