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03-26-2018, 09:10 PM
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#1 |
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Junior Member
Join Date: Dec 2017
Posts: 24
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Liked 6 Times in 4 Posts
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MSD ignition
Just put new msd ignition and msd distributor on my car, and at idle the rpm jumps around about 300 rpm. Timing is set at 36 degrees and I have 1 blue spring and 1 light silver spring in distributor with a blue bushing. Any suggestions on getting it to idle without jumping up and down?
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03-27-2018, 04:46 AM
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#2 |
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VIP Member
Join Date: Jun 2009
Location: Boulder City, Nevada 89005
Posts: 2,708
Likes: 2,734
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Re: MSD ignition
We run both light silver springs if we do not lock out the distributor.
Simple job to rotate distributor on shaft to lock it. If that fixes it it is probably advance springs......Drag cars often work fine with it locked even without starting retard.
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John Irving 741 Stock 741 Super Stock |
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03-27-2018, 08:17 AM
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#3 |
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Member
Join Date: Aug 2010
Location: CT
Posts: 451
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Re: MSD ignition
I'd suggest that you verify with a timing light that a timing variation is the cause of your idle changing - if it is, just change to a bit stiffer spring.
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Phil Molski PMR Performance S/C 1623 |
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03-31-2018, 08:35 PM
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#4 |
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Senior Member
Join Date: Mar 2002
Location: TN
Posts: 530
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Re: MSD ignition
Like John said lock it out and forget about it.
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Rod Greene Real men shift for them selves. Slowly working on TA Challenger for D,E/S and a 72 Challenger for SS/K, L as if I don't have enough other projects. |
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03-31-2018, 10:21 PM
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#5 |
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Member
Join Date: Nov 2002
Location: mphs tn
Posts: 218
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Re: MSD ignition
I've seen a bad plug wire make the timing jump around on a locked out distributor u mite check them
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