DIYPNP first start, low AFR bad idle - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-21-2011, 09:10 AM   #1
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Default DIYPNP first start, low AFR bad idle

Hi all
I need a littel help here. Just installed this in my Miata 90' 1,6, M45 charger, TPS.
Car starts, but can hardly idle. I can see that AFR is very low, but things keeps oscillating up and down.
I tryed to block the walve on M45, to preventing i from going into boost. I also tryed to adjust the idle screw out seveal times, ˝ a turn at the time.
But it didnt help much.
When it comes to changing things in TS, I'm a novise. So I need some advise.

I'm using the startup map from DIYAUTO for my car. But thats for a std. car /turbo. I have relocated the throttelbody, due to the M45. And as we all know there's always some issues whth idle and M45.

Trying to attatch my files.2011-08-21_13.40.52 med blok ventil m AFR.msl

CurrentTune.msq
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Old 08-21-2011, 09:24 AM   #2
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Here is a screendump of logfile.
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File Type: zip Log pic.zip (202.0 KB, 59 views)
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Old 08-21-2011, 09:40 AM   #3
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Go ahead and try the attached map.
Attached Files
File Type: msq CurrentTune2.msq (81.8 KB, 80 views)
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Old 08-21-2011, 03:54 PM   #4
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Thanks a lot.
I will try ASAP. It's my weddingday, so I'm not shure its a good idé to work too much on the car to night.
I will inform of the outcome.
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Old 08-21-2011, 07:57 PM   #5
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Quote:
Originally Posted by Kuksi View Post
It's my weddingday, so I'm not shure its a good idé to work too much on the car to night.
I will inform of the outcome.
I can predict the outcome if you work on the car tonight!
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Old 08-22-2011, 07:28 PM   #6
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Thanks for the help.
I DID manage to spend some time out with the car yesterday. Reverans msq file is loaded, and car is running fine at idle. I did some other changes too. The idle screw is more or less all way in.
The LC-1 is set to output 1/3 sek. and not instant.
(I also remowed the AFPR, sence I wont be needing that anymore)
Then car was almost fine when at idle. Still to the lean side, so I changed the calculated fuel settings until I got the right AFR.
Sence everything looked fine I took the car for a short spinn. Wow, you feel the quick responce at once, when you step on it ( still I kept it under 5500 rpm just in case).
Just have to find out if it is the right way to change "calculated fuel" to get it richer?
I'm going to install a littel bigger injectors anyway (265cc instead of 230cc, from a 00' also for better spray), before I take it to the dyno for tuning. i know I have to recalk the map. But hope to keep my very fine idle.
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Old 08-23-2011, 02:56 AM   #7
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You don't change the required fuel setting to get it richer, you add points to the VE table. The required fuel is set automagically by telling TunerStudio your engine displacement (1598), your injector size, etc. You need to spend more time reading the manual.
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Old 08-24-2011, 05:45 PM   #8
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You're right Reverent, I need to reed more (and undestand it). But I'm reeding all the time I can spend.
I will set back the required fuel, and add points where ecessary. (but still I have to undestand why the ecu, just DO it, when it has the target AFR for every cell)
The 260cc injectors went in last night, and car is running very fine (better than ever).
I loose my signal from the LC-1, when I'm in heavy acc (> 80% TPS). And in De-acc, but that I can undestand). I got no readings/signal form O2 for several sekunds. It goes into "High Impedance", and it is config to do that when in "warm-up" and "error". Is that normal? I have searched the net, but can't find any advise. Other than people is proberly just use the defaults setting for this.
I'm running latest software, and that solved my "error 8" problem. I will try another free air cal tomorrow, anyway. To see if that will help, if no other advice shows up.
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