New DIYPNP install, first start minor issues (Wideband, IAC) - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 09-16-2012, 07:13 PM   #1
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Apr 2011
Posts: 119
Total Cats: 1
Default New DIYPNP install, first start minor issues (Wideband, IAC)

I finally finished my turbo/DIYPNP install on my 93. I noticed a few problems that are likely MS related. I started with the DIYPNP startup map.

1) First, the car idles right now around 13.5-14 afr according to my MTX-L. However when I blip the throttle, the wideband pegs at 22.3. It seems to run smoothly and there's no knocking so I'm assuming it's because I currently have no exhaust and the wideband is installed 2 inches from open air. I would think that it would have more trouble with idle since less air is flowing, but that seems to not be the case. Is that the most likely solution?

2) after running for 20-30 seconds I start hearing a buzzing at a constant frequency from around my IAC. I'm using the basic PWM settings from DIYPNP's startup map. I've read threads about IAC's buzzing, but I can't find a solid answer. I think the valve is working, as when I start it cold it idles high and then lowers as the engine warms up, but the buzzing worries me. Any ideas?

Thanks a lot!


[EDIT] nevermind. the wideband was mounted too closely to the air and i changed PWM frequency to 5*30.5hz and the buzzing is gone.

Last edited by event; 09-20-2012 at 10:42 PM.
event is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
wiring wideband ground to battery terminal btabor ECUs and Tuning 10 09-28-2015 06:33 PM
Recommended Tire Temp for best friction thumpetto007 Race Prep 4 09-27-2015 06:16 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:06 PM.