Throttle Surging ?

[Turbo Terry]

Sometimes when I put the transmission in gear(auto) foot on brake the engine begins to surge momentarily. Rpm,s on tach bounce around 50 Rpm,s? After shifting in and out of gear( neutral to drive or reverse ) and it surging every time if I turn the engine off and restart it does not surge anymore. Anybody else having a simalar problem?

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99-24V-2500-Laramie-SLT-A/T-LSD-355
All Options except cab lights and carpet-Rino- Prime-Loc-Alcoa wheels-Lund cold front-Factory Tows-DSG Electronic Fast Idle-Mag-Hytec transmission Pan+Rear Diff. Cover -Tekonsha Voyager- VA CPC -Rancho 9000-5000 steering stabalizer - BD exhaust brake - Auto-loc - Astroflex autostart -Bill K. T/C and V/B in tranmission -Prime-Loc removed and hanging in garage-Alaska

 

[Alan Reagan]

Have you changed the filter lately? The only time mine has surged is when I changed the filter and found a little fuel weeping out of the canister. I thought it was probably getting some air. That will make the engine "lope" a little.

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2001 HO 6 spd 2500, 4. 10 LSD, Towing Package, Electric Brakes, SPA EGT/Boost Gauges, Fog Lights, Real Backup Lights, Molded Running Boards

 

[Vaughn MacKenzie]

T. Terry, is it sorta lopey like a big cam V8? John Treibel has the same problem, he thinks it's a conflict between his DD Tru-Torq box and the BD transmission electronics. It started when he installed the DD box. You may try disconnecting your van Aaken and see if the problem goes away.

Vaughn

 

[Tom W]

Mine started doing that just this week. It only occurs immediately after starting and RPMs seem to bounce when going to reverse or dr. After that everything is normal until the next startup after sitting awhile. I don't have any idea at this point. Hope it just goes away.


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Tom W in Austin Tx 98 24v 2500 Quadcab, auto, 3. 54, lsd, Rhino, white/driftwood, Banks Stinger Plus, Manix grill, nerf bars , DTT's TC, valvebody, cooler, Mag-hytec trans & diff, Pac brake.

 

[Marco]

I think it's the same that happens to me.
It is caused by the DTT VB & TC.
I think it's caused by the higher load that the TC puts on the engine.

DTT told me to increase idle to solve that problem. In fact, higher idle fixes it.
BUT there's also a downside with the raised idle. Ever tried to stop the beast on a slippery road? It becomes very difficult to come to a stop!
Marco

 

[John]

..... possibly Marco however, as soon as I unplug my DD TTPM from the Data Link the lopy idle IS GONE... plug it back in and it lopes at idle. . again. This condition does not exist just after the engine is first started. . it takes several miles for it to manifest itself.

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John Treibel
'98. 5 2500 QC 4x4 Sport, Glasstite Vision II, 285 BFG A/Ts on M/T Challengers, Warn 4X Boards, Mopar fender flares & tow hooks, NW Custom s/s-rubber mud flaps and accs. , Mag-Hytec diff. cover & trans. pan, Edelbrock IAS shocks, Reese Titan V hitch, SPA gauges (3), Dynamat, '00 Sport grille and headlights/PIAA Super White bulbs, PIAA Dual Sport 900 aux. lights, BD exh. brake, Amsoil Dual Remote Bypass, Optima Yellow Tops, DD3s and DD TTPM, Aeroquip AQP braided s/s fuel hoses, Banks High-Ram intake manifold and 14 cm2 turbine housing w/Big Head wastegate actuator, ATS 3-piece exh. man. , Banks 4" dia. s/s exh. sys. , DTT 93% TC, DTT custom tuned VB, BD modified trans. front pump (enhanced by DTT), Air Bulldog induction hood (with NACA ducts), plus MANY other trick modifications

NRA Life (Patron) member

 

[Tom W]

I had my DTT in for five months and it didn't do it. I installed 275s 2 weeks ago and first noticed it a week later, it could be related. I just make sure I have my foot on the brake when I put it in gear, this keeps truck from bouncing. After the first time I get the normal solid shift.

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Tom W in Austin Tx 98 24v 2500 Quadcab, auto, 3. 54, lsd, Rhino, white/driftwood, Banks Stinger Plus, 275 injectors, Manix grill, nerf bars , DTT's TC, valvebody, cooler, Mag-hytec trans & diff, Pac brake.

 

[Turbo Terry]

So I had also related it to the transmission upgrades. I don,t think its a problem? Its not hurting anything just made me concerned.

