06 f350 rs issues

My customer has a 2006 F350 Diesel superduty, I put a NuStart {NU-(s) 8000} brand 2 way starter in his truck last week, hooked up tach under the dash where my tech sheets told me to, set the diesel timer blah,blah, blah, so here is the issue,  everything works just fine and dandy when its warmer outside or in the afternoon, but in the morning when my customer goes to start his truck, it will fire and run for about a minute then stop, Ive tried a few things but to no avail, has anyone ever had this type of issue? it starts and runs fine during the day and warmer temps, but in hte morning it only runs for like a minute or two before shutting off?

Thanks Guys.

Matt

Ive tried reprogramming tach to various idles, lower and higher, regardless when the truck is cold the idle shouldnt change enough to effect the R.S.

Ive tried replacing the brain for a newer one, and reprogram the glow plugs for a little shorter, maybe overheating glowplugs on a cold morning?

Why would the tach (or being hot or cold) have anything to do with "run time"?

If the tach is correct, it's correct. The only thing an impropper tach setting would have any effect on, is starting or not,

and grinding. I believe these trucks have built in anti-grind.... so this really should not be an issue

Does your remote start have a built in timer for glow plug, or do you need to have the glow plug wire connected?

with the tech sheets i have it says use tach from under the dash. do you guys have any other locations to get tach and or voltage sense?

and any more ideas why it would not run in the morning but fine in the afternoon?

why in the manual then does it say to hook up the tach wire to alternator for voltage sense? 

   new to compustar, never hd to do VS before.

ahh ok i understand, i thought voltage sense was alternator sense, my bad thanks for clearing that up.

Now back to the issue at hand? ideas?

usabuilt wrote:

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Idle speed change DOES affect run time, if at start idle, is 3 to 4%
different than the resting idle it could cause the unit to shut down, I've seen it happen a million times.

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Can anyone else explain this to me?

It makes no sence at all. Everything that I know (and I am always looking to learn) tells me there is no way that the tach reading could effect the run time? At least with the Astro product...... The tach is used to stop the starter motor from grinding away at the flywheel.

Am I wrong here?

I got a hold of the customers whip today... yes i said whip.. ballin truck.

Anyway what i had him do this morning is go out to his truck and watch the tach when he R/S it. so he said the truck starts and runs at about 750 rpm for 3-45 ish seconds then idles up to about 1200 rpm (my theory: starts and idles to to get oil flow, then revs up to warm the engine with proper oil flow.. possible?)

anyway i reprogrammed the tach at about 1100, RS it when warm, idles at 750 ish doesnt turn off the remote start.. ok good on that stage, then while under remote start i hit the accelerator pedal and took er up to about 1200, still didnt cut off. so im thinking ok good, i found the mid point on the tach range and hopefully now its going to work, the customer will let me know tommorow the verdict and ill let you guys know. but if the junk still doesnt work im going to put a command start in the truck as i have never had a problem with these units and diesels, lets see what happens.

you can go to the crank positioning sensor for tach signal also.  i don't know the wire color but you can call up ford and prolly get it. or if anyone has access to alldata.

We've had to hook to the cps before with compustars.

Im going to try using alternator sense tommorow for the customer, its a nustart nus-8000, so compustart cm-3000 i think, anyway does anyone have the wire color and location for this "stator" wire, i know it says on the back of the alternator, but there must be an easier way to get it.

Thanks for the help 12volt.