Stumble (HELP!!!) - 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 01-04-2009, 06:48 PM   #1
Senior Member
Thread Starter
 
Join Date: Jun 2006
Location: Orlando FL - UCF
Posts: 688
Total Cats: 1
Default Stumble (HELP!!!)

I seem to have an odd miss whenever the motor starts to see a heavy load, and it is more prominent in higher RPMs.

I get a reset every now and then, but mostly it feels like spark blowout. My plugs are gaped to .02, and I just replaced the coil pack today, so that is not it.

Every time it stumbles my TPS, coolant, RPM, and I imagine a few other readings go crazy in MLV. I'm thinking maybe adding a few grounds, but I am clueless as far as any other fixes.

Attached is my log and tune, and I would really appreciate any help as I am heading back to Orlando tomorrow (6 hours) and would like to drive the car back rather than ride with a friend.
Attached Files
File Type: xls datalog200901041657.xls (1.56 MB, 63 views)
File Type: msq Tune2.msq (35.2 KB, 92 views)
coastertrav is offline   Reply With Quote
Old 01-05-2009, 03:04 PM   #2
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

I see it - you're getting RPM spikes. Check for a problem with the CAS, the tach input circuit, or the wiring that connects them.
Matt Cramer is offline   Reply With Quote
Old 01-05-2009, 03:11 PM   #3
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Have you performed the Hi Res cap mod?

Have you change the resistors for the miata specific spark mod?

Have you thanked Jesus lately?
Saml01 is offline   Reply With Quote
Old 01-05-2009, 10:42 PM   #4
Senior Member
Thread Starter
 
Join Date: Jun 2006
Location: Orlando FL - UCF
Posts: 688
Total Cats: 1
Default

I have done the cap mod, but not the new ignition circut.


My dad suggested getting new plug wires.

IDK?
coastertrav is offline   Reply With Quote
Old 01-06-2009, 12:13 AM   #5
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Do the spark mod first, its 99 cents vs 40 for plug wires.
Saml01 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
6ULs for Sale in Green Bay JStoops Miata parts for sale/trade 0 09-28-2015 06:35 PM
hesitation/stumble *pics gompers General Miata Chat 25 10-06-2009 08:08 PM
The Mite Qckslvr Insert BS here 7 03-05-2009 04:35 PM
help strange problems with link! spoolin2bars ECUs and Tuning 2 01-23-2009 11:37 AM
stumble/misfire? gompers General Miata Chat 6 01-15-2009 06:03 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 05:03 AM.