Thanks! Looks like I have a good reason to finally get my boost pill installed to try out their patched flash.

Too bad it's currently -3F out!

 

Hey Bryan, I downloaded your GST basemap for 93 octane gas with upgraded boost pill on November 5th, which was actually the very first day that you posted it, and I've been having a similar problem, but not exactly the same as what happened to this guy. For me the problem is that sometimes when I give it full throttle(either in manual or sport mode), the car will "buck" extremely hard at some point right around the transition from 3rd to 4th gear. I haven't gotten a CEL yet or gone into limp mode, but it's definitely a very unsettling feeling when the car jerks that hard. Is there an update to that original basemap or possibly a cold weather basemap that I should download which will fix the problem? I live outside of Baltimore, Maryland.

 

Quick question for anyone who installed their own boost pill from GST (Had a friend install mine). What direction does the boost pill go in? I don't feel like having to rip mine apart to be able to find out but I have someone else who is going to use this GST flash with boost pill and we aren't sure which direction to place it. I made a (horrible but to the best of my abilities) picture of what I am talking about, since it is rounded around one of the edges and not the other.

 

Doesn't matter, the beveled edge is just for ease of insertion.

- Bryan

 

For Bryan at GST, I think I've figured out for sure what's causing the hard bucking at full throttle in the 3rd/4th gear range(I'm running the GST basemap for 93 octane with upgraded Boost Pill). Today I flashed back to the stock/factory basemap and duplicated the conditions that I had the problem with over the weekend. The temperature was in the 20's again today and I gave it full throttle in sport mode on the same stretch of road that I had the bucking problem over the weekend, and even though I tried numerous times I could not get the car to jerk hard on me while running the factory tune like it did with the GST basemap. Also, while I was doing this test I had my ScanGauge II hooked up to record AFR, and I noticed a huge difference in the AFR at wide open throttle between the factory tune and the GST tune. With the GST tune the AFR pretty much was always locked on at 14.6 no matter if I was crusing with light throttle, or whether I was giving it full throttle and accelerating hard. On the other hand, with the factory tune, it stayed at 14.6 during light throttle, but dropped all the way down to the 11-13 range during full throttle and hard acceleration. Anyway, I hope this is helpful feedback for you, since I know several people have experienced similar problems with bucking and Check Engine Lights. So, if you're feeling inclined to produce a few cold weather basemaps, I'm sure lots of people in the colder parts of the country including myself would benefit greatly from using them during the winter months!

 

Is the jerk like hard hitting a brick wall? Wanting to throw you through the windshield? If it is, that is fuel cut, which probably came from a overboost in the cold weather, so actually the safety net is doing it's job.

As far as AFR from ScanGauge II, you need a wideband AFR sensor to log actual AFR. The ScanGauge goes off the factory narrowband which is not accurate for showing actual AFR at all.

Let me know how violent the jerking was. Did you run the factory map with the GST upgraded boost pill?

Also are you using the "beta" flash I posted in post #7 here?

- Bryan

 

Bryan, thanks for the quick reply. I'd say that "hitting a brick wall" is definitely overstating the case, but the best way I can describe the "jerk" is that it felt like someone slammed on the brakes for a split second while I was giving it full throttle. In answer to your second question, I DID NOT run the factory map with the upgraded boost pill, but rather I switched out the boost harness and boost pill back to the factory/OEM equipment at the same time that I reflashed back to the factory/stock map. In reference to your last question, I DID NOT try the "beta" flash that you posted in #7 here because it said it was for 91 octane gas, and we run 93 octane here in the Baltimore area, so the only GST basemap that I've ever run is your 93 octane with upgraded boost pill map. Feel free to write back with any other question, I'm just trying to help out here!

 

If it feels like slamming on the brakes it's probably fuel cut.

Let me post a updated 93 map and see if you can replicate the problem in the cold. Might not be until later tonight or tomorrow as I am currently in Lake Tahoe.

I do indeed appreciate the feedback.

- Bryan

 

Slee256, try out this ROM and let me know if you can recreate the issue:

93 oct - Boost pill - beta

 

I'll definitely do that, and thanks a million! Have fun in Tahoe!

 

What is updated on the new 93 boost pill map?
I haven't had any boost cut issues with the original one.
When I first ran the car it did give an overboost code the first time, but the car learned target boost and it never repeated that.

I want to get a wideband so bad so I can log you some runs. I think it runs a lot richer with an exhaust.
Hence, all the black crap on my rear bumper!!! haha!

 

I think Bryan at GST modified the basemap for running in cold weather, because me and several other people in the "colder" states were having problems with the car bucking, overboosting, and throwing other error codes when accelerating hard or at full throttle in cold weather.

 

That new ROM fix things?

- Bryan

 

I just went in to the Mitsu dealership tonight to get the airbag sensor recall done on my Ralliart while it was still in stock configuration just to make sure that there's no way they'd find out about me running your tune on my car. So, I haven't had a chance to switch back over to the GST upgraded boost pill and download your new tune yet, but my goal is to have it done by the end of the weekend! I definitely miss having your tune on there, because some guy in a stinkin SUV beat me in a road race on the highway on the way home! The car just doesn't have the same kind of pickup like it did with your basemap!

 

I hope you aren't racing on icy roads