aznexus

Hello Ali,

I have the FFIM installed. I'm not getting any noticeable pinging when I blip the throttle fast, whether I'm on 92 or 94 octane.

Ali SC3

iTrader: (10)

Thanks for the info, maybe its something I changed then or am missing, I will take another look and set the tps voltage like you indicated and see how it goes.

aznexus

I'm not sure if this helps, but maybe you can try a higher octane? For JDM ECU's, they're tuned for 98 RON, if I remember correctly. That equates to about 91 Octane. Maybe you can try a higher octane to see if it makes the pinging go away?

As well, wouldn't the knock sensor(s) be able to pick up the pinging/knocking and adjust for that?

Ali SC3

iTrader: (10)

well we have 91 up here due to the elevation and i put in some from the best shell station we have around here. for some reason I thought the JDM was more aggressive tune than US cars not less aggressive. I was even thinking of using a USDM ecu later on with a map ecu if I can't figure it out and see if it helps but I need the 550 injectors for that and the US ecu. still not sure if it will make a difference usdm vs jdm ecu or if this is a gte vs na-t with a large throttle body issue. also sounds like I may be the only one having it so maybe its just something off on my setup.

I am going to try first with the tps and other adjustments if not I will put a few gallons of e85 in and see how that does. I have a feeling it may do the trick if it does I might just buy some 660cc injectors and try running e85 all the time. wonder how the setup would like that lol I may create more problems or fix them not really sure.

the knock sensor and the o2 sensor do correct it just take a few second and I can hear the pining loud and then decrease and go away as the ecu corrects but man it feels like its an eternity when it happens cause I don't like that noise happening at all if you know what I mean. probably comes on for a whole second loudly and by 3 seconds or so its gone. I still drive it around but it is bothering me when it happens.

aznexus

Yeah I agree. The small things can be so annoying, i.e. squeaky brake pads when they're cold.

I noticed that you're running an adjustable FPR in your videos. I would try to adjust the FPR to see if it was causing the motor to suddenly run lean when you blipped the throttle. If that doesn't solve the pinging, try increasing the octane? Hopefully it's just the FPR that's giving you issues.

Ali SC3

iTrader: (10)

Always have been on the stock fpr actually. Something else must be going on. what kind of throttle body you running?

HiPSI

iTrader: (2)

Well you know how it ran on the stock intake, the only thing that has changed is the FFIM and throttle body correct? Does the timing maybe need to backed down a hair? Could you install a SAFC and richen it up slightly under 3k rpm?

I'm glad I have stuck with the stock intake if this is the case.

Ali SC3

iTrader: (10)

Yeah it was not there or noticeable with the stock intake at all. I tried messing with the timing it didn't seem to change the issue much, but I always see the wide band swinging lean when I blip the throttle its like the more lean I can make it go with the pedal the worse the sound is for a sec. I might just pull the o2 sensor and let it run a little rich. the car actually runs surprisingly well that way and seems to still give full timing just doesn't do any o2 correction.

I was debating swapping throttle bodies but I sort of like my q45 one. I can't believe the throttle response though its like too much change too fast for o2 correction lol. I am going to measure the tps voltage and report back when I get a chance. The SC/LS400 one I have is a little smaller like 75mm vs q45 at 82.5 and the SC/LS400 fits a toyota tps stock I just dont want to make an adapter right now.

aznexus

I'm currently running a 90mm RMR TB with a Toyota TPS adapter. I first started with a Q45 TB, then Accufab. Finally settled on RMR. It's a quality piece with no paper gasket needed. It uses a big rubber o-ring.




The TPS calibration will affect your AFR. I'm guessing when you blip the throttle, the ECU reads the TPS potentiometer voltage first and then reads the O2 sensor second to adjust the AFR accordingly.

Ali SC3

iTrader: (10)

Yeah there must be something off because my last FFIm didn't do it either. I did increase the idle speed recently and mess with the tps when I did that so maybe I need to go back and play with the adapter piece. sometimes its hard to get the adapter at the exact right spot. will let you guys know how it goes.

aznexus

Which FFIM did you use and which one are you using now? I'm using a XS Power FFIM right now.

Ali SC3

iTrader: (10)

The last one was made from scratch using RMR D plenum and a q45 throttle body flange.
This one is the XS power one that I cut off the thrrotle body flange and installed a q45 throttle body flange on.

the new intake is a little shorter than my last one but don't think thats the problem.
I do have the charcoal canister hooked up to a port on the q45 throttle body, so maybe it doesn't like that since I increased the idle, maybe getting too much vac on the tank from that port or something. hopefully I can get it figured out now I am thinking its not the FFIM and something small in the setup.

could even be a rattle going to double check everything is bolted down. the dipstick isn't right now maybe I need to go back and make a bracket. all the details just got to get it worked out again.

187

Just to update changed out the plugs to iridium gapped to about .030. Runs and pulls fine but the codes for miss fires are pending which points me back to the tps.

So I'm going to try moving the tps back closer to stock position and reset the idle screw again next weekend. Here is a short video of after the install, the focus is off but you can see whats going on.

Viedo After New Plugs

Ali SC3

iTrader: (10)

yeah I am pretty sure you have gone too high on the idle, try around the 8-900 range. its tricky to do but possible.
sounds like it revs clean though but the afr's do looks a little lean like maybe its confused.

187

I don't think it will be happy until its back down to that 650-700 as far as the afr's go. But it is interesting that it maintained the high idle while in the "happy" range for the ecu. Really want to get rid of the afr swinging back and forth.