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      Quadzilla Tunes   06/12/2017

      QUADZILLA TUNE REPOSITORY - There is now a Quadzilla tune download area. When you submit a tune file to the download area it will automatically create a forum topic that allows discussion of your tune. So export your tune and upload it to the site. Then we all can help out in building better tunes. Check it out gang...
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      Hey Gang, I've got the 911 support group database back up and running once again. It's listed in the 911 support category. It will allow members to list their contact information and location so other have a listed of members to call upon in the time of need. So if you wish to support other member please stop by and add your listing into the database. https://mopar1973man.com/cummins/911-support.html/contacts/

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Mopar1973Man

cajflynn - Shutter problem

Started by Mopar1973Man,

8 posts in this topic

Posted

Ok Gang...

I got a phone call from Cajflynn tonight and he's got a shuttering problem with his truck. I'm going to relay this phone call the best I can. So let put our heads together and help him out. He got some internet access on his phone...

SIGNATURE of Cajflynn truck

2001 qdlb, stage 2 f1 injector, 3 disc tc, 4 inch exhaust, arp head studs, ats co-pilot, power puck/smarty, j-hook, lots of gauges, lots of mag-hytec, bhaf, vulcan big line kit, 762K miles

Conditions...

Mild hill climbs at about 63 MPH steady or acceleration the problem (shutter) occurs right at the crest of a hill. Auto Trans temp is <100*F and the rear end about 125*F. Pulling about 800-900*F worth of EGT at 18 PSI of boost. Currently towing about 5K pound trailer.

Now The power puck is traded out with the Quadzilla XPT currently but is shutters the worse with this combo at about 63 MPH. The smarty is in fuel only mode. Trade back to the puck and its not as noticable but still there. But the strange part that the shutter is only notice while towing but empty he's got no shutter. Trans is in good shape...

He's also wondering if the APPS sensor is the cause of this? I got a feeling no... (IMHO)

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Posted

Make sure the wastegate isn't sticking. but that would cause a surge more than shudder, There are just too many things to come up with. No codes I presume?

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Posted

i'm not sure...but you have to work through the obvious. i'm sure it is similiar to the seized brake caliper, you probably don't notice "shutter" when empty. i would tend to think suspension parts but don't forget driveshafts and u joints.

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Posted

Make sure the wastegate isn't sticking. but that would cause a surge more than shudder, There are just too many things to come up with. No codes I presume?

No codes present at this time... That what got me scratchin' my head...

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Posted

What is his RPM at 63 MPH? Too much torque for his torque converter? Did he try it with OD off?

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Posted

I have read that some rigs with a smarty can shuddering in certain conditions. Have him unload the smarty and try it. I was not a fan of smarty in the second gen with any other mods. It was ok on a close to stock or stock rig but I didn't think it stacked well with other mods or electronics from my experience with it, that is why I sold mine.

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