Temperature Sensors

[pbanders]

please ignore

[This message has been edited by pbanders (edited 04-19-2001).]

[bowlsby]

I have complied various data from various sources, which you may already have.

TS1
@14F 860-1200 ohms
@68F 260-340 ohms
@122F 90-130 ohms

TS2
@14F 7000-12000 ohms
@68F 2000-3000 ohms
@122F 680-1000 ohms

A plot curve showing temp/resistance relationship would be helpful for those times when you are not at exactly the ambient temp shown so interpolation wouldn't be necessary.

[Dave at Pelican Parts]

Hey, Jeff--any part numbers, or specific model-year listing, for the two sensors you cite above?

--DD

[bowlsby]

Nope.

These values came from Kjell Nelins article, and other 914-related publications. I have confirmed my working FI system to be within these tolerances on my 74 2.0...so part numbers could be obtained.

I have assumed that they are applicable to all years 914 Djet systems.

I would expect that if several sensors are tested, that a range of values would be discovered, all within factory tolerance, which has concerned me some. I would think the ECU would be fairly sensitive to minor sensor value changes.

Especially the injectors themselves, with only 2.4 ohms value. The FI harnesses can vary by a few ohms just in their inherent wiring, espoecially on old harnesses with corroded connections. I think it would be interesting to dyno a car or scope an engine with both an old and new harness to see if there is any marked difference in updating the wiring.