ECUs and Tuning Discuss Engine Management, Tuning, & Programming
Sponsored by:
Sponsored by:

Odd sputtering issue at certain RPM

 
Old 08-27-2018, 10:35 AM
  #1  
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Jun 2010
Location: Niagara Falls NY/ Ontario, CA
Posts: 147
Total Cats: 8
Default Odd cut out/stuttering issue at specific RPM

car: 1993 chassis with MSM engine (8.6 pistons) and no turbo installed yet. AEM EMS V1, NB cam/crank w/ 12+1 wheel, AEM MAP, GM IAT, NB1 mani (VICS wired in), NB TPS w/ VTPS, stock injectors w/ m-tuned dual feed rail, DW300 and fuellab fpr.

I tried to get a base map on my car at some local tuners. Spent a few grand and each time I got back a car that didn't run so I've been doing this on my own. Grabbed another ecu off someone here with a similar set up and managed to get the car running fairly well.

Only issue is that around 5k rpm the car sputters/box and stops. According to the wide band its not going too lean. Plus gap is stock, Tried other coils/wires/cam/crank sensor, re-gapping the crank sensor and the timing map seems comparable to another miata we have with a VVT swap.

Car pulls great up until then but it just feels like its hitting a rev limiter. Any ideas would be apreciated

Last edited by Neilv; 09-06-2018 at 08:05 AM.
Neilv is offline  
Old 09-04-2018, 11:47 AM
  #2  
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Jun 2010
Location: Niagara Falls NY/ Ontario, CA
Posts: 147
Total Cats: 8
Default

Pulled some timing and added a little fuel at the top end. Weirdly now it does the same thing at 4K rpm. If I lightly accelerate I can get past 4K and from 5-7 its just fine. What the....
Neilv is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Lol256
Engine Performance
49
08-04-2018 04:36 AM
.one lane
General Miata Chat
4
03-18-2017 08:34 AM
kenzo42
MEGAsquirt
6
01-18-2008 03:21 PM
Bronze
Prefabbed Turbo Kits
11
07-11-2007 07:57 AM


Thread Tools
Search this Thread
Quick Reply: Odd sputtering issue at certain RPM


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.