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Does anyone know Mopar ignition?
#724342
06/14/10 04:34 PM
06/14/10 04:34 PM
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Joined: Jun 2010
Posts: 35
SoCal
Groucho5
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OP
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Joined: Jun 2010
Posts: 35
SoCal
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First of all, Hi, I'm new here, and if I need to do an intro as on other boards, lemme know without rippin me a new one.
I have a 70 Challenger over here that misses terribly and won't idle after it's got a little heat in it. I'm pretty confident it's ignition. It'll start and die after initial warmup unless I feather the throttle violently. I tried different coils to no avail. The air gap looks fine in the dizzy, but I did not check as I do not have any brass feeler gauges. It also has a fresh looking orange, US made ign. box. Any thoughts? Thanks
If you don't drive it, don't talk to me
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Re: Does anyone know Mopar ignition?
[Re: JeffC]
#724344
06/14/10 04:47 PM
06/14/10 04:47 PM
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Joined: Feb 2003
Posts: 10,220
Someplace you aren't
SomeCarGuy
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I Live Here
Joined: Feb 2003
Posts: 10,220
Someplace you aren't
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Jeff is right about that.
Would also look for vaccum leak(s) as it may not be able to hot idle with a big leak.
Did it run OK before or is this a new setup?
Maybe it is on the main circuit of the carb and is using vac advance to have enough timing to run???
I want my fair share
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Re: Does anyone know Mopar ignition?
[Re: SomeCarGuy]
#724347
06/14/10 05:26 PM
06/14/10 05:26 PM
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Joined: Jun 2010
Posts: 35
SoCal
Groucho5
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OP
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Joined: Jun 2010
Posts: 35
SoCal
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Quote:
Jeff is right about that.
Would also look for vaccum leak(s) as it may not be able to hot idle with a big leak.
Did it run OK before or is this a new setup?
Maybe it is on the main circuit of the carb and is using vac advance to have enough timing to run???
This is something a friend's been messin with off and on for a long time. He's a busy guy, and has several older cars. So, this one wasn't too important. Anyway, it came to me yesterday with a fuel delivery issue. It would not keep the bowls full on the 3310 Holley. He'd tried 2 mech, and 2 elec pumps. I took the feed line off the remaining elec. pump and blew the sock off the pickup to see if that was the problem. It was. Now it starts and runs, idles for 15 minutes while I tinker with other stuff.....however, after driving it around for about 10 minutes, it misses/surges, and won't idle unless I rev the snot out of it. If I let it cool for a 1/2 hour, same problem, but the float bowls are full, and not contaminated with water, which also crossed my mind. I now see a cracked baseplate in one corner. If I loosed the nut in that corner, I can see the crack close up, but it still won't idle. If I jump it from under the hood, I can cup my hand over the throat of the carb and get somewhat of an idle. It's still more erratic like ignition, rather than fuel. But, I feel my next move is to at least try another carb before I go into the mysteries of electronic ignition. I'm old school and love points. They never leave you stranded. Give you plenty of minor notice before failing. I've had several 10 second cars with points triggering the white(?) wire of a 6A
If you don't drive it, don't talk to me
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Re: Does anyone know Mopar ignition?
[Re: moparmarks]
#724349
06/14/10 06:01 PM
06/14/10 06:01 PM
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Joined: Feb 2003
Posts: 10,220
Someplace you aren't
SomeCarGuy
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I Live Here
Joined: Feb 2003
Posts: 10,220
Someplace you aren't
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If you can get it to run by covering the top of the carb, I bet that crack is the problem. It may be letting in a TON of air. You wouldn't mask an ignition problem by choking the engine. Some carb cleaner shot on the cracked area should tell the tale. Try another carb. 
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Re: Does anyone know Mopar ignition?
[Re: Kern Dog]
#724351
06/14/10 08:01 PM
06/14/10 08:01 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
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I Live Here
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Posts: 15,487
Florida
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I have had one of every color fail on me one time or another over the yrs  i cant count the times i have swaped in a points dist to bypass the crap...on side of the road...in the rain...and dark outside once I swaped it,never any trouble out of it again but i am a rabid parts changer not a mechanic sounds like a vac leak maybe the trouble also 
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Re: Does anyone know Mopar ignition?
[Re: Kern Dog]
#724352
06/14/10 08:08 PM
06/14/10 08:08 PM
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Joined: Nov 2003
Posts: 12,494
Western Colorado High Desert
moparmarks
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I Live Here
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Posts: 12,494
Western Colorado High Desert
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Quote:
Whats with all the hatred for the ORANGE box?
Has everyone had failures with them? I have several spares around here, some original, some off brand and 2 Orange units.
I heard that the Chrome box was good, but are there any drawbacks to using one for 99.5% street use?
My first orange box failure was in 1989. Died in the middle of the busiest street in Denver. Was a new box. Had 3 more fail since. The last was last year. New box lasted about 2 weeks and 30 miles.
72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, . Moparmarks Parts & Restorations Desert Mopar Metal Grand Jct. CO 970-261-7039 http://moparmark.com/motormangj@gmail.com
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Re: Does anyone know Mopar ignition?
[Re: SomeCarGuy]
#724355
06/14/10 08:25 PM
06/14/10 08:25 PM
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Joined: Nov 2003
Posts: 12,494
Western Colorado High Desert
moparmarks
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 12,494
Western Colorado High Desert
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Quote:
M
The real failures I have seen have the back of the box melting the goo out of it. I have seen a few orange boxes do that. Seemed to coincide with Mopar taking the production to Mexico...
I've found that the Mexico boxes are only filled about half way with the resin while the older US boxes are filled almost all the way up.
The older US boxes seem to work fine. The newer [mid 80's and up] are junk.
And yes they need to be grounded good.
72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, . Moparmarks Parts & Restorations Desert Mopar Metal Grand Jct. CO 970-261-7039 http://moparmark.com/motormangj@gmail.com
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Re: Does anyone know Mopar ignition?
[Re: StukaJU87]
#724360
06/15/10 01:14 PM
06/15/10 01:14 PM
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Joined: Apr 2007
Posts: 2,826
NY usa
540challenger
master
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master
Joined: Apr 2007
Posts: 2,826
NY usa
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Quote:
Quote:
Not only do the boxes need to be grounded well; they really need to be away from the firewall. My 72 'cuda has a "standoff" bracket,
I saw a 73 Charger at a local show and the owner had his orange box on a standoff bracket. Is it a custom piece or is it available somewhere?
Any resto. company should have them.
http://www.yearone.com/serverfiles/fbshopmain2.asp?cat=1
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