Idle fluctuation + power loss - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to   Members

MEGAsquirt A place to collectively sort out this megasquirt gizmo

LinkBack Thread Tools
Old 06-11-2007, 02:23 AM   #1
Elite Member
Thread Starter
iTrader: (7)
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default Idle fluctuation + power loss

fluctuating idle. and rough accel for a split second even in neutral. could it be a vacume leak? sometimes my idle is perfect and then my idle goes from 800-1200 and back and fworth for a while. also since installing the MS on my NA i have noticed a loss of power in the power band. i got my Wideband gauge working and my boost gauge working although the wideband isnt hooked up so its just lights. whats everyones accel deccel value set at. currently its 3.0 and not doin very good. BTW cars stock.

My boost gauge (its hooked up) is normally at 20 then when my idle starts fluctuating it goes up and down a few bars.

Help wth idle and maybe the accel?
Could the loss of power mean its leaning out?
SKMetalworks is offline   Reply With Quote
Old 06-11-2007, 09:32 AM   #2
Supporting Vendor
iTrader: (5)
Join Date: Jun 2006
Location: Duluth, GA 30097
Posts: 798
Total Cats: 0

The MSnS-E closed loop idle works fairly well though you will notice some oscillations as it settles into a smooth idle, and moreso if you have the A/C turned on.

As for accel values and getting the best power from your car the base map will be a good start but surely will need to be fine tuned for each car to get the most out of your ride. When you installed the software package that came on the CD it installed the MS1 Extra tuning manual as well which will cover tuning accel enrichments. One thought there-- are they problematic when cold or when the engine's fully warmed up? Or both?

Then as for power.. again, tuning... we dialed in a beautiful map on pump 93 here, but as it was dialed in to optimum for our local pump93 fuel and conditions and we can't be sure what fuel people will be using, nor what other conditions the car will be run under, that's not the map that was given out exactly.... it's really close, just with a very mild amount of advance pulled.

Another thought-- is your base timing set correctly? We aimed on the safer end of the spectrum here too--- saf'ER' being the key letters there. If you're running the default trigger angle (as shipped on the MSPNP, if you didn't set base timing) then you're probably about 8-13 degrees retarded everywhere depending on where your CAS is. That's safER than 10 degrees advanced . Note it's still not ideal to run alot of retard all the time as you're EGTs will skyrocket.

Last thought at the moment... when you set base timing you set the 'fixed angle' to '10' which locked timing to 10 degrees so you could set it with a light. Did you set it back to '-10' after the fact and burn it? If not you're running a fixed 10 degrees, and that will be SLOW and EGTs will be HOT....
FoundSoul is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 52 08-28-2016 04:18 AM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 09:39 AM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 09:30 AM
Odd Steering issue interestedofold Suspension, Brakes, Drivetrain 5 09-29-2015 01:42 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 On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 05:09 AM.