jfdid

After the engine rebuild I'm having this problem. Grid heaters turn on with key in our weather right now, this part is fine. Start truck, starts fine. BUT:
When the grid heater cycles on and off, at the moment the solonoid opens and closes, the engine stumbles noticeably. but momentarily.

I disconnected the grid heater and the problem has ceased. BUT, I'm going to need the heater right away and would like to find the issue.

Anyone seen this issue before? Anyone know the nominal resistance for the heater? Is there a way for the heater to short/cause issues?

Alternator issue? Battery Issue or Heater issue?

Thanks.

__________________
2006 Ram 3500 4x4 MegaCab 5.9L, 18" Ultras wrapped in Toyo MT's, PacBrake & PacBrake rear bags, AFE dryflow stage two, Espar D5, Autometer EGT, Oil & Fuel piller mounted, Cat 2 micron fuel filter.

MikeyB

First thing I would do is check the condition of the batteries. And the output of the alternator.

MikeyB

__________________
2003 2500 2wd SWB Quad Cab Laramie, 305/555, NV5600, 3.73LS, Line-X, Westach boost/EGT combo gauge, Fogzilla mod, PML diff cover, Airbox mod w/Amsoil Ea, Hurst 6spd Shift knob, Adjustable boost elbow, Toyo OC AT 285/70/17 E, Daystar 1.5" lift, Monroe Reflex, Raptor RP100, Lazarsmith Intake Horn, Headlight wiring upgrade
SMARTY/Van Aaken C3.2


2005 Dodge Magnum RT (Wife's ride)
2008 Dodge Caliber RT (Daughter's ride)
1990 HD FXSTS

BigDogJeepin

Perhaps the engine was not properly grounded during installation? How much resistance is there between the block and frame and batt neg post?

__________________
2006 Laramie CTD 85K miles.
K&N conical filter in stock box, perforated with holes
4" Donaldson M085171, Kitty MIA
Transgo with usual billet parts
Goerend TC, Haisley flex plate, Billet Input Shaft

Member of "Broken Recirc Door Club"

MTC

During my warm-up cycle(while grid heater is doing its job) my truck has the "stumble" also. It does it maybe 2-3 times during the cycle then its fine.

I had posted on here about the issue in the past and the consensus was that it was normal...others chimed in and said that their trucks did it too.

__________________
'07 3500 5.9 SRW LB QC Auto 3.73 4x4, Isspro EGT, boost, and trans temp gauges, Smarty Jr., custom airbox, straight piped, black stock wheels w/ 285/75/17 Nitto Terra Grapplers

Traded: '04 F350 6.0L SRW LB CREW W/Auto 3.73 4x4
(one issue after another...glad its gone!)

randallp84

I believe it is perfectly normal and nothing to worry about.

__________________
2004.5 4WD Quad Cab, Long Bed, NV5600 6-speed, 3.73s. Smarty, Donaldson 51" muffler, cat delete, Raptor 150.

jfdid

It's not normal. My truck had never done it before this year, obviously something changed.

I replaced both batteries yesterday, should be cold enough tomorrow to test it out. I'll post results. Thanks for the help so far.

randallp84

Maybe your grid heater never really worked before the rebuild. Just a thought.

jfdid

It certainly did, 100%. It wouldn't be starting in -50 if it wasn't!! Hopefully the batteries were the issue, find out tomorrow!

MTC

Let us know how you make out....

jond1

normal!

jfdid

2 new batteries. I could only make it happen once when I started it yesterday. It may be better, it may not. We should get cooler weather and snow tonight, I'll keep an eye out.

Big3500

Normal. Especially the first start of the day.

__________________
2005, 3500, QCSB, 48 RE, 4x4, Black, S&B Intake, Smarty Jr., Isspro Gauges, Muffler Delete, 285/70/17 BFG KM2's

quicksilvr

Mine stumbles, it doesn't bother me b/c I know it's working, but what I really hate is the click heard inside the cab when the solenoid cycles. Do you all hear the clicking too?

__________________
04.5 48RE Regular Cab

woj64

I have the same thing, first start of the day (when its cold seems to be the only time) start, then the stumble usually with the first 30-45 seconds then its fine. It didn't do it right away from new but a month or so latter which prompted a dealer trip. They supposedly could duplicate it, which is rather amusing seeing as it always does it to some extent without fail when its cold and it was cold the day they tried, makes you wonder how much they pay attention to what they're doing. Sorry for the wordiness, glad to know it seems to be normal - or at least I'm not alone.

__________________
07, 2500 QC, LB, 48RE, Inferno Red, Grover Emergency air horn, Nasta w2w step bars, mud flaps
IAFF Local 2704

safecracker909

Would a higher amperage alternator help? Is there an aftermarket alternator available to stop this?

__________________
Neil

2007 Ram 2500HD SLT 4x4, Big Hor, 6.7L, 6 speed auto. MODS - K40 - Banks Inter-cooler - Banks Ram Air - Edge Juice w/ Attitude HOT Unlocked - Smarty ME Stack - EGR & DPF Deletes - AFE 5" TBE 6" tip - Optima Batteries - Airdog II - Mag-Hytech Difs and BD trans pans - Amsoil everywhere - 180,000 miles. Save the Ta-Tas sticker.