using a PowerFC-

the car was tuned on a dynapack for max gas mileage at low-part throttle, and after such, the car, when i let off the gas and put in neutral or put clutch in (rolling idle), the idle will chill at 1300+ and then lope up, then down, over and over...

The TB is a BBK, which does not have an idle screw, you adj. throttle stop to get it to where you want it. I have it set so when the car is warm, with the below mentioned 'idle stabilty' feature turned OFF, the car will idle at about 1200, which is what feels nice, considering the mounts and engine damper.

the PowerFC has an idle stability feature that pulls timing to keep the idle where you set it on the FC, which is great considering the cam i am running (crower stage 3), however, this feature only kicks in when the vehicle is NOT rolling (when the VSS isn't reading anything)...so...it doesn't help me when im rolling!

TPS is set perfect, IACV is working fine, i tried adding a BUNCH of fuel at the point where it hangs up and it seems to help it somewhat, however, is this the way to go about this? I didn't pull timing as per the suggestion of a friend of mine, but should i do that as well?

 

As per the suggestion of MASE, i set the timing for the idle area to 20 degs (Mase said 16, but that was assuming that my initial timing is set to 16, it isn't, i set the dizzy to 9-10 degs before the damn FC was tuned, and left it there, so the whole map would be shifted if i adv. the dizzy to initial 16)

He also suggested i set the a/f to approx 13:1 in that area, so i did that, and it still was a bit high, but...it was better, so pulled some more timing @ the specific block it hangs at, settling on a setting of 14 degs, and the blocks around that i put to about 17-16 degs.

it seems to be working fine, i let off on a roll and itll drop to approx 1200-1300, however, i will be interested to see how it acts in the morning, dealing with the cold.

Big ups to mase for helping me so far...

 

up!

 

well, started up ok in the cold this morn -5C and did not lope ONCE in about 25 miles of driving....

it still will come down to about 1350 os so while rolling off throttle at times, but i think that this is inherent to the ecu function when seeing VSS signal with not TPS action...

i reduced the timing another 1 or 2 degs around the orig. hang up spot; blocks for 1000rpm and 1500 rpm with mani pressure at -420 ta -460..

im pretty happy with its behavior so i most likely will try to richen it up SLIGHTLY at the main two blocks where it sits when it comes off throttle and see what haps, but..its pretty much FINE.

 

Excuse the exceedingly basic question - but have you tried a simple 10 min/10 min/10 min calibration procedure over again?

I've changed things on my FD and had the PFC be okay - and then change just a small thing and have it need to be recalibrated via the 10 normal/10 a/c/10 defrost times.

 

Did you verify it's behaviour with the clutch in and in neutral after letting off throttle AND clutch out and in neutral?

 

ha- its funny you say this-

the idle procedure really only acclamates the idle stability feature, it doesn't do anything with the non-idle stabilty idle range (ie rolling idle, etc..)

also, w/ the FD boxes, its imperative to run the whole 10/10/10 thing..with honda, believe it or not, you can do all the steps within 3 minutes or less!

a little known fact they should document more...and i was JUST talking about that the other day hehe

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clayne &raquo;</TD></TR><TR><TD CLASS="quote">Did you verify it's behaviour with the clutch in and in neutral after letting off throttle AND clutch out and in neutral?</TD></TR></TABLE>
yeah, it acted virtually the same in both scenarios...


thx for the response ! big ups on using the POWERFC!

 

Okay well let's approach it step by step.

Car still have IAC?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clayne &raquo;</TD></TR><TR><TD CLASS="quote">Okay well let's approach it step by step.

Car still have IAC?</TD></TR></TABLE>

surely! iacv is functioning fine, TPS is on-point, etc. actually, now that ive driven it since my mods to the maps, i think im where i should be...you might have missed my latest report above, but....it seems to be good...so far!

 

Thing is.. if it just happened out of the blue its rather odd.

In almost all cases the surging is either unmetered airflow (doubt it), the PFC being right on the edge, or some other ECU input not functioning correctly.

But if you say it's good now - then

 

BTW:

You *do* have FC datalogit don't you?

 

oh, hmm, no, i didnt happen out of the blue; it happened since the last tuning session which included alot of focus on part throttle gas mileage....

i believe that this portion of the map was mistakenly included in the sweeps where we jacked up timing and leaned her out

Datalogit? nah, FCPRO from Apexi.

Datalogit is not bad, prolly about 95% of the features the new english FCPRO has however, i do believe it does some odd things with the IAT input values and some other things that the FCPRO doesnt seem to do...

 

How the heck did you get ahold of FCPro? It's like 3000$!! Or is this another spin off and not the Apex'I SW itself?



Scratch that, are we talking:

http://kaele.com/~kashima/car/pfcadp/PFCprobe1.gif

?


Modified by clayne at 2:40 PM 1/28/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clayne &raquo;</TD></TR><TR><TD CLASS="quote">How the heck did you get ahold of FCPro? It's like 3000$!! Or is this another spin off and not the Apex'I SW itself?



Scratch that, are we talking:

http://kaele.com/~kashima/car/pfcadp/PFCprobe1.gif

?


Modified by clayne at 2:26 PM 1/28/2005</TD></TR></TABLE>

pm'd