I believe it is up to dateStuka wrote:Are there any firmware updates for it?
How much of a swing? My voltage moves around a lil bit regardless (maybe from 13.7-14.0 reading out on the display).babywag wrote:Just spitballing here, since this has been beat to death...
Have you ever watched/monitored the voltage when this occurs?
EFI is sensitive to voltage swings. An increase or decrease in voltage changes everything.
All sensor outputs, injector output, etc.
*IF* you had/have a momentary or temporary voltage swing, it could cause issues.
For example a low voltage would decrease sensor output readings, and injector output.
Opposite for increase.
I suggest it only because I have seen it, and it is something that hasn’t been mentioned yet.
It absolutely could be an issue like that. I'm not sure where to look though.babywag wrote:It would be a momentary deal, so say it’s normal to see 14.6v...a momentary change.
A guy brought over a Howell equipped system.
(I know not same).
He was having drive ability issue after hot restart. It was running lean, popping through throttle body. Only intermittent couldn’t nail it down.
So I told him bring it by. Logged data and luckily was able to “see” issue.
Right when issue occurred a voltage drop to 11.x, again only momentarily.
Rewired his ignition feed and changed his ground direct to engine vs. battery.
No more issue for him.
I’ve also seen similar on OEM systems.
Loose pins in connectors, broken wires(internal hiding beneath insulation that looked ok), etc.
The wiggle test while running will usually recreate an issue w/ bad connector or damaged wire.
Could also be bad trace/solder joint of ecm.
We’ve kinda beaten this death...
Intermittent problems suck to find!!
I wish you were closer...
Yeah I helped Nightglide with the install of the duraspark dizzy he locked out, so I’ve seen it done. I still have my spare duraspark dizzy from before the HEIaz chip wrote:If going for timing I think the easiest and cheapest way to go is with the MSD, Duraspark distributor and locking out the advance.
Source Three Pin B - DESIGNATED HALL TYPE TACH SIGNAL OR TACH ADAPTERS.
The Tach output pin on HEI Distributors and some other ignition systems tach sources
are very dirty and cannot provide a clean tach signal to the ECU. In these situations a
replacement HEI Module MSD part #83647 or tach adapter with Hall type output signal is
recommended. The Hall type Signal output from either of these sources would connect to
Pin B on the tach input connector. On MSD distributors this is usually a grey wire and is
provided on some ready run distributors also. DO NOT CONNECT TACH PIN ON HEI TO
PIN B, ECU WILL BE DAMAGED.
Interesting...Dr. Marneaus wrote:Sooooo after I had to reach back out to MSD they’re telling me, literally in as few words ‘it’s your HEI’
Apparently HEI’s put out a weak tach signal and that’s MAYBE what’s causing my issue.
So I can run an MSD 6A type box...or something. We’ll see if I act on this. If I’m changing up my ignition and spending money I’m going to get t set up for timing control which I do not think is possible with a standard HEI distributor so that will need replacing as well.
Who now and where?babywag wrote: But, if still available bkilby is selling an MSD distributor for $175
over on ifsja in 4 sale forumDr. Marneaus wrote:Who now and where?babywag wrote: But, if still available bkilby is selling an MSD distributor for $175