MEGAsquirt A place to collectively sort out this megasquirt gizmo
Sponsored by:
Sponsored by:

Jumpy/Inconsistent Tach

 
Old 12-02-2018, 06:29 PM
  #1  
Newb
Thread Starter
 
Join Date: Sep 2016
Location: Tampa, FL
Posts: 17
Total Cats: 0
Default Jumpy/Inconsistent Tach

Background:

90 Chassis
DIY MS3X
02 VVT Motor

So I've had the car up and running on the MS3X and VVT motor for about 2 months now and for the most part things are fine. Two mornings ago, my tach started jumping and bouncing around, it usually stays between 4 and 5k. It will be normal on startup but will go inconsistent within a minute or so. When I get to about 4500rpm the tach signal is synchronized again, all the way to redline and will be inconsistent as soon as they fall below that same threshold.

The car ran normal and TS displayed the correct rpm so my first thought was wiring. I checked the grounds and my breakout box and everything seemed fine. This afternoon, the car would be idling and the tach would be synched, then it would go rich and die unless I kept it alive with throttle. I can post a data log as soon as I get home. Any other areas I should check?
Cutthroat912 is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mj71
MEGAsquirt
29
12-06-2008 01:35 PM
wes65
General Miata Chat
2
02-10-2008 06:56 PM
OldAndInTheWay
E-Manage
0
01-02-2008 10:02 PM
Dow.tom
MEGAsquirt
1
08-12-2007 12:22 AM
Hi Im Simon
MEGAsquirt
8
02-24-2007 10:23 PM


Thread Tools
Search this Thread
Quick Reply: Jumpy/Inconsistent Tach


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.