All sensors work right, all vacuums were double checked and PFC is running on Base Map.

Idle learning process was done under the manual, no A/C and running Non Seq Turbos...

http://youtu.be/hy_PpmwH0fU

I got to a point that donīt really know what to look for...

Thanks a lot..!!!

 

I had the same issue two motors ago and still to this day could not figure out what it was. And I had a Power FC as well. I think it is because of a bad injector or something :-(

 

Two motors ago !!! Jjajaja... Only a rotary guy would understand that sentence....

I tested my injectors before the rebuild... How did you fix it ??

 

It's not your injectors, otherwise the car wouldn't be running.

If you have a US-spec PFC, you need to cut the 4 wires on the ECU harness. You also have to adjust the idle air screw. This is all in the PowerFC FAQ in the PowerFC forum, make sure you've gone through that first then come on back.

Dale

 

Have you gone through this thread:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/how-make-your-untuned-pfc-basemap-safer-idle-better-no-datalogit-needed-841706/

 

The PFC is US I think, but my car is JDM.

As far as I read JDM FD do not need to cut the harness.

Am I right ??

 

Increase your idle fuel cut to 1500 temporarily for all 3 settings and see if that fixes it until its tuned. If not, check your TPS voltages and idle screw settings.

JDM FD's do not need wires cut.

thewird

 

TPS is checked, idle screw checked....

I will try fuel cut and ICV...

Tuning here in Chile is not an option, rotary engines is like a unicorn, no specialist at all, so hope to get it fixed with your kind help....

Thanks.

 

This is the engine by the way...


image hosting png

 

A surging idle like that typically comes from the ISC being stuck or the idle air adjust screw needing to be adjusted. Typically for a PowerFC you screw the idle air adjust all the way in then back out a half turn. After that you may need to do the idle learn again - do a full reset on the PowerFC, turn the car off and on, then do the idle learn procedure.

It's also possible you have a vacuum leak after the throttle body.

Dale

 

Thewird and all of you... Thanks for your advice...

http://youtu.be/w4fyvYcovxE

 

Dale I really appreciate you take some of your time to answer newbies like me...

Iīll take some Chilean wine with me next time I got to US, some of you eally deserve it..

Thanks..!!

 

Glad it worked for you. The base map fuel cut settings are very low for stock so if your idle isn't right, it will surge like that as it cycles through fuel and fuel cut. Now figure out why its idling so high as that is too high for stock ports. Also, the base map is not safe for non-sequential and it looks like you have some flow mods done so your going to have to either find someone who will tune your car or buy a datalogit and learn how to do it yourself. We have a PowerFC group if you need help with this.

thewird

 

Wow, it was that easy... The same issue that he had is why I ditched my PowerFC and went to a crappy MoTeC that is *** backwards to tune still leaving me 5 years out with not driving this car

 

Knowing how to use your equipment is half the battle )_)

thewird

 

To add to this, the ISC if operating at either end of its extreames will cause surge. The idle air screw or throttle plate adjustment can cause the ISC to operate too far in the closed position and limit it's capability to control idle. With a Datalogit a new world of visibility and adjustment is revealed including duty cycle of the ISC.