I'm frustrated with tunes at this point, and I've gone back to stock. Below are the details, and if someone can offer some help, or maybe point me in a direction of someone that might be able to help, that would be wonderful.
I have a 2006 GT, Automatic Transmission (Computer VXD1).
When I bought this car, I saw many threads about getting a CAI and a tune, and after talking to a few people I know, and reading a few threads and articles, I decided to go with the MMR CAI, with the replacement tube.
This arrived, and sure enough just as predicted the check engine light came on (with it running to lean).
I was then told that the Diablosport was the tune to go, I found a local dealer, and ordered the Diablosport, and he put the tune in the diablosport and then loaded it into the car for me.
First impressions I was quite satisfied however after a week or 2 of normal driving I noticed that the gas pedal was soggy (for lack of a better word) and took, it didn't seem to be nearly as responsive as the stock computer from Ford, there were other issues as well, like not seen any difference between TCS On and TCS Off.
I emailed the dealer a few times but it was clear I wasn't going to get much help, so I went back to stock and put in the factory CAI back in.
I then got the SCT tune a month or so later, I put the CAI back on and tuned the car and wow what a wild ride the car became, the car seem a lot more than the Diablosport was, but to much so. The tranny shifted very hard, and if I had the TCS Off I would even sqeek the tires going into 2nd (which was entertaining the first few times). Also a new problem showed up where on Cold Stars the RPM's would shoot up to 3,500 RPM's for about 10 to a max of 15 seconds.
Called to get help on that, but was told that as it wasn't going any higher than that it was fine, and others had reported it. So Clearly I wasn't going to get any help on that issue as well.
I went back to stock yet again, where a friend of mine said he knew a guy that worked with Diablosport tuners, so I tried him, and his tune was a bit better than the original Diablosport tune, but once again to many things bothered me about it and there didn't seem to be anything that could be done.
So here I am back to stock, with a lot of money spent on this, wondering if I've wasted my money, or if there is some light at the end of the tunnel for me?
I'm starting to have a lot of respect for Ford, and all the work they put into their computers. Any thoughts? Thank you for your time reading this. I feel a lot better now.
Well I didn't mention the dealers cause at this point I don't want to throw anyone under the bus, but I got the SCT Tune from the same place I got the MMR CAI.
I'm frustrated with tunes at this point, and I've gone back to stock. Below are the details, and if someone can offer some help, or maybe point me in a direction of someone that might be able to help, that would be wonderful.
I have a 2006 GT, Automatic Transmission (Computer VXD1).
When I bought this car, I saw many threads about getting a CAI and a tune, and after talking to a few people I know, and reading a few threads and articles, I decided to go with the MMR CAI, with the replacement tube.
This arrived, and sure enough just as predicted the check engine light came on (with it running to lean).
I was then told that the Diablosport was the tune to go, I found a local dealer, and ordered the Diablosport, and he put the tune in the diablosport and then loaded it into the car for me.
First impressions I was quite satisfied however after a week or 2 of normal driving I noticed that the gas pedal was soggy (for lack of a better word) and took, it didn't seem to be nearly as responsive as the stock computer from Ford, there were other issues as well, like not seen any difference between TCS On and TCS Off.
I emailed the dealer a few times but it was clear I wasn't going to get much help, so I went back to stock and put in the factory CAI back in.
I then got the SCT tune a month or so later, I put the CAI back on and tuned the car and wow what a wild ride the car became, the car seem a lot more than the Diablosport was, but to much so. The tranny shifted very hard, and if I had the TCS Off I would even sqeek the tires going into 2nd (which was entertaining the first few times). Also a new problem showed up where on Cold Stars the RPM's would shoot up to 3,500 RPM's for about 10 to a max of 15 seconds.
Called to get help on that, but was told that as it wasn't going any higher than that it was fine, and others had reported it. So Clearly I wasn't going to get any help on that issue as well.
I went back to stock yet again, where a friend of mine said he knew a guy that worked with Diablosport tuners, so I tried him, and his tune was a bit better than the original Diablosport tune, but once again to many things bothered me about it and there didn't seem to be anything that could be done.
So here I am back to stock, with a lot of money spent on this, wondering if I've wasted my money, or if there is some light at the end of the tunnel for me?
I'm starting to have a lot of respect for Ford, and all the work they put into their computers. Any thoughts? Thank you for your time reading this. I feel a lot better now.
