I can't figure out the off idle stumble. I tried everything I could think of and I can make it worse but not better. Until just for grins I turned up the water temp 80 degree to 135. Now it runs fine but the A\F is a little rich. Does anybody know exactly what this does? I assume it enrichens the mixture but all over or just light load or what?

 

Whats your setup?

Before you even attempt to adjust Thottle tip in settings or any related you need to sort out and make sure you've properly setup your TPS, throttle body, make sure you have no Vac leaks, basically all sensors and components are functioing correctly otherwise you'll just be chasing your own tail around and around and around....

Then and only then, you can move onto adjusting throttle tip in and tweaking your tune...Look up a thread entitled "Success with settings 2 Inj vs Accel TPS1" very informative and will give you a starting point and guidance.

 

Thanks for the reply. I read the thread you mentioned however I don't have a datalogit (yet) so I'm pretty limited on what I can do. Mods are 3" no cats no air pump, cheap bastard intake, LC-1 and of course a PFC. Also the engine is a JDM with a JDM harness (no egr and other smog crap) It ran very well with the JDM ecu with no codes. TPS is adjusted per service manual. I didn't have the LC-1 when running the JDM ecu so I don't know what the A\F ratios were although they were on the rich side. I am probably wasting everybody's time without a datalogit, but the FD keeps me broke. Maybe next payday. Thanks
Dave

 

Honestly, buy the Datalogit and then copy and paste what I labeled as my most recent settings in the above mentioned thread. It is highly likely you will experience a noticeable improvement just from that.

 

Thanks again for the reply. I will get a Datalogit as soon as budget allows.

 

I got the new FC edit 2.129 software here http://www.mediafire.com/?ip4x3tixsjw57d4

I will be trying the new settings for tip in, seems easier to understand now. thanks.

 

I was having the same issue and using the aforementioned tps/v and accel settings was a dramatic improvement. I highly recommend that you take the time to record any changes you make and the results of those changes, trust me it will be beneficial.

 

Same here

 

send me your map I can take a look at it and let you know what I think.

-Frank
Frank@GarageBOSO.com

 

Just loaded up those settings and wow was tip in alot smoother, good stuff

 

these are more recent settings that I posted in another thread https://www.rx7club.com/power-fc-forum-47/accel-settings-inj-vs-accel-tps1-eliminate-stumbles-916169/ need FC Edit 2.128 or later to display correctly

note that if you have a series 4 FC (narrow range TPS only) the settings should be a little bit different, at least in my experience

 

With those settings above, doesn't it inject 7% more fuel at full throttle causing it to run much richer? I noticed my cruising afr get richer when I increased the setting for part throttle.

 

To be completely honest with you, I'm not 100% sure how the INJ vs TPS setting works and when exactly it kicks in. Unfortunately there's no way to directly log how the PFC is using it. Even though it says "INJ vs TPS" It doesn't seem to kick in 100% of the time, based only on TPS voltage.

If using these settings has side effects for you, you'll have to find a work around (by changing other maps) or just not use that table. It comes down to the limitations and quirks of the PFC more than anything else--the reason why I started messing with that table in the first place was because I could not get satisfactory results by only using the "Accelerate Injector" and "Inj vs Accel TPS1" tables.

 

Now the fun begins. I finally got a Datalogit. FC Edit 2.129 on the laptop. The learning curve is long. Very long.

 

^ Do you feel that you need to catch up on background information and theory first, or is it more a matter of understanding the FC-Edit software and the Power FC?

 

FC-Edit software is new to me. I have a long history of modifying piston cars and aircraft. Anyhow, I tried the posted tip-in and it was better but still would stumble so I increased those numbers slightly and it ran great. I noticed throttle cable was loose so I tightened it up and went for a ride. At operating temperature I was at full throttle through 1st 2nd and 3rd gear up "Harry's Hill" and about 8000 rpm in 3rd something went bang. I limped home and did a compression check. The front rotor is fine....the rear is really low. So..... I'm screwed for now. I'm not sure what caused the failure as the A\F was in the 10 range. Not sure what the boost was when it blew but before I dicked with the cable it would do 10-8-10. I'm thinking it overboosted and took out an apex seal. It was real fun to drive without the stumble. Can't wait to get it running right again.....

 

10 AFR at 10 psi boost, if that is true, is way too rich. That would cause much carbon buildup which by itself can cause detonation if it starts burning off under boost. Excess carbon also causes side seals to stick.

I am not the only experienced person who thinks carbon fluff buildup is a major cause of detonation.

Cleaner is better!

 

I also see bigger knock readings when the afr is in the mid 10s. Leaner mix produces less knock, around 11.5 seems pretty good for knock and power, with WI.

 

What am I missing? I downloaded this file, it is has a .rar extension. Is there something else needed to run the file?

 

RAR stands for Roshal ARchive. It is a proprietary[2] archive file format that supports data compression, error recovery, and file spanning. It was developed by a Russian software engineer, Eugene Roshal (the first letter of his surname contributing to the name of the archive format), and is currently licensed by win.rar GmbH.

First time I have seen it.

You do not need to download and use each update unless it actually has a change that affects FD3S or overall useability.

 

.rar is oldschool. All the software pirates used it back in the day, .rar and .arj . They were formats that competed with .zip . WinRAR will decompress a .rar file

 

Thanks for the replies gentlemen, the reason I was interested in this is because on my settings 2 Tab. I do not have the same field designations and data as shown. My version reports as 2.2117 and in the field on tab 2 for Iny vs TPS the columns are labeled TPS % and Settings. I was thinking I needed the latest version of software. If not can you tell me why my setting are different or what I need to do to get to the fields depicted. I would love to try these settings but I do not even have the same units of measure in my DL. Thanks.