Ecu water temperature sensor

[S13FX]

Hey does any one know if there is a way to trick the ecu so I don't have to use the water temperature sensor Im talking about the one for the ecu not the one for the gauge.. Something like maybe putting a resistor in the path or something? This is for a SOHC btw

[neverlift]

long as you know that will effect timing and some fueling.

[seanman]

yeah i imagine that'd mess some ****e up

[S13FX]

I know the water temp sensor effects timing and AF ratios. but I also know that once the ECU detects proper water temp it disengages the use of that sensor until the water temp goes below a certain temperature. So now im wondering if any one know the resistor you can wire in to fool the ecu that the engine is always at proper operating temp. This will make tuning and everything so much simpler. Eliminating as many useless sensors as possible.

Someone correct me if im completely wrong on this idea.

[JNM240]

Your car would not run properly at all until it has warmed up. It wouldnt be getting enough fuel or timing retard. And what about if it overheats? I just dont see what you are trying to do as feasible or worth while. Just get a Stanza ECU, wire in a consult board, grab a laptop and tune the sucker.

[DjPantsSpecR]

yeah, it would be damn easy.

the values are easily searched in the FSM, but you could jsut use a resistor for about 190 degrees F, or whatever your thermo opens at.

however, it would be useless and would eliminate your warm-up cycles. im curious at why you were looking at doing it?

[neverlift]

he said dj to eliminate "useless" sensors. I dont think it would be that hard to wait 5 minutes to let it warm up. You do know if tuning ecu you shpoukd let the car warm up to full operating temp then shut off and start the car, once start enrichment is over the a/f ratios and timing should be read directly off the maps. Too hot which would man your overheating will pull time if your engine is running cooler it adds timing. This is know facts. The ecu temp reads all the time but only adjusts when not in the happy middle. Like its cooling off outside your ecu know that because your water temp is a few degrees cooler an adds just a bit of time. Why do you think when the car is not fully warmed it feels like it has more powa.(its givven extra timing)

[DjPantsSpecR]

yeah, its definately not a useless sensor. its one of the five that i think everyone should have

cts, maf, o2, tps, knock.

its not useless, and i agree you should just get a stanza ecu and start tuning rather than messing with sensors

[neverlift]

i dont have knock or o2 sensors. Well I have an o2 sensor but I monitor all time realtime. If you own a 89 90 your scared on the knock sensor. I just leave my stock knock map alone in the bins.

[S13FX]

Ok I understand what you guys are saying. here is what I was thinking. I have a SOHC, and in the last two months I have learned a great deal about eeprom burning and eeprom tuning my car. Now I know exactly what you guys mean about it adjusting timing to make the car run cooler or warmer and what not.

Here is my idea. SOHC engines are notorious at least the ones I have/had for blowing Thermostats and Screwing up radiator caps. So I was thinking once I learn more about the whole cooling process in the SOHC maps I wanted to eliminate the thermostat all together and just run a restrictor, and then just try and adjust all the timing procedures and everything my self running a autometer thermostats to the ecu for more accurate readings. But now that I think about this I can do all this through just the maps on the software so this thread is useless sorry.

I guess staying up 48 hours at a time screws my brain up hehe