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Re: msd ignition woes
[Re: mickm]
#1511298
06/20/14 04:46 AM
06/20/14 04:46 AM
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Joined: Jan 2007
Posts: 10,308
A Red State
SNK-EYZ
I Live Here
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I Live Here
Joined: Jan 2007
Posts: 10,308
A Red State
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Mick, Have you run it on a dyno? I just saw this thread and was wondering if I'm having the same issues. I've got a 6AL2 digital on my car and it's definitely having issues. Rev limiter set at 6500 and it wacks out about 5400. The power curve drops off but it "tries" to recover. I'll have to set the rev limiter higher and see how it does. 
Kayse can't keep up at all now. lol
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Re: msd ignition woes
[Re: SNK-EYZ]
#1511299
06/20/14 10:01 AM
06/20/14 10:01 AM
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Joined: Jan 2003
Posts: 13,496
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,496
Marion, South Carolina [><]
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Have you tried disconnecting your tach? I have seen a tach cause all sorts of problems w/ misfiring even though it seemed to be working ok.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 4 speed, Dana 60
'71 Demon 340, no drivetrain, on blocks behind the barn
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: msd ignition woes
[Re: mickm]
#1511300
06/20/14 01:13 PM
06/20/14 01:13 PM
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Joined: Mar 2007
Posts: 3,298
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,298
West Coast, USA
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Mick, You have the most amazing series of mysterious problems. I thought I was the only one who goes through this BS.
Best of luck. That car is awesome!
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: msd ignition woes
[Re: an8sec70cuda]
#1511301
06/20/14 01:46 PM
06/20/14 01:46 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Have you tried disconnecting your tach? I have seen a tach cause all sorts of problems w/ misfiring even though it seemed to be working ok.
I seen that problem on my brothers chevy... when I
finally took off the tack lead it straightened right out
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Re: msd ignition woes
[Re: an8sec70cuda]
#1511302
06/20/14 04:24 PM
06/20/14 04:24 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
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OP
master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
Have you tried disconnecting your tach? I have seen a tach cause all sorts of problems w/ misfiring even though it seemed to be working ok.
yes, have tried this. didn't make any difference. even put a disconnect down near the box so that the wire if disconnected at the tach, (even though it wasn't conducting), still wasn't acting as some sort of antenna.
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Re: msd ignition woes
[Re: SNK-EYZ]
#1511303
06/20/14 04:29 PM
06/20/14 04:29 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
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OP
master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
Mick,
Have you run it on a dyno?
I just saw this thread and was wondering if I'm having the same issues.
I've got a 6AL2 digital on my car and it's definitely having issues.
Rev limiter set at 6500 and it wacks out about 5400.
The power curve drops off but it "tries" to recover.
I'll have to set the rev limiter higher and see how it does.
the engine was broken in on a dyno, and ran great.
for everything i have tried, (and if you look at the beginning post you will see the list), only 3 things have made a difference:
- resistor plugs
- resistance plug wires
- moving the box out of the engine compartment.
in the end i know it is still something funky with my setup. yes, the digital boxes have problems, but many, many people run them in or around the engine compartment without problems… or at least problems that they notice.
but i'm done messing with it. i am going to try one more thing though. i want to put the dual point distributor back in and eliminate the box altogether once more and compare how it feels. the time i did that i only took it for a few short runs and it felt fantastic. but now i want to check it again, as with the box in the passenger compartment i want to compare the two.
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Re: msd ignition woes
[Re: jbc426]
#1511304
06/20/14 04:32 PM
06/20/14 04:32 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
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OP
master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
Mick, You have the most amazing series of mysterious problems. I thought I was the only one who goes through this BS.
Best of luck. That car is awesome!
john, don't i know it! to be honest, i'm starting to lose interest. seems like the time i spend trying to diagnose and fix problems is starting to tip the fun scale in the other direction.
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Re: msd ignition woes
[Re: mickm]
#1511306
06/20/14 04:39 PM
06/20/14 04:39 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
Mick, You have the most amazing series of mysterious problems. I thought I was the only one who goes through this BS.
Best of luck. That car is awesome!
john, don't i know it! to be honest, i'm starting to lose interest. seems like the time i spend trying to diagnose and fix problems is starting to tip the fun scale in the other direction.
Been where you are now.
Unless it's a race car, I have found much more fun with my cars using stock parts. I have already gone really fast in my diggers, so for me it's now all about reliability with my muscle cars. Some stock parts perform just fine on the streets and don't keep your car from performing great, like fuel pumps and ignition. 
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Re: msd ignition woes
[Re: Challenger 1]
#1511307
06/20/14 07:14 PM
06/20/14 07:14 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
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OP
master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
Been where you are now.
Unless it's a race car, I have found much more fun with my cars using stock parts. I have already gone really fast in my diggers, so for me it's now all about reliability with my muscle cars. Some stock parts perform just fine on the streets and don't keep your car from performing great, like fuel pumps and ignition.
not having had the experience of really racing, the fun comes from having a car that is fast that can be used on the track as well as the street. nice situation to be able to get the go-fast out of your system on the track to that extent.
i'm starting to move more to your point of view, i must admit...
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