sorry to hear about your disappointment. It sounds like whoever wrote your diablosport program wasn't very good. The SCT tune sounds like exactly what you'd expect. I think the issue is personal taste. Most people like hard shifts that throw them back in their seats... so the tuners commonly ramp up the line pressure. This can easily be lowered if you don't like it. As far as your idle problem, I believe that is a function of the dashpot which is another function that can be changed in the tune. (I am still learning about tuning, so if I could be wrong about the dashpot thing) I don't know if you have any other issues with the SCT tune other than the two you described, but I don't see those as any reason to scrap the mod and go back to stock. But if you are going to continue modding your car, you may have to sacrafice a few things (chirping tires, exhaust mods making passing smog a hassle, lowering the car making it hard on big speed bumps just to name a few)
__________________
2006 Black Mustang GT Coupe
Automatic Trans
8/30/2006
Flows, C&L CAI, SCT tuner from Doug, PI 3000 stall lockup converter, Pypes O/R H-Pipe, Spydershaft, Automber Cobalt Trans temp and oil pressure gauges, Innovate Wideband, SOS A-Pillar replacement, Meziere eH2O pump, FRPP 3.73s, J&M 3 Link, Pioneer Avic-D3, Grillcraft replacement grilles
sorry to hear about your disappointment. It sounds like whoever wrote your diablosport program wasn't very good. The SCT tune sounds like exactly what you'd expect. I think the issue is personal taste. Most people like hard shifts that throw them back in their seats... so the tuners commonly ramp up the line pressure. This can easily be lowered if you don't like it. As far as your idle problem, I believe that is a function of the dashpot which is another function that can be changed in the tune. (I am still learning about tuning, so if I could be wrong about the dashpot thing) I don't know if you have any other issues with the SCT tune other than the two you described, but I don't see those as any reason to scrap the mod and go back to stock. But if you are going to continue modding your car, you may have to sacrafice a few things (chirping tires, exhaust mods making passing smog a hassle, lowering the car making it hard on big speed bumps just to name a few)
There are a number of software adjustments that can be made to tweak the idle but it's not a simple one click fix.
There are a number of software adjustments that can be made to tweak the idle but it's not a simple one click fix.
I'm not saying it is a one click fix. I'm just saying that it is something an experienced tuner can address and that is is no reason to scrap the mod. Based on his story, it seems that his tuner is unwilling to address the problem.
__________________
2006 Black Mustang GT Coupe
Automatic Trans
8/30/2006
Flows, C&L CAI, SCT tuner from Doug, PI 3000 stall lockup converter, Pypes O/R H-Pipe, Spydershaft, Automber Cobalt Trans temp and oil pressure gauges, Innovate Wideband, SOS A-Pillar replacement, Meziere eH2O pump, FRPP 3.73s, J&M 3 Link, Pioneer Avic-D3, Grillcraft replacement grilles
I'm not saying it is a one click fix. I'm just saying that it is something an experienced tuner can address and that is is no reason to scrap the mod. Based on his story, it seems that his tuner is unwilling to address the problem.
Even many of the experienced tuners have not mastered the idle issue. It's very frustrating.
Honestly I could live with the SCT if the idle didn't jump to 3,500... You should see the looks I get form the neighbors... and I just shrug at them like not my doing, it's the ghost in the car..
the thing is from what I gather it says 750 is suppose to be the idle speed, but that might be the once it is warmed up idle, not the cold start one.
I agree the Diablosport tune is a complete waste, and I think if I even try that again I just need to start with a different dealer all together.
Honestly I could live with the SCT if the idle didn't jump to 3,500... You should see the looks I get form the neighbors... and I just shrug at them like not my doing, it's the ghost in the car..
the thing is from what I gather it says 750 is suppose to be the idle speed, but that might be the once it is warmed up idle, not the cold start one.
I agree the Diablosport tune is a complete waste, and I think if I even try that again I just need to start with a different dealer all together.
3500 is awfully high. Mine jumps to about 2000 and then drops back to 750. The cold start high idle is actually by design to rapidly heat the O2 sensors.
One of the problems for us "Do it yourselfers" is making sure we have tightened all the bolts and screws correctly. I kept having a problem with my Diablo Sport tunes or so I thought. Turned out the MAF was not properly seated in the new Steeda 90mm MAF housing. The screws holding the MAF in place were too long, so I added washers to the head side of the screws and no more air leaking past the MAF edges. I am not saying this is your problem, but make sure when installing After Market Parts or FRPP (Ford Racing Performance Parts) that you have them properly installed and the bolts are properly Torqued. Also, the DSP now has many of the After Market CAI's in the latest rev.s (r.35, r.36 & r.37). Also, you should check the bolts & screws tightness or Torque after a few days and/or weeks of driving around. You may find something loose. Do not over tighten/Torque them though. Many of us here have access to the Ford Tech Manuals & Specs (on DVD) for our Mustangs to share.
__________________
"Safety Fast"
2008 Bullitt, #0546, Black
2005 GT Coupe, Performance White
Packaged tunes--regardless of their source--include modifications to many parameters, often more than what you might want. With that being said, my opinion is +1 on the Dyno tune, with the SCT XCal.
One option for you while getting a custom dyno tune is:
1. Reset everything back to stock and get a baseline pull.
2. Then put your CAI on, and tell your tuner that you want adjustments made ONLY to accomodate the additional air flow (A/f mix). He'll increase the fuel mix at idle and WOT, and maybe advance the spark a little.
3. Get another baseline, take it for a test drive, and work from there.
This way, you only adjust what you want and nothing else above and beyond stock. You can also determine for yourself what kind of octane tune you want, by going in with a full tank of whatever octane you want the car tuned to. Your tuner can advance the spark and timing more with higher octane fuel and still ensure the engine is running within tolerance w/o detonation.
Good luck. Don't throw in the towel on tuning and modding until you blow one more engine than you can afford to replace.
There seem to be two types of Mustang owners: those who buy them because "it's a Mustang", and those who buy them as "toys". I think *most* of the folks posting in this forum subsection bought their's as toys.
~Moses
p.s. Don't tell my wife what I said about the whole "toy" thing...
Computer Tune Problems. 
