Rev ms2v3 99 miata rpm jumping - 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 06-20-2013, 06:22 PM   #1
Newb
Thread Starter
iTrader: (1)
 
Join Date: Apr 2011
Location: San Jose, ca
Posts: 28
Total Cats: 0
Default Rev ms2v3 99 miata rpm jumping

I got 99 miata with rev ms2v3 install in my car 4 days ago and now my rpm gauge jumping all the time and sometime it just sit at 0rpm with car running. When I hook up the laptop rpm reading at 850rpm what it suppose to be. I don't know what wrong w it can someone help out thanks
antransj is offline   Reply With Quote
Old 06-22-2013, 08:29 PM   #2
Junior Member
iTrader: (5)
 
Join Date: Mar 2012
Location: Gilbert, Az
Posts: 337
Total Cats: 26
Default

Check your electrical grounds, take some sandpaper to both surfaces & clean 'em up then snug the bolt on.
One on the driver's side of the throttle body, one underneath the brake master cylinder area. Probably a few others that people could recommend. Make sure your battery cables are clean/tight as well.
SJP0tato is offline   Reply With Quote
Old 06-22-2013, 09:57 PM   #3
Newb
Thread Starter
iTrader: (1)
 
Join Date: Apr 2011
Location: San Jose, ca
Posts: 28
Total Cats: 0
Default

It was fine on the first few days when I install it. I have 99 miata w 01 gauge msm turbo, 305cc injector, and toy cop wire as wasted spark
antransj is offline   Reply With Quote
Old 06-23-2013, 12:16 AM   #4
Junior Member
iTrader: (5)
 
Join Date: Oct 2011
Location: San Diego, CA
Posts: 402
Total Cats: 21
Default

Mine actually did this a few times right after I got it installed. But it quit doing it after a day.
slmhofy is offline   Reply With Quote
Old 06-23-2013, 04:27 AM   #5
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

I had another customer with the same problem, about a year ago. He sent me his ECU back, tested fine on the stim/bench. Then I went ahead and tested it on an actual car - the problem appeared roughly after 20 minutes of idling (whereas I could leave it running on the bench for an hour or more with no problems at all).

Since it didn't show on the bench, and I didn't have the same '99 car to test on again, I just replaced the entire expansion board and that solved it per the customer.

If you want to replace the 3 components that make up the tacho circuit, I can provide instructions so that you don't have to send me the ECU back.
Reverant is offline   Reply With Quote
Old 06-23-2013, 02:08 PM   #6
Newb
Thread Starter
iTrader: (1)
 
Join Date: Apr 2011
Location: San Jose, ca
Posts: 28
Total Cats: 0
Default

Yeah can u sent me the instruction to [email protected] I'll see if I can do it without breaking anything. Thx
antransj is offline   Reply With Quote
Old 06-24-2013, 03:26 AM   #7
Newb
Thread Starter
iTrader: (1)
 
Join Date: Apr 2011
Location: San Jose, ca
Posts: 28
Total Cats: 0
Default

I figured out what's wrong... The back of my gauge all the solder for tach is melted and migrate down to the bottom of the circuit causing that noise on tach lol replaced w my old gauge everything work fine now
antransj is offline   Reply With Quote
Old 06-24-2013, 04:00 AM   #8
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Good to know.
Reverant is offline   Reply With Quote
Old 06-24-2013, 08:15 AM   #9
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

whoa, someone actually posted a follow up?!
Braineack is offline   Reply With Quote
Old 06-24-2013, 11:25 AM   #10
Newb
Thread Starter
iTrader: (1)
 
Join Date: Apr 2011
Location: San Jose, ca
Posts: 28
Total Cats: 0
Default

Lol
antransj is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
starting issue Johnny Tater Engine Performance 3 09-23-2015 07:10 PM
VE analyze and Autotune seems funny (noob) TorqueZombie MEGAsquirt 64 09-18-2015 06:03 PM
ms2e No Rpm Signal Dobzeh ECUs and Tuning 5 09-17-2015 03:56 PM
Mystery Engine Trouble. Halp, mt.net! vehicular General Miata Chat 12 09-14-2015 04:17 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 02:41 AM.