newb help 7.3
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New User
Joined: Jun 2012
Posts: 9
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From: mesa az
newb help 7.3
OK I bought a 99 ford f350 7.3 turbo with superchip dually 65k mile on it automatic transmissionm some banks stuff all previously installed. I am new to the deisel world so this is all pretty new to me. When towing my jeep going down hills I turn the overdrive off and the rpms drops to idle and my jeep starts to push me down the hill. I was always taught to downshift to slow the truck down with the engine so not to burn up brakes. This is also the case if I drop it into 2 or 1. The truck drives and shifts normally. Is this normal operation? Any info would be great? Exhaust brakes? Just kinda lost and need some direction or advice thanks
Senior User
Joined: Sep 2007
Posts: 353
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Sounds like something in the chip is unlocking the TC...those Superchips are what they are, you would probably do yourself a justice ( and have a better running truck) to check out
Diesel tuning products for Ford PowerStroke , Jody is always on this site and his chips work fantastic. Welcome! Sounds like u got a nice truck w/ low miles.
Diesel tuning products for Ford PowerStroke , Jody is always on this site and his chips work fantastic. Welcome! Sounds like u got a nice truck w/ low miles.
Senior User
Joined: Sep 2007
Posts: 353
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Superchips are typically just generic tunes...and Yes, they change your trans settings in the chip...The DP Tuner chips change things too but in your case, you could tell Jody not to unlock your TC and so forth to customize it a bit towards your needs.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
Did you get the Superchip programer with the truck. That is the only way to get your PCM back to the stock setting without having to go to the dealer for a flash. You could always send your PCM to Jody (DP-TUNER) to have the stock setting put back.
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Tuned
Joined: Apr 2011
Posts: 406
Likes: 5
From: Fox Island, WA
Gauges to monitor temps are in order too if you don't already have them, especially with a tuned truck.
Also Thunder Monkey. It helps everyone if you build a signature telling what year, model, mods and such are on your truck. There are a lot of guys on here willing to help that know a LOT about these trucks, welcome.
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Thread Starter
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New User
Joined: Jun 2012
Posts: 9
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From: mesa az
ok the chip makes me fail emissions here in AZ. So I disconnect the battery take chip out and reconnect the battery. Take it down test the truck passes with flying colors. reinstall the chip. So wouldnt the truck go back to stock settings once I removed the chip? I do like the chip it has a significant change in power when towing. So if the chip makes the TQ disconnect whats a good way to slow the truck during decents? Yes I have EGT,boost and trans temp gauges
Tuned
Joined: Apr 2011
Posts: 406
Likes: 5
From: Fox Island, WA
ok the chip makes me fail emissions here in AZ. So I disconnect the battery take chip out and reconnect the battery. Take it down test the truck passes with flying colors. reinstall the chip. So wouldnt the truck go back to stock settings once I removed the chip? I do like the chip it has a significant change in power when towing. So if the chip makes the TQ disconnect whats a good way to slow the truck during decents? Yes I have EGT,boost and trans temp gauges
I would highly recommend a set up like mine (DP Tuner). There are other switch on the fly chips guys love on here too. Canned tunes like your SC are generic and do wake your truck up, but are limited and you are stuck with what you have, where a custom tuner you can switch on the fly to other tunes. For instance, I drive around town with my 80HP economy tune and love it. When I tow I switch to 80HP tow tune with different shift points designed specifically for my weight 6k lbs trailer. When I come down a steep grade loaded or not I switch to decel tune and it slows me without using my brakes much.
Below is a picture of my tuner just right of my steering wheel with the #2 on it. I can switch on the fly using this and it plugs into my PCM.
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New User
Joined: Jun 2012
Posts: 9
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From: mesa az
WA_PSD. Makes sense but would a jake brake be a solution or would that just cost me more money then replacing the tuner? OH and cant figure out where to edit my signature. looked in user CP and couldnt find it.
Tuned
Joined: Apr 2011
Posts: 406
Likes: 5
From: Fox Island, WA
PHP is another tuner a lot of guys like too.
User CP under signature. You may need 25 posts first.
Chips - Tuning - 1994.5 - 2003 Powerstroke 7.3L - Ford Powerstroke
Thread Starter
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New User
Joined: Jun 2012
Posts: 9
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From: mesa az
If my TQ releases then a jake brake wouldnt slow the truck at all cause it isnt attached to the drive train. need some real help here to point me in a good directions really dont want to burn up trailer and truck brakes
Cargo Master
Joined: Oct 2007
Posts: 2,712
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From: BoCoMo
ok the chip makes me fail emissions here in AZ. So I disconnect the battery take chip out and reconnect the battery. Take it down test the truck passes with flying colors. reinstall the chip. So wouldnt the truck go back to stock settings once I removed the chip? I do like the chip it has a significant change in power when towing. So if the chip makes the TQ disconnect whats a good way to slow the truck during decents? Yes I have EGT,boost and trans temp gauges
Most SuperChips for these trucks are "Programmable" that you hook up to the OBDII port and program into the computer and this will change the 'Shift Points' and the RPMs at certain places. Do you have a 'physical' 'Chip' that you put in and can physically remove? As for the 'RPMs' going to 'idle' when going down a 'incline', the injects will slowly close and sometime comes to the point of shutting down and the truck will be 'shut off'..... Real freaky when this happens and you realize that the truck is 'off'....
. but it will 'fire' right back up when given a little 'gas' or it gets a 'load' on it. Do you have a Programmer or is the SC a physical chip?