MEGAsquirt A place to collectively sort out this megasquirt gizmo

Inverted Coolant Temperatures

Thread Tools
 
Search this Thread
 
Old 10-31-2010, 03:33 PM
  #1  
Newb
Thread Starter
 
evad's Avatar
 
Join Date: Aug 2008
Location: Jacksonville, FL
Posts: 3
Total Cats: 0
Default Inverted Coolant Temperatures

I have a MSI that I assembled on a 96 in a parallel mode. The coolant temperature reads high, 170 F, and decreases as the engine warms up. The IAT reads in the right direction although I need to get the correct parameters set up in Easytherm.

I have both R7 and R4 removed since I am sharing the CLT and IAT with the stock ecu. I have had the MSI installed for over a year with 3 dpdt switches to switch the injectors and spark between the MSI and stock ecu. I have been running off the stock ecu since tunning with an inverted CLT is no good. A scangauge is also attached so that I can monitor the ODBD II parameters.

I have confirmed that the CLT sensor is wired to the yellow wire, pin 21 , of the MSI via the 3g terminal on the center ecu connector. The voltage of this wire (relative to ground) decreases as the engine warms up. If I remember ohms law correctly this is the correct behavior for a thermistor (CLT sensor) whose resistance drops with increasing temperature.

Reflashing the firmware, 10g, makes no difference.

What did I screw up?
evad is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
slomiata
MEGAsquirt
5
10-07-2015 01:11 PM
tazswing
Race Prep
20
10-03-2015 11:04 AM
FrankB
Race Prep
10
10-02-2015 09:00 PM
shooterschmidty
Engine Performance
8
09-30-2015 10:28 PM



Quick Reply: Inverted Coolant Temperatures



All times are GMT -4. The time now is 01:59 AM.