Thinking about DP Tuner - Page 9

vandiesel · 05-07-2018, 07:44 PM

I just sold my 7.3 that had the latest tuner and a 3 disc billet torque converter. Mine surged pretty hard at lockup. You knew things were happening when it shifted under throttle. I never felt like it was the tuner other than shift points may have been better. Just my 2 cents if it helps.

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REF · 05-07-2018, 10:40 PM

Quote:

Originally Posted by Drizzt

What do you mean by surge at 45-50? Like unexpected acceleration? Abitibi sounds like he has the opposite problem. I already reached out to Jody, but if he responds I'll point him in the direction of this thread.

It’s more of a pulsating power on/off surge when you’re cruising with light throttle input. I notice mine at even lower speeds, I’m wondering if it’s the torque converter myself, or something to do with the remapping of the fuel input at certain rpm, as it almost feels like there’s more fuel being dumped in without getting burned. I think the tunes advance the timing, thus more fuel? Is that right?

'03 Ford E350 7.3L Diesel
SMB RB50 w/CCV top
Quigley 4X4 w/Deavers & Agile RIP kit

1der · 05-08-2018, 07:38 AM

Just like REF describes - It is as if the fuel metering and torque converter lockup are not in synch at that speed. It is more of a shudder rather than surging.

I think there is something in the programming which is not allowing for the smooth engine/drivetrain transition through that speed/rpm zone - too much/too little fuel, too much TC lock up, timing not quite right - I am not a programmer so I do not know. If it were just my rig, I would think injector, or tranny/torque converter problem - except it only happens around that speed one, and I am NOT the only one who is experiencing this with the DP 80 tune. It would be far fetched to think all these 7.3 with DP tuners are having the same engine / torque converter problem. The common item is the DP tuner. In stock tune there is no shudder/surge/whatever, accelerates through that speed very smoothly. It is not right, and I do not know if it will cause damage and therefore I do not use it if speeds are around 45 to 50, when I really want it going up a hill or passing -it blows black smoke and drives my EGT's up quickly, so, I do not use it. On the flats I do not really need it, so I do not engage it.

I guess bottom line is I cannot recommend the DP Tuner for the 7.3 E Series until these things are fixed.

bet on black · 05-09-2018, 12:06 PM

I noticed in my previous van, it would do something similar I was just manually down shift to deal with it. The black smoke is the tune commanding a bunch of fuel to spool the turbo, but not able to get it spinning yet. I ended up switching to a truck turbo from the van one in my new van. the smaller turbine housing seems to work better to spool the turbo in these situations than trying a tune only.

REF · 05-10-2018, 06:57 AM

^^thats interesting
Been playing phone tag with Jody, will post up any solutions he may have to remedy when we have a chance to connect.

'03 Ford E350 7.3L Diesel
SMB RB50 w/CCV top
Quigley 4X4 w/Deavers & Agile RIP kit

REF · 05-10-2018, 07:49 PM

Talked with Jody this morning, I directed him to this thread hoping he’ll post some insight. Stay “tuned”.....[emoji849]

'03 Ford E350 7.3L Diesel
SMB RB50 w/CCV top
Quigley 4X4 w/Deavers & Agile RIP kit

Drizzt · 05-15-2018, 06:43 AM

Quote:

Originally Posted by REF

Talked with Jody this morning, I directed him to this thread hoping he’ll post some insight. Stay “tuned”.....[emoji849]

Somebody's got jokes!

I've been e-mailing back and forth with Jody as well. Told him about this thread but he said he doesn't have a login.

He's been helpful, but he has needed different log files so it is taking time. I can't just up and go for a drive in the middle of work, and he only works three or four days a week. Patience is a virtue, right?

Having to daily drive the big ass van in city traffic made me realize how much that sucks (it doesn't help I got rear ended yesterday in it destroying my new aluminess bumper and box). How do people actually DD these things in the city!?!?!?

Drizzt · 05-15-2018, 06:46 AM

Oh, another little oddity that I wonder if anybody else has had: with the tune installed my cruise control light stops working. The cruise works, just the light doesn't come on. Jody seemed surprised by that. I put the stock tune back in and it works just fine. Anybody else had that problem?

REF · 05-16-2018, 10:30 PM

Haven’t noticed that......anyway, it seems we will not get a response from Jody on this thread, oh well. Unfortunately I had a put together a response after I talked with him, but it timed out and erased, bugger! Here’s a loose list of things....some are already known and practiced.
It seems that it is in fact the torque converter we are feeling with the surging. If he unlocked it, it would fry the transmission.
Ford factory mapping on our older diesel rigs is not linear, thus it’s not possible to pinpoint tunes as well due to this.
He didn’t experience our listed issues when he was tuning these with Chris from ujoint.
He said to make sure you’re in the upper RPM range by manually turning OD off when approaching uphill grades or in the mountains(I practice this with any mountain driving)
At higher elevations, don’t use the daily driver 80hp tune as you’ll see higher EGT’s and black smoke from it dumping more fuel. I mainly use my 60 mountain as my daily driver and only when I’m at sea level and highway driving will I use the 80 daily with good results.
If you send Jody a data log of the rig after its warmed up a bit, he’ll better understand what’s going on and be able to possibly tweak the tune.
He said there are other outside possibilities causing these issues-(unlikely?)injectors, ECM...etc.
hope that bit of info helps.

1der · 05-17-2018, 07:06 AM

Quote:

Originally Posted by Drizzt

Oh, another little oddity that I wonder if anybody else has had: with the tune installed my cruise control light stops working. The cruise works, just the light doesn't come on. Jody seemed surprised by that. I put the stock tune back in and it works just fine. Anybody else had that problem?

Dave, we have an ‘02 and I swore this same thing happened to us. I have no cruise control light illuminating while in cruise. I remember asking Jody about this and the response was ‘tuner should not effect the light’. I then researched and convinced myself that maybe the 2002 van’s never had a light based on something I read that 2001 does not have a cruise light??? .

2003 for sure has a light, we had one for 13yrs! I really do not want to take the freaking module out of our 2002 yet AGAIN (that is another DP story) to find out, but I would like something that works as described.

Also, I am wondering wtf does the ‘stock tune’ setting really do? It certainly is not a complete defeat of the tuner if the Cruise light does not come back on while the tuner is still attached. Right now the only tuner feature I like is the high idle.