Possible msd ignition issues?
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crittersf1
rmcomprandy
f250mike
7 posters
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Possible msd ignition issues?
Awhile back I put a digital 6 box in my truck.
Everything was fine until last month when the 2 step stopped working correctly while on the trans brake. It quit chattering for lack of a better word. My rpm's would still stop where it was set at though.
The last 2 races my 1/4 mile ET and mph have been off by 2-3 tenths and 4mph. I just figured it to be the hot humid weather.
This past Saturday while in the staging lane for qualifying my tach jumped from idle rpm to 4000rpm a few times and the shift light flashed several times.
When the qualifying pass was over I checked the max rpm on the tach and it went to 7000rpm (6500 is normal). I erased it and started the engine again, this time it was only idled. The recall went past 9000 rpm.
I did try a different coil for 2nd round qualifying. the recall rpm seemed right but the performance was still off.
Do you guys think the digital 6 box is my problem or is it something else??
Mike
Everything was fine until last month when the 2 step stopped working correctly while on the trans brake. It quit chattering for lack of a better word. My rpm's would still stop where it was set at though.
The last 2 races my 1/4 mile ET and mph have been off by 2-3 tenths and 4mph. I just figured it to be the hot humid weather.
This past Saturday while in the staging lane for qualifying my tach jumped from idle rpm to 4000rpm a few times and the shift light flashed several times.
When the qualifying pass was over I checked the max rpm on the tach and it went to 7000rpm (6500 is normal). I erased it and started the engine again, this time it was only idled. The recall went past 9000 rpm.
I did try a different coil for 2nd round qualifying. the recall rpm seemed right but the performance was still off.
Do you guys think the digital 6 box is my problem or is it something else??
Mike
f250mike- Posts : 628
Join date : 2009-03-28
Age : 60
Location : Rensselaer, Indiana
Re: Possible msd ignition issues?
I know that a separate RPM activated switch going bad, like that of an air shifter, will affect how the ignition box works.
Anything else, I don't know.
Anything else, I don't know.
Re: Possible msd ignition issues?
Sounds like the box is ready to take a big ol' stinky dump
crittersf1- Posts : 521
Join date : 2009-10-28
Re: Possible msd ignition issues?
could be a tach going bad also!
lghting94- Posts : 762
Join date : 2008-12-16
Location : Vine Grove Kentucky
Re: Possible msd ignition issues?
The tach shouldn't influence his ET's and MPH
crittersf1- Posts : 521
Join date : 2009-10-28
Re: Possible msd ignition issues?
Sunday I swapped out the digital 6 for my old 6al and 2 step.
I won't be able to try it out til Saturday at the races.
The tach seems to be working ok now.
I won't be able to try it out til Saturday at the races.
The tach seems to be working ok now.
f250mike- Posts : 628
Join date : 2009-03-28
Age : 60
Location : Rensselaer, Indiana
Re: Possible msd ignition issues?
The only reason i mentioned the tach is I have had one on my truck and another on a buddys truck short out or something inside and would cause the box to act funny motor would not rev right and seemed loaded up all the time.
lghting94- Posts : 762
Join date : 2008-12-16
Location : Vine Grove Kentucky
Re: Possible msd ignition issues?
how old are your plug wires ? When they have over a certain amount of ohms per foot of wire they can cause problems and I think the 2 step not working is the first sign they are going bad.
KY JELLY- Posts : 1530
Join date : 2008-12-03
Re: Possible msd ignition issues?
Randy, I haven't checked the ohms on the wires since late last year.
I had thought about getting new ones but they checked out good
Thanks, I'll have to check them again.
Mike
I had thought about getting new ones but they checked out good
Thanks, I'll have to check them again.
Mike
f250mike- Posts : 628
Join date : 2009-03-28
Age : 60
Location : Rensselaer, Indiana
Re: Possible msd ignition issues?
msd has a tech support forum might try there too.
http://www.msdignition.com/forum/
http://www.msdignition.com/forum/
KY JELLY- Posts : 1530
Join date : 2008-12-03
Re: Possible msd ignition issues?
Thanks again Randy!!
I tried calling the msd tech line today and must have put the wrong # in my cell phone.
I called some real estate office somewhere .
mike
I tried calling the msd tech line today and must have put the wrong # in my cell phone.
I called some real estate office somewhere .
mike
f250mike- Posts : 628
Join date : 2009-03-28
Age : 60
Location : Rensselaer, Indiana
Re: Possible msd ignition issues?
Well I guess the ignition box was where I had my issues.
I raced today and the truck ran more consistant than it has all year .
Today was the finish of a rainout from last Saturday.
My first pass was a test pass and it went 12.04 at 109mph.
I went 3 rounds and ended up with the win. All 3 were 12.07 at 109mph.
New spark plug wires are going on before my next race just in case today was a fluke.
Thanks for the help guys
mike
I raced today and the truck ran more consistant than it has all year .
Today was the finish of a rainout from last Saturday.
My first pass was a test pass and it went 12.04 at 109mph.
I went 3 rounds and ended up with the win. All 3 were 12.07 at 109mph.
New spark plug wires are going on before my next race just in case today was a fluke.
Thanks for the help guys
mike
f250mike- Posts : 628
Join date : 2009-03-28
Age : 60
Location : Rensselaer, Indiana
Re: Possible msd ignition issues?
Way to Mike the points leader
69F100- BBF CONTRIBUTOR
- Posts : 5386
Join date : 2009-01-04
Age : 57
Location : Irwinville Ga.
Re: Possible msd ignition issues?
great job mike
BOSS 429- Posts : 2372
Join date : 2009-08-10
Location : Ill
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