AEM
Sponsored by:
Sponsored by:

EMS4 MAP Issue

 
Old 10-26-2014, 04:08 PM
  #1  
Junior Member
Thread Starter
 
Join Date: Oct 2011
Posts: 97
Total Cats: 0
Default EMS4 MAP Issue

I am installing the unit into a 1990 with the trackspeed patch harness, and I think I have everything working except for the TPS and the MAP. Initially my TPS was stuck at 100% and putting the injectors into flood control mode, ie-no fuel was passing the injectors. Finally got the minimum % fixed then determined the power wire had no juice, which is an easy fix. In looking at the calibration when trying to start I noticed that the MAP was reading full vacuum, so I checked the wiring at the sensor. I had ground and 5volt to the sensor and then also found that the signal wire also had 5volts on it coming from the ECU. Any help diagnosing this issue would be helpful.
gthill13 is offline  
Old 10-26-2014, 04:13 PM
  #2  
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,281
Total Cats: 1,997
Default

Email me.
__________________
Trackspeed Engineering
High-Performance Turbo Specialists - Sunnyvale, CA - 650-701-7223 - Email us!
Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
Savington is offline  
Old 11-29-2014, 06:49 PM
  #3  
Junior Member
Thread Starter
 
Join Date: Oct 2011
Posts: 97
Total Cats: 0
Default IAC noise

Thanks to Savington I got the coils and injectors synched, and figured out that I had power and ground reversed on the MAP sensor. I got the car started yesterday, but could not get it to idle. Eventually remembered that the idle was controlled by the stock ECU on my old setup and had never turned on the IAC function for the EMS. So today after turning on the IAC I was able to get the engine to idle perfectly. So the IAC is making an ungodly loud buzz. Wondering if I have the frequency set to high. I think it is currently at 8,000 something.

Thanks for any insight.
gthill13 is offline  
Old 11-29-2014, 08:45 PM
  #4  
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,281
Total Cats: 1,997
Default

Which idle valve are you using? NA/NB?
__________________
Trackspeed Engineering
High-Performance Turbo Specialists - Sunnyvale, CA - 650-701-7223 - Email us!
Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
Savington is offline  
Old 11-29-2014, 09:07 PM
  #5  
Junior Member
Thread Starter
 
Join Date: Oct 2011
Posts: 97
Total Cats: 0
Default

Originally Posted by Savington View Post
Which idle valve are you using? NA/NB?
I'm using complete 2000 engine and sensors (except for 1990 oil pressure sender).
gthill13 is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Full_Tilt_Boogie
Build Threads
67
03-16-2019 08:07 PM
nick470
MEGAsquirt
1
09-30-2015 10:32 PM
MiataGarage
Engine Performance
5
09-29-2015 11:04 PM
interestedofold
Suspension, Brakes, Drivetrain
5
09-29-2015 01:42 PM
brandonbkd
MEGAsquirt
0
09-28-2015 11:52 PM


Thread Tools
Search this Thread
Quick Reply: EMS4 MAP Issue


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.