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99-24V-2500-Laramie-SLT-A/T-LSD-355
All Options except cab lights and carpet-Rino- Prime-Loc-Alcoa wheels-Lund cold front-Factory Tows-DSG Electronic Fast Idle-Mag-Hytec transmission Pan+Rear Diff. Cover -Tekonsha Voyager- VA CPC -Rancho 9000-5000 steering stabalizer - BD exhaust brake - Auto-loc - Astroflex autostart -Bill K. T/C and V/B in tranmission -Prime-Loc removed and hanging in garage-Alaska

 

[John]

Tom W, I have had my DTT 93% TC and VB installed for about six to seven weeks now with EVERYTHING in my signature installed as well (excluding the DD TTPM). That means my DD3s. I have not experienced ANY cruise control problems or surging or a lopy idle with EVERYTHING within my signature... UNTIL I ADDED the DD TTPM. I still don't have any cruise control problems or surging however, I have a slight to moderate lopy idle AFTER I have driven it for approximately five minutes. Keith at DD sent me another unit to test... same results. I'm kind of getting used to it however, Keith suggested there are several possibilities that should be checked out with a scanner. This will take place in the not so distant future.

I'm well aware of having to be very careful about gear selection (from Park or Neutral) into any drive gear (or back into Park) due to the aggressiveness of the 93% TC. This is a harsh combination that relatively few people would like however, after driving several different combinations I chose what I did and would still make the same selection today.

I still don't think the lopy idle has anything to do with my DTT TC and VB... as soon as I remove the Data Link connection of the DD TTPM the idle goes back to normal.

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John Treibel
'98. 5 2500 QC 4x4 Sport, Glasstite Vision II, 285 BFG A/Ts on M/T Challengers, Warn 4X Boards, Mopar fender flares & tow hooks, NW Custom s/s-rubber mud flaps and accs. , Mag-Hytec diff. cover & trans. pan, Edelbrock IAS shocks, Reese Titan V hitch, SPA gauges (3), Dynamat, '00 Sport grille and headlights/PIAA Super White bulbs, PIAA Dual Sport 900 aux. lights, BD exh. brake, Amsoil Dual Remote Bypass, Optima Yellow Tops, DD3s and DD TTPM, Aeroquip AQP braided s/s fuel hoses, Banks High-Ram intake manifold and 14 cm2 turbine housing w/Big Head wastegate actuator, ATS 3-piece exh. man. , Banks 4" dia. s/s exh. sys. , DTT 93% TC, DTT custom tuned VB, BD modified trans. front pump (enhanced by DTT), Air Bulldog induction hood (with NACA ducts), plus MANY other trick modifications

NRA Life (Patron) member

 

[Tom W]

John, I have a very smooth idle, exactly 800RPM. I think the shift into gear, being so firm, momentarily lowers the RPM and then the 275 injectors over compensate. I have noticed a slight difference in cruise control since installing the injectors, some over compensation when the speed drops. This is not a problem, just a slight difference that I noticed. One other mod that I did just recently was the braided steel fuel lines. I don't think that had any thing to do with it. I really enjoy my truck, I guess "I'll just keep modifying until they take it away". #ad

PS: John, whats your opinion of the Banks High Ram intake, does it lower EGTs?------------------
Tom W in Austin Tx 98 24v 2500 Quadcab, auto, 3. 54, lsd, Rhino, white/driftwood, Banks Stinger Plus, 275 injectors, Manix grill, nerf bars , DTT's TC, valvebody, cooler, Mag-hytec trans & diff, Pac brake.

[This message has been edited by Tom W (edited 03-03-2001). ]

 

[John]

Tom, I only had the Banks High-Ram "installed" long enough to see if it would clear all other modifications I have made to my Ram. Since that time, I have been working on it... sanding and burring and sanding some more... and more... and more (heck, I even worked on it early this morning). At this point I have countless hours into this thing. #ad
#ad
#ad
I'm waiting until I have it good enough to have it professionally finished by a ______ ______. I can't answer your EGT question because of this however, I would suspect there would be no EGT reduction... that is unless you strapped dry ice to either side of the High-Ram. #ad
I purchased it more for aesthetic reasons than anything else. Banks claims it reduces pressure loss by 57%. #ad


Vaughn, actually I may have misled you in a previous email... I do not suspect the BD electronics for the lopy idle... I'm removing my TorqLoc so I can install one of DTT's Smart Controllers. #ad


Oh great, after all the harassing I gave MikeR for his lopy idle in his '00 Ram... now I have it meanwhile, he finally found a dealer that would reflash his Ram (albeit, out of state)... and no more lope. Doh!

