EMU Guys - Studder At Boost - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


E-Manage Post your questions about greddy e-manage installation and tuning here.

Reply
 
 
 
LinkBack Thread Tools
Old 08-24-2008, 08:57 PM   #1
Junior Member
Thread Starter
 
Join Date: Oct 2005
Location: New Hampshire
Posts: 248
Total Cats: 0
Default EMU Guys - Studder At Boost

Hey Guys, I know this doesn't exactly belong here but you guys are as close as is available in this forum.

I'm trying to get my F/IC tuned and I'm having trouble with the car shuddering when it enters boost. I have the 02 clamped at .38v starting at 1PSI. The injectors are stock.

The F/IC reads in PSIA so
14.7 PSIA = 0 PSI
15.7 PSIA = 1 PSI
16.7 PSIA = 2 PSI

I don't have the MAF hooked up.

I have attached the LOG file


% Fuel Increase

Timing in Degrees

Volts
kingofl337 is offline   Reply With Quote
Old 08-24-2008, 09:44 PM   #2
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,437
Total Cats: 84
Default

Increase your clamp voltage to about .420
olderguy is offline   Reply With Quote
Old 08-26-2008, 06:20 PM   #3
Junior Member
Thread Starter
 
Join Date: Oct 2005
Location: New Hampshire
Posts: 248
Total Cats: 0
Default

I tried as you suggested and didn't notice a difference in the cars behavior.

Any other ideas? I think it's stumbling from being too rich but I don't see what would cause it.
kingofl337 is offline   Reply With Quote
Old 08-26-2008, 10:21 PM   #4
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,437
Total Cats: 84
Default

A clamping voltage of .47 would be neutral and the ECU would throw in no fuel. Maybe you are not getting the voltage to the ECU O2 line that you think you are.
olderguy is offline   Reply With Quote
Old 08-27-2008, 03:31 PM   #5
Junior Member
Thread Starter
 
Join Date: Oct 2005
Location: New Hampshire
Posts: 248
Total Cats: 0
Default

I'll use one of the analog inputs and log the voltage at the ECU and see what I come up with.

Thanks for your help.
kingofl337 is offline   Reply With Quote
Old 08-27-2008, 07:34 PM   #6
Senior Member
iTrader: (7)
 
Join Date: Mar 2005
Location: VT
Posts: 939
Total Cats: 0
Default

I know when using the EMB with larger injectors and no AFPR on later model cars (like a Protege), It always needed to clamp at 0 psi, or it would stumble, looks like your clamping at ~2psi?
The ECU's would always stay closed loop til 5K rpms, even WOT.

I wonder what your datalog shows.

Also I noticed your not running any extra timing in the "NA" region. Do you have to reset base timing with the AEM?

Does the AEM have a over-boost protection? (I made that mistake on MS once...LOL...) It was pre-programmed to 1.5psi..LOL... Tough to drive a bucking Coldside S/C even up the street (even partial throttle sees boost @ 1500rpm's--try going UP a hill)
Jefe is offline   Reply With Quote
Old 09-02-2008, 09:33 AM   #7
Junior Member
Thread Starter
 
Join Date: Oct 2005
Location: New Hampshire
Posts: 248
Total Cats: 0
Default

I still have the voodoo box I was running before. I'm going to call FM and see if I can use just the clamp. If I can I'll log that data hopefully get it to work right in the FIC. According to the guys at AEM I shouldn't need to re-time the car.
kingofl337 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
Noob to Miataturbo from MA JxPhan Meet and Greet 3 10-02-2015 03:17 AM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 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 12:06 AM.