Hi, I'm still trying to find the resistance values of the original coolant temp and air temp sensors on a 2.0 Pinto engine. Does anyone happen to have them?
tia
jos

Cant you measure them yourself? Just measure the resistance in:

A glass of well iced water (1-2 degrees C)
Room temperature (20 degrees C)
Boiling water (99-100 degrees C)

to give you the three pairs required for Easytherm.

It doesn't make any difference even if the temperatures are off by a couple of degrees. I'm sure someone you know will have a meter if you don't have one yourself.

I do have some values for the coolant sensor from a carbed Pinto of unknown origin, but my laptop is in Bristol and I am in Detroit! My sensor may well be different to yours anyway

This info direct from Megasquirt forum:

quote:

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I got some info from alldata

all EEC-IV 83-90
coolant and air charge sensors are as follows

code:
 

ohms          @   deg. f/c 

31700-42900       68/20 

13650-18650       104/40 

6500-8900         140/60 

3240-4440         176/80 

1770-2370         212/100 

980-1380          248/115 

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that's absolutely nothing like the values i got when measuring the values on my sensors...

I will try to dig them out

Don't think it's much like what I got now you come to mention it!

OK

my standard EFi pinto 2.0 water temp sensor (little 1/8" NPT jobbie) read the following:

temp - ohm
4.8 - 956
5.8 - 917
6.8 - 882
7.5 - 848
10.8 - 767
11.5 - 698
13.5 - 640
40.8 - 211
54.8 - 126
55.8 - 123
56.8 - 121
57.5 - 119
58.8 - 119
67.8 - 91
70.8 - 88
72.5 - 90
73.8 - 90
75.8 - 90
77.5 - 89
78.8 - 89
79.8 - 89
80.8 - 90
81.5 - 90
82.5 - 90
83.1 - 91
84.8 - 91


tempratures in degrees C

as you can see - vastly different!!!

[Edited on 14-4-08 by DaveFJ]

For the coolant temp sensor, this one makes sense to me as I'm measuring like 60K at around 10 C, while hot engine (more or less 90 C) shows 2.94K. For the air temp sensor, on the other hand, I meausure 1.3k at 10C and .962 with a hot engine (so not necessarily high air intake temp.) So if I could find the proper sensor values for the air temp sensor, the question would be fully answered.

quote:

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Originally posted by matt_claydon
This info direct from Megasquirt forum:

quote:

---

I got some info from alldata

all EEC-IV 83-90
coolant and air charge sensors are as follows

code:
 

ohms          @   deg. f/c 

31700-42900       68/20 

13650-18650       104/40 

6500-8900         140/60 

3240-4440         176/80 

1770-2370         212/100 

980-1380          248/115 

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