Had my TSX re-flashed in August of 05. It is a 6MT. Also installed an Ingen CAI at the same time. Have had the car to the track (Summit Point in WV) on 2 different occasions since the reflash. Here is the problem.

When I had the reflash done, I could tell quite a bit of difference in the performance, now it seems to be the other way around. Car doens't seem to perform as well and is not as fast. Also seems to have some hesitation when accelerating either is a curve or straight away.

Is anyone else having the same issues?

 

Maybe you got used to the power?
It happens to me before.

 

that could be it, you could have adjusted....

 

Gas quality might be different as certain gas companies change the gas formulation during the cold season.

 

I've noticed that I'm used to the power-band flattening of the Hondata reflash. Don't forget, it doesn't raise your peak power, just smoothes and lifts the upper-middle part of the hp & tq curves. I also think one has to add headers and, quite possibly, high-flow cat to get the most out of the reflash.

 

Thanks for the response. Biggest concern is the hesitation when accelating. Even the driving instructor noticed it. Trying to get hold of Hondata to see if they can help.

 

I don't know what that would be -- maybe the reflash, maybe a fuel-system problem or fouled plug? Is it throwing any codes? What RPM/gear is the hesitation happening?

I wonder if disconnecting the negative terminal for 30+ seconds and allowing the ECU memory to reset, so to speak, makes any difference. I have read on the superhonda site that this is something people do from time to time with Hondas. The TSX's ECU is adaptive, I know, but it is a computer after all and -- using my p.c. as a terrible analogy -- sometimes they just like to be turned off and turned back on.

Beyond that, since you're working with Hondata it sounds like you're working with the right people. Just some suggestions off the top of my head.

 

the hesitation happens primarly when I have run the RPM's to around 6-7K and then shift. There is a brief hesitation, like a mis or a loss of power for a mili-second, then it is fine.

this can happen on both a straight away or coming out of a turn. This was not an issue before re-flashing the ecu.

Thanks for the suggestions.

 

Because shifting between 6-7K puts you below VTEC in the next gear? But that would have been the case pre-reflash too...

 

After you shift, what RPMs are you at?

So you have a 6MT?

 

Yes it is a 6MT. When I shift the RPM's drop down to about 4500 or so.

 

You have to stay above 5000 to stay on the vtec cam with the reflash. to get the most out of my reflash, I shift at 7500, rev-limiter has been raised to 7600 with the reflash. My revs then drop to 5200.

In stock form, the vtec engagement is 6000 with the rev-limiter set at 7100.

 

If the shifts drop you to below 5000 then you are going out of v-tech and then back to v-tech once the revs go above 5000. That might be what you are feeling as "hesitation".

 

+ 1

 

Also, get a header. From what i've heard, the reflash is most benefited by one.

 

Ditto that, I just installed a DC header after having the reflash for a couple months and, wow, it really opens up the reflash's effect, esp. over 4,000 rpm and definitely in VTEC. This without any discernible increase in cabin noise (other than it's a lot more fun to wind the motor out!).

 

might be a low i-Vtec fluid issue

 

Yeah, I was thinking either that or the blinker fluid issue

 

Adding blinker fluid is not a fix all solution.

 

=( im still waiting on a K PRO....

 

I would talk to Hondata Stoke. See if you can get a reflash first, and then just pay the difference to upgrade when they come out with K-pro. The reflash is definitely worth it.