..... gotta say though, it sounds pretty bad a$$ at stoplights.

 

[Turbo Terry]

This only happens every once and awhile. Not all the time.

 

[John]

Originally posted by John:
I have not experienced ANY cruise control problems or surging or a lopy idle... UNTIL I ADDED the DD TTPM. I have a slight to moderate lopy idle AFTER I have driven it for approximately five minutes. Keith at DD sent me another unit to test... same results. I still don't think the lopy idle has anything to do with my DTT TC and VB... as soon as I remove the Data Link connection of the DD TTPM the idle goes back to normal.

And how wrong I was... well, sort of. The superior effeciency of the DTT 93% TC combined with the DD3 injectors AND TTPM set up a condition that Edge Products hadn't anticipated. Even though I had the TTPM set to #2 (fueling in at 20 psi boost), a small amount of fuel is added just off idle (and above). Apparently the RPM at which the fuel introduction is to be initiated by the TTPM was too low (around 850 RPM according to Brett if memory serves) for the superior effeciency of the 93% TC together with the ECMs idle compensatory characteristics.

After telling Brett about the loping problem and the test procedures tried to that point, together with a detailed synopsis of all possible contributing components on my Ram, he pinpointed the problem within 10-15 seconds! #ad
#ad
He!!, I was floored! Is this guy good or what? #ad


I just received the replacement TTPM with the modified program today... and guess what? NO MORE LOPY IDLE!!!! I believe Brett increased the introduction RPM of the fuel to around 950 RPM. Other than the removal of the lopy idle syndrome, ALL other driveability aspects of the TTPM have remained unchanged. Thanks Brett, my Ram is beyond awesome now. #ad

 

[Hombre]

I dont know about all of you fellas and your mods, but mine is bone stock, and has had the lope just after start-up for a while now. I dont think it hurts anything, so I havent gave it to much thought.

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2000 3500, auto, 355, agate, loaded, Westons, RS9000's, 5 inch exhaust from the resonator back!!

2000 HONDA RUBICON for the mud

 

[JR2]

I wonder if the EZ edge could be causing my stalling problem the same way?? What happens is right when I put the truck in gear, from park to drive, it stalls and kills the engine. This does not happen all the time only every once in a while. I will have to watch to see if my rpm is lopey next time I can. This might be lopey idle to the max. I am going to have to take the EZ off my truck now and see if this solves the problem.

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John D. Rathert Jr.
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01 2500 Forrest Green Sport SLT+ QC LWB 4x4 Auto 3. 54 rear end with all options avail. DC Nerf Bars, DC Grill Guard, DC mud flaps, Line-X bed liner, Leer 160XL Topper, Power Edge, EZ Edge, SPA Boost/EGT Gauge on pillar mount, DTT's tc/vb combo, 275 RV injectors, DD 4" Exhaust and a KN RE0880 where the air box use to be. New turbo (HX40), SS fuel lines and bigger injectors in planning stages... . See My Truck, Dads truck: 98. 5 3500 SLT QC LWB 4x4, Brother Truck: 92 W250 SLT CC LWB 4x4 (Dads old truck) Winter fun - 2000 Skidoo Summit 700
I am my own warranty station. ZOOM ZOOM
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[John]

Originally posted by Hombre:
I dont know about all of you fellas and your mods, but mine is bone stock, and has had the lope just after start-up for a while now.

Hombre, MikeR had the lopy idle problem with his '00 Ram since new. He finally had a dealer in Utah (while on vacation) that reflashed his Ram... bye, bye lopy idle! #ad
I would be willing to bet a reflash would take care of your lopy idle as well.

 

[John]

JR2, the lopy idle condition is not a slight idle fluctuation... it is VERY noticeable... like a Comp Cams 290 bump stick in a hot mouse motor.

Keep us posted as to your findings.

 

[Mopar-muscle]

ok , everyone who has this with bigger than stock injectors please raise there hand ... . its the injectors , mine did it long before i did any mods to my trans , its NOT the DTT stuff , with or without my VA connected , i never paid much attention to it till charlie at Blue chip mentioned it , he told me their 99 also experienced it with the 275's , its something that is related to the injectors , mine doesn't do it all the ime and i noticed not as bad after some of the fuel line mods i have done .

[This message has been edited by Mopar-muscle (edited 03-25-2001). ]