Well some of you know I have been chasing gremlins with my turbo FB for quite a while. In fact Z and I first noticed it when I was trying to tune in 13 psi. I was having all kinds of hesitation. Then at the last izzy's meet coming home it was hesitating doing 5th gear pulls at like 5 psi. Progressively getting worse and worse. Till now when I go above 5 psi in any gear and about 4000 rpm it just flat lines out. So first I replaced the TPS with a new mazda oem one, didn't help, but the idle doesn't pulse any more. Then I turned the boost control completely of still didn't help. So the other day I thought well maybe the secondary drivers in the ecu were bad. So I swapped ecu sunday morning, and went autocrossing, still flat lining in second gear above 5 psi. Crap. So I came home and pulled the secondary injectors and had then tested at performance prep, tested out like brand new 750 and 760 cc's ****. Put it back together to go to the meet.



Now it wont start, fires of a little bit and sputters, but wont stay running. So I played with it for like an hour could not get it going, Thats why we were a little late last night.

So I get home today and put it on the charger and play with it, pull the plugs etc etc. Finely getting it going, running like totally crap wont rev over 4 grand and shaking pretty bad. So i think maybe the afm and swap in my na one. Get it running doing the exact same thing. But this time I look at the wideband and its like at 20.0 So I shut it done. Pull all the plugs and grab ecu #3 that I removed Sunday morning. Guess what it fire right up and purrs down to a nice idle https://www.nopistons.com/forums/pub...IR#>/bigok.gif If you are keeping track I have purchased enough ecu's over the last year to supply a small army of turbo rotaries.



Anyways let it idle for a while. Go for a ride to the running track, don't ask. Punch it in first goes like a BOH. On the way back home set the boost at roughly 10 psi and punch it in second, pulls really hard to like to 5500 flat lines for like 500 rpm then tears the rest of the way to redline in second.



So the secret is, that I left the na afm in the car, I think possibly the turbo one is going out. Yes I know the na isn't for boosted applications, but I am trouble shooting. So tomorrow I going to rotate between the afms, and see if it changes anything. My thought is that it is. I have been chasing this gremlin for a long time and now I have it back into the corner, I just wanted to share that I have as many car problems as everyone else. perhaps more than some,



Oh yea if you have a N -370 afm I can trouble shoot with let me know.



Thanks

thats just wierd! microtech is calling your name!

The most amazing thing to me is, how incredibly restrictive the S-5 afm is. Looks ok from the outside, but look down the barrel and you begin to realize what a bottle neck it really is. Suprising that you can make any horsepower with them.

Holly Crap this is the car I was supposed to have a year and a half ago. I left the na afm in and went for a hard drive, the flat line was a rich area at 5000 rpm, so I pulled some fuel out. I did a quick fuel tune in for 8-9 psi and its not even the same car. No flat spots or hesitations pull like a freight train to 8000 rpm. This is by far the fastet the car has ever ran. Scary thing is it running less than 10 psi.



Just to make sure I wasn't crazy I put the turbo afm back in and it pretty much ran like crap again, just like the last 6 months... I wanted to share this because few people ever question the afm, and just assume its good to go. I spent way to much time chasing this problem down, frustating to say the least. Rewarding to have it fixed,

I think I going to do a few kills this weekend.

yeah most people dont know the s4 AFM is actually less restrictive than the s5 one. But any setup where you get to remove the afm, will yield a significant horsepower gain.

Shoot now put that ECU I sold you back in and go even faster

so, do you have a stash of turbo ecu's left over suitable to rtek, or are they trash?

correct me if im wrong but I dont belive you can have s5 ecu's r-teked right?

Actually they just can out with a S-5 NA rtek, no turbo version yet.





