Not to try to change the subject, but will the gauge read a GM coolant sensor directly? If so you could cheat and probably use a 3 wire CTS like I did.
i find it amusing that SHOoff has nothing better to do but follow me around & be an unhelpful dick in even cross-forum. - Jon Mick
I didn't know they made 3-wires? what's the third wire for? sender, ground and...? I just bought a 40mm adapter and some 2-wire temp sensors so I think I got it figured out. The 2-wires have a specific ground unlike the crappy single wire sensors I got from Sunpro which ground themselves and never seem to work.
http://www.cardomain.com/id/Gerkn
On the 2nd gen cars typically there would be 2 seperate sensors on a V6 car (second one was drilled into the rear cylinder head), because one of them went to the ECU and one of them went to the dash for the gauge. But the 2.2 car didn't have a 2nd spot for a coolant sensor, so the GM 3-wire goes in there to give 2 outputs for 2 devices to read the coolant sensor.
I went this route with my 3400 swap because I run a Megasquirt-II , but the stock PCM is in there to run the gauge cluster. Trying to hook both up to the 2 wire sensor made the gauge work ok, but the MS unit only would see 60 degrees or so on the coolant, and constantly stay in warmup mode. Once I popped the 3-wire sensor in there both ECU's worked just fine (the 3 wire sensor has 2 outputs, as mentioned). I went this route rather than drill/tap the cylinder head for a 2nd sensor.
i find it amusing that SHOoff has nothing better to do but follow me around & be an unhelpful dick in even cross-forum. - Jon Mick
