Hondata

Follow up...

Well not to long after I found my P72 ECU was causing me trouble, I got a new P28 from Hondata. Since that point I have had no more hesitation problems. I've been running on the new ECU for over a month now and driving on the highway is no longer a pain. Another thing I noticed is that ...

Okay here is the latest on this long journey. Thankfully it has come to an end. So Hybridsol and myself have been fighting with this on and off for a few months now. So I called Hondata directly and spoke with one of the techs and explained the whole story. He suggested that we try adding timing in ...

Oh btw, how do I check the version of the rom?

Thanks

Thanks, I will give this a try.

Looks like we are not the only ones with this problem. I'm convinced that my A/F is fine but I will try the suggestion in this thred on HT...

http://honda-tech.com/zerothread?id=550794

Wish me luck.

The Lambda conversion table in the Hondalogger is set so 1.00v = .80 so that indicates it is not running rich. Right? If not I guess I need a little more clarification.

Here are some of the logs. You will see that in some of the cases when the TPS increases some the O2 goes lean for a split second. That is when the hesistation is happening.


http://mywebpages.comcast.net/mwilde22/hondata/

The cams are stock (GSR) and the vtec point is set at 5200 (which is beyond the range I see the problem). Cam gears are tuned +2 on the exhaust and -1 on the intake (or was it the other way around, I always get that confused) to remove some of the overlap. That was done at the dyno but this problem ...

Oh yea, one more thing I have also noticed as well that this missfire happens in the area of 10 in mmHG and 5 in mmHG of vaccuum.

Crazy stuff.

I'll keep hacking away.

Thanks

When we were doing the part throttle tuning, I recall the mixture in the problem area being within 1 to 2 percent of stonch (I was doing the driving, not the tuning). I will hook it all up again and pay closer attention in that area to be sure.

Thanks

My setup:

I have a 95 Integra B18C1 (P72 ECU) with a greddy turbo running at 7psi (with intercooler) with 550 injectors. I have Honda stage 2b (datalogging). I have an after market fuel pump (255 lph) along with after market fuel rail, filter and regulator and the stock ignition system.

The ...