Syncmaster

For whatever reason my Flashpro-lowered VTEC crossover point (3600rpm) is no longer being acknowledged. Background info:

• I recently moved from Chicago to Denver.
• VTEC crossover is set at 3600, via a great Tune that Gernby completed for me.
• Gas here is only 91 octane, compared to 93 in IL.
• Altitude is 5000 feet higher here in Denver compared to Chicago.

My car was sitting for a few months (on a tender - battery never died). I decided to take it out this weekend for the first time since moving here, since the weather was great. Being the first time I've driven spirited in some time, I noticed the car seems pretty sluggish. After further investigation, I noticed VTEC is kicking in around the stock engagement point (6000-ish), instead of the 3600 that is set in the tune. I went home, deleted the tune from the Flashpro, re-uploaded it, double checked the settings, then re-flashed my ECU. Went out again and nothing changed. Still crossing over around 6000. Makes no sense.

I logged some runs to send to Gernby since I figured I need a re-tune due to the altitude change anyway, and am waiting for info from him on what we need to tweak. The Super Bowl is somewhat of a blowout so thought I'd write a message here as well, in case the resolution could help someone else. Any thoughts?

s2000Junky

Altitude. He should be able to re calibrate the tune to work for the altitude your at. Unfortunately thats means you may have have to go through the whole data logging process again.

khahoang91

So much for that blowout huh?lol Anyhow, I have the same issue as you, although I didn't move anywhere. My flash pro just randomly decided to engage vtec at 4200rpm now. If I set it to 3600 or 4000 rpm, it still engages at 4200 for some reason, but if I raise it to 6k, it will switch at 6k. So I need an answer for this also. However, in the beginning, my flash pro was engaging at 4000rpm no problem, but no idea why it changed. GO PATS

Syncmaster

Ha no kidding! Can't count 'ol Brady out of a game... ever.

Syncmaster

Thanks guys I'll probably just switch back to the stock tune for the time being until Gernby and I sort out the re-tune. I'll follow up here once that is complete.

WVCR-V

Please let us know the results. I'm thinking about getting a flashpro this summer and it concerns me that altitude could mess up the tune. I live at 600 ft, but often drive as high as 4800ft. Plus I'm planninga trip across country and would hit much higher elevations.

Syncmaster

On initial analysis it appears that (due to the drastic change in altitude), the MAP sensor isn't registering a high enough load to trigger VTEC within the designated range... it only kicks in once the high end of the range is reached, which is stock crossover I believe. Anyway I'm definitely not the expert but will keep you posted. I'm very confident that a touch-up tune will solve the problem. Gernby is the man.