Got the pos running after work.
10-10-2006, 10:21 PM
#1
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Join Date: Jan 2006
Posts: 545
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
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
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
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
10-11-2006, 04:37 PM
#3
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Join Date: Jan 2006
Posts: 545
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.
10-11-2006, 08:24 PM
#4
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Join Date: Jan 2006
Posts: 545
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.
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.
10-12-2006, 04:40 PM
#9
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Join Date: Jan 2006
Posts: 545
Originally Posted by hornbm' post='840580' date='Oct 12 2006, 10:29 AM
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 ****, Oh yea 2nd used Apexi S-AFC, 2nd TMIC, 2nd IAT sendor, Want to buy a completey replaced car? Sorry just venting.
10-12-2006, 05:10 PM
#10
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Join Date: Oct 2003
Location: WA, Renton
Posts: 714
Originally Posted by woundup7' post='840612' date='Oct 12 2006, 02:40 PM
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 ****, 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