Hydra EMS Forums

[mango]

Hi,
I've tried to solve this problem for a long time but still no luck. The problem gets worse during EVERY shift when AC is on. With AC off, only shifting from 2nd to 3rd gear the rev drops faster than others. sometimes the engine stalls when the rev drops way too fast. What should I do with it?

[MR Controls]

Are you saying that your engine drops over 3K RPMs in the 1/2 second that it takes to shift to the next gear? How light a flywheel did you put on that engine?
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[mango]

With AC on, it drops over 2K RPM in 1/2 second, and I am not a quick shifter. With AC off, it does the same only when shifting from 2nd to 3rd gear. My flywheel is stock.

[MR Controls]

There are two things that you can try:

1) Make sure that the max vacuum is set above the point that you idle, but below the amount of vacuum that the engine pulls when it is under decel. For example, if your engine idles at 550mmHg and shows 650mmHg under decel, set the max vacuum to 600mmHg.

2) If 1) doesn't fix the problem, try turning off the decel fuel cut.
_________________
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[mango]

Thanks a lot! Problem is solved!
It turns out that my "fuel cut limit" is set too low (1400rpm).
Now it's set at 1800rpm. But I still have a question.
How do I set "Max ISC Integrator" and " Min AC ISC Integrator" correctly?

[mango]

Never mind.
I figured it out.

The last thing I need to do is to tune the turbo part without a dyno.....