The ecu's two are stuck in limp mode, caused by a bad omp. #3 is currently in the car and running ok. #4 is the chipped one I bought from Adrian, It work for about a day and half, now it seems to only be powering up one primary injector driver. So I dont know what to think. Other than I have invested over 4 bills in just ecu's and now am I on my third electric omp. Gotta love the S-5's. Oh yea and I am on my 2nd afm and 2nd tps, 2nd clutch, 2nd rearend, also had the turbo rebuilt earlier this year. Just to note the rearend was by choice, a rearend setup to drag race, fails to dodge cones very well. It didn't fail, infact it worked almost too well. Lets continue, 2nd hood, 3rd set of seats, 2nd battery, 2nd water pump, 2nd afr gauage, 2nd gear shift knob, Oh yea 2nd used Apexi S-AFC, 2nd TMIC, 2nd IAT sendor, Want to buy a completey replaced car? Sorry just venting.

boy sounds like your having some problems!! im kinda busy today, but hit me up sometime this weekend and i can come check it out maybe a second set of eyes will help

what sucks about having to spend money to chase stock ECU issues is that by the time you have fixed one thing to have it keep killing another, then you finally find the source of the problem you would have spent enough money to possibly go standalone LOL. I wonder how much work it would actually be to convert to s4 electronics? I believe you would need the map sensor, ecu, throttle body, tps, and afm (also figuring out what wires would need to go where with the different ECU). Reason I mention that is you could probably find all that you need, pick up an rtek chip, and be good to go. Or possibly even go with the PnP megasquirt kits that are for sale on the other forum (I believe there is someone selling one for $450).

Hopefully you can find a good s5 TII afm soon and be done with any future problems. Sounds like you finally figured out how to stop the OMP from killing ECUs.

One more thing... Doesn't RE-Amemiya sell chipped ECUs for the s5 (is that what you got from Adrian)? I bet they would be just as expensive (possibly more) than a standalone though.

www.rx7anonymous.org

the 12 step plan

jk



can the s5 ecus be "rescued" from limp mode?

yeah matt, my bad re: rtec https://www.nopistons.com/forums/pub...R#>/unsure.png

holy shitser... that explains a lot!

Hey DAvid welcome back, I sure you can relate, its always something



Some will be instigating top secret plan B.

plan B???? what are you up to chris...

iono about plan b, but my future plans involve the godzilla turbo https://www.nopistons.com/forums/pub...IR#>/smile.png

Yea thats a big bastard. Wonder what the spool time will be? I run you in some 1/8 miles races. LOL

you find a diesel turbo or something?

Plan B is getting rid of me. Everytime I get in the car it runs like crap.

HAHAHAHAHAHAHAHA.

Actually that was plan "A". LOL.

haha goes with the saying,



when theres trouble around , theres allways a woman involved haha

hahahaha so what is plan "C" ?

Oh, I'm trouble allright https://www.nopistons.com/forums/pub...IR#>/smile.png



z-beater - glad to see you around here again, still not telling.

Yeah I miss you guys... I just have so little time it is hard to get on here. Kind of a hit or miss deal lol...

speaking of pieces of ****, wheres the turbmobile at?? https://www.nopistons.com/forums/pub...1047683785.gif

In the garage not running... Chris was nice enough to come up and help on sunday but we were not able to get it started...

if you are at a point where you want to take it somewhere, i gotta new trailer and truck that need breaking in....lol

I already told Dave I have a little more room at my house.

Damn, you two are making this way too easy for me lol... Allan and I are going to try and get her started here in my neck of the woods... The problem can't be too major... I am just getting burnt out... and I have very little time...

look at it this way... your 99.99999% done. Finish it up.

Ha, ha ha. You'll always be 99.9999% done. We've been there for about 1.5 years now. https://www.nopistons.com/forums/pub...IR#>/smile.gif

Just tow it.... damn it'll start right up if you tow it. go 35 and let the clutch out in 3rd gear. it'll start...

HAHAHAHA I have been there for so long... and I am trying my hardest... just no luck...







^^Bingo... that was the next step... I will be doing that early next week... if not at the end of this week