Ok, I have an AEM intake, Buschur Muffler Delete Pipe and have been Dynoflashed with those mods. I got this done approx 3 weeks ago with absolutley NO problems. I am producing 265whp after reflash.

Took my car to the track today (2nd time ever in my life). It was about 45 Degrees out and pretty cold. First run I got 13.7 at 103mph with a 2.2 60'

My 2nd run, I launched...the car then started "bucking" in 1st gear under WOT...then I shifted to 2nd and same thing..It was like hiccuping.

So now, my car runs great under normal throttle but when I go WOT in any gear, my car takes of rapidly then its like I hit the brakes or something..it jerks or hiccups until I back down. I can boost under half throttle until redline with no problems.

By the way, at time of tune I was running 265whp with 2lbs less boost due to the Delete Pipe. I was tuned with a very connservative A/F 10.9 Is fuel cut definitely the problem or could there be something else?!?

EDIT: Why is this happening now because I got on the car pretty good after the reflash (TONS of WOT pulls in all gears) and never had any problems

 

This is where a flash becomes a pain in the ***, you can't just remove it to trouble shoot the problem. I would lower the boost and see if that helps.

 

I don't have a Boost Controller. I will be maild my ECU to Al, but I wanted to see if anyone had opinions on what was happening

 

i hit fuel cut all the time, its very annoying i even trimmed down my boost a half turn, which dropped it a LB. and i hit it last night, but its been getting high 20's and low to mid 30's here...

 

Its cold as a futhermucker, that's the problem. I've hit boost cut as low as 20psi. Car won't go above 21psi, even with racegas. We need fuel cut defensers. On the other hand, what does your boost gauge read? That's extremely off if you're running 18psi or less.

BTW: My BR muffler delete pipe didn't take away any boost.

 

We have a solution already worked out for this guy's bad dilema !!!!

We were using a very MILD boost cut increase on our stock or stock boost reflash customers - leaving in most of the boost cut for obvious safety reasons. It would have been nice to reatain some kind of over boost protection in the event of a hose popping off etc.

Our calculations indicated that there was more than enough "head room" on STOCK BOOST cars to never reach our raised boost cut.

It seems like we have not raised the boost cut high enough as our Dyno Flashes are actually making more HP that we originally calculated they would and it also seems.

This particular guy's car was fairly strong on the dyno at about 70 degrees temp and what we THINK has happend is that his HP output jumped up by a substaintial margin due to the very cold air today ! We feel this is mostly due to increased intercooler function and also the denser air.

Obviously we are going to have to RAISE the over boost cut to the higher limit we use on cars with boost controllers ON ALL Evos we flash in the future.

We have a lot of room left in the fuel cut to raise it up higher so all this guy should need is a fuel cut limiter level increase. (We are assuming based upon reports from the customer he is hitting fuel cut - - it is possible that his cars problem may be realted to some mechanical issue that was caused during his first pass down the 1/4 mile track. Without having the car before us it is hard to pin point the exact cause. What troubles us is that he was able to make a FULL pass at 103 mph then the problem started and only 20 mins later he can't even run in 1st gear - very strange indeed).

In the unlikely event that any of out stock boost dyno flash customers should hit the fuel cut in the comming weeks as winter temps approach just shoot us a phone call or email and we will arange to get your ecu in and add raise your fuel cut to the higher level - FREE of any charge

 

We offer a $79.99 reflash that almost totally eliminates the high boost fuel cut but does NOT alter any of your other ecu functions. A FCD on and evo is a bad idea as the fuel cut is MAF based and you don't want to clamp that signal becuase if you make air flow above that clamp point then you go lean ! Bad

We also have a new code that was just developed by Tech Tom which is supposed to totally remove the fuel cut but I have yet to try that one out. After we test it we may also offer that option but right now we offer a very high fuel cut point that NO ONE on a stock turbo would ever reach.

 

Al, is this flash a safe one? I'm getting my car back soon and with the increasingly cold air, I don't want to be hitting fuel cut all the time at WOT. I've yet to hit it, ever, but if I do i'm going to probably send it your way.

 

As a followup, I am a pretty fair guy and I don't want it to sound like I am putting Al or his product down. I love my reflash and like the work that was done on my car by him . I know others on here love to talk **** about him, but not me. We are working together to solve this problem(IF it is even related to the reflash). I will definitely post my results when it is solved

 

The $79.99 reflash ONLY raises the fuel cut - its raised enough so I was able to run 535 whp on my car at 1.8 bars of boost - pretty high eh; raises your rev limit to 7800; AND if you have stock boost it removes the boost taper

The other flashes also have this feature - BUT - we were only slightly rasing the fuel cut on guys with stock boost as we calculated we could leave in most of the fuel cut and still never hit it on stock boost - obviously we are now going to raise ALL the reflash clients to the higher boost cut level irrespective of how much power they make

 

BTW - you forgot to menton the good news - you told me you gained 5 mph in the 1/4 with the reflash over your last trip to the track - thats a decent gain!

 

You are correct sir Last time I was at the track (My first time ever) I ran a 14.0 at 98mph. My trap now is 103 with 1 run and a 2.2 60'. I only wish my car had a better driver My friend was pulling 13.2s at 100.5 with a 1.8 60'...I'm sure I could have gotten better

 

why not upgrade your fule pump and get a fuel rail etc etc ?

 

Not necessary at 265 whp. Also his a/f was totally under control and at under 90 % duty cycle

As you start to get over 280 whp with full 3" exhaust and a boost controller its a good idea to add a fuel pump

We dont have to raise fuel pressure and then lower the maf signal to avoid fuel cut - we simply re-write the code and rasie it very high

We simply did not raise this guy high enough - apparently - as his fuel cut is only 20 % higher than stock and it seems he is hitting it

 

Does the DynoFlash ship with a pre-paid return mailer?