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Re: Losing voltage somewhere
[Re: mopower440]
#1684534
10/22/14 07:00 PM
10/22/14 07:00 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I would (1) fully charged batt (2) hold the coil secondary wire (dist end) 1/4" from the intake (ground) (3) have a helper crank it with the ign key & see if you have a healthy spark (ign2 crank circuit) (4) have him let off the key back to "on" position (5) you jump the SR with a wrench in 1 hand & see if the coil wire has a good spark in your other hand (ign1 run circuit) (6) if OK then check/clean the plugs (7) see if it will start with proper amount of choke/minimal amount of pedal pumping (you're familiar with what it normally needs). Holler when you can
live every 24 hour block of time like it's your last day on earth
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Re: Losing voltage somewhere
[Re: mopower440]
#1684536
10/22/14 07:35 PM
10/22/14 07:35 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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the large (7 or 8 mm) insulated wire from the coil to the dist cap center terminal. Twist/pull/remove the dist end of it & hold it 1/4" from the intake manifold metal surface
live every 24 hour block of time like it's your last day on earth
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Re: Losing voltage somewhere
[Re: RapidRobert]
#1684537
10/22/14 09:30 PM
10/22/14 09:30 PM
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Joined: Jan 2003
Posts: 2,863
middle Tennessee
mopower440
OP
master
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OP
master
Joined: Jan 2003
Posts: 2,863
middle Tennessee
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Quote:
the large (7 or 8 mm) insulated wire from the coil to the dist cap center terminal. Twist/pull/remove the dist end of it & hold it 1/4" from the intake manifold metal surface
ok i have done both tests cranking and in run and it is indeed sparking. I kinda expected a harder spark tho but not really sure how strong these ignitions were.. Im used to GM ignitions making a snapping sound when doing something like this because they are so strong..This did not make any snapping sound at all, but again, im not sure how strong these stock electronic ignitions are supposed to be..
I didnt have time to pull the plugs and clean them off yet.
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Re: Losing voltage somewhere
[Re: mopower440]
#1684538
10/22/14 09:36 PM
10/22/14 09:36 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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what color was the spark? yellow or blue/yellow or blue
live every 24 hour block of time like it's your last day on earth
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Re: Losing voltage somewhere
[Re: mopower440]
#1684540
10/22/14 10:24 PM
10/22/14 10:24 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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check/clean the plugs/appropriate # of pumps/correct choke setting/fire that puppy up
live every 24 hour block of time like it's your last day on earth
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Re: Losing voltage somewhere
[Re: mopower440]
#1684542
10/22/14 10:51 PM
10/22/14 10:51 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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yes the HEI puts out one hell of a spark but the OE mopar setup will start/run OK & the voltage drop here from the poor electrical connections is making the spark somewhat weaker but blue/yellow should be enough to fire. I would correct the voltage drops so you dont have to use the jumper as the hard components are adequate enough as it does fire when you jump it
live every 24 hour block of time like it's your last day on earth
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Re: Losing voltage somewhere
[Re: RapidRobert]
#1684543
10/22/14 11:01 PM
10/22/14 11:01 PM
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Joined: Jan 2003
Posts: 2,863
middle Tennessee
mopower440
OP
master
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OP
master
Joined: Jan 2003
Posts: 2,863
middle Tennessee
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Quote:
yes the HEI puts out one hell of a spark but the OE mopar setup will start/run OK & the voltage drop here from the poor electrical connections is making the spark somewhat weaker but blue/yellow should be enough to fire. I would correct the voltage drops so you dont have to use the jumper as the hard components are adequate enough as it does fire when you jump it
according to what ive read, the ballast should bring the voltage do 5.5-6 volts in 'Run', mine is 5.6 in run, so thats fine. The problem is when cranking, it should be 12 volts and its only 7.7. I would like to rewire the cranking circuit so the voltage will be right when trying to start it. Do you know where i would run the new wire?
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Re: Losing voltage somewhere
[Re: mopower440]
#1684544
10/22/14 11:30 PM
10/22/14 11:30 PM
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Joined: Jan 2003
Posts: 1,490
smyrna,tn
draginmopars
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,490
smyrna,tn
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do you have 12v at the ignition switch there is a dark blue wire with a welded splice, i have found bad 
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Re: Losing voltage somewhere
[Re: mopower440]
#1684547
10/23/14 01:58 PM
10/23/14 01:58 PM
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Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
Sxrxrnr
pro stock
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pro stock
Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
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Have you separated the connector that ties steering column wiring(from ignition switch) to wiring harness that feeds starter/ignition circuit?
There are 6 main wires, blue, red, brown, yellow etc. One of these 6 is only energized when ignition switch is in 'start' position thereby bypassing ballast and going directly to coil positive. I forget which one,,,test light or schematic will tell you.
If connection for that wire at the connector is not solid, wiil cause exactly the problem you are experiencing. Same goes for bulkhead connection for this wire.
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Re: Losing voltage somewhere
[Re: Sxrxrnr]
#1684548
10/23/14 03:39 PM
10/23/14 03:39 PM
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Joined: Jan 2003
Posts: 2,863
middle Tennessee
mopower440
OP
master
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OP
master
Joined: Jan 2003
Posts: 2,863
middle Tennessee
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Quote:
Have you separated the connector that ties steering column wiring(from ignition switch) to wiring harness that feeds starter/ignition circuit?
There are 6 main wires, blue, red, brown, yellow etc. One of these 6 is only energized when ignition switch is in 'start' position thereby bypassing ballast and going directly to coil positive. I forget which one,,,test light or schematic will tell you.
If connection for that wire at the connector is not solid, wiil cause exactly the problem you are experiencing. Same goes for bulkhead connection for this wire.
. Ok I will try to figure out what wire that is and see if there is 12 volts at the ign. Switch. Where will this wire be coming from, the starter relay possibly}?
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Re: Losing voltage somewhere
[Re: mopower440]
#1684549
10/23/14 05:08 PM
10/23/14 05:08 PM
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Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
Sxrxrnr
pro stock
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pro stock
Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
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Quote:
Quote:
Have you separated the connector that ties steering column wiring(from ignition switch) to wiring harness that feeds starter/ignition circuit?
There are 6 main wires, blue, red, brown, yellow etc. One of these 6 is only energized when ignition switch is in 'start' position thereby bypassing ballast and going directly to coil positive. I forget which one,,,test light or schematic will tell you.
If connection for that wire at the connector is not solid, wiil cause exactly the problem you are experiencing. Same goes for bulkhead connection for this wire.
. Ok I will try to figure out what wire that is and see if there is 12 volts at the ign. Switch. Where will this wire be coming from, the starter relay possibly}?
Separate the connector. Take your test light, ground it to known good ground. Then turn ignition switch to start position while probing each wire in connector exiting the steering column.
The one wire that illuminates the test light as you turn switch to run and goes out as you release switch is the wire in question that bypass's ballest.
Test voltage with meter on this wire while switch is in run position,,,should be about 12 volts.
Plug connector back together and test/probe/meter this wire now on the dash harness side of connector. Lost voltage indicates problem at connector joint.
Also you might meter this wire from connector to where it connects to coil. Should be almost no voltage loss.
Good way to test continuity of this wire, ground it at coil. Probe at connector with meter sending a blast of current down it while other meter wire is grounded. Could be a cold flow short in it or problem at firewall.
Good luck. You are making progress whether you yet know it or not.
Last edited by Sxrxrnr; 10/23/14 05:11 PM.
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