MS2E, Added Turbo, Idle very erratic - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to   Members

MEGAsquirt A place to collectively sort out this megasquirt gizmo

LinkBack Thread Tools
Old 05-02-2014, 08:24 AM   #1
Senior Member
Thread Starter
iTrader: (5)
Join Date: Nov 2013
Location: Wisconsin
Posts: 659
Total Cats: 66
Default MS2E, Added Turbo, Idle very erratic

I had my car running really well with my MS2E on an NA motor, the tune was great. I added a turbo, and now the idle is awful. It bogs and jumps and sputters and then dies completely.

The really weird thing is that sometimes it'll idle really, really well for a good 10-15s and then it'll go back to being a stupid-head.

It was also pig rich at idle, but I attributed that to my BOV leaking at idle, so I unplugged the vac source from the BOV and leaned out the VE cells at idle like 2 points or so.

I know adding a turbo complicates things, but I was under the impression that my idle really shouldn't change all THAT much. And I have no idea what would be causing it to be so erratic.

I'm going to troubleshoot a bit today. Make sure my map signal line is good (it got unhooked and re-hooked up in the process), maybe try throwing the old intake back on right at the intake manifold and see if that changes anything, etc..

Here's my current tune and a log of it being erratic. I see my MAP is bouncy, but I'm not sure if that's a CAUSE or an EFFECT of the RPM being bouncy.. :(
Attached Files
File Type: msq 2014-05-01_22.15.41.msq (93.8 KB, 20 views)
File Type: msl 2014-05-01_21.57.11.msl (82.5 KB, 16 views)
mlev is offline   Reply With Quote
Old 05-02-2014, 02:35 PM   #2
Senior Member
Thread Starter
iTrader: (5)
Join Date: Nov 2013
Location: Wisconsin
Posts: 659
Total Cats: 66

Well, I also relocated my ECU to my glovebox (kept kicking it under the dash, which is no bueno probably lol) and I just un-re-located it and it works great.

Not sure if the problem was the longer MAP vacuum line, or if it was the DB37 extension cables I used, but either way, when I moved it back the issue resolved itsself.

I'll probably test just to see which was causing the problem--but I think at the end of the day I'm just going to keep the ECU under the dash and try to mount it a bit higher up or something so it doesn't give me issues.

I was fine in my prototipos, but the lady friend and I took it on a date and my dress shoes were too long. :(
mlev is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 07:18 PM
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
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 02:44 PM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 06:40 AM

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 06:53 AM.