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Ok guys, I know this may not be a normal topic for this forum but I am wanting to know if I’m thinking correctly. I have a 1997 Chevy lumina 3100 engine demolition derby car. Mostly I always took the temp sensor out and just zip tied it in the fresh air to eliminate the car going into limp mode when it got hot. Now this year I actually wired in a 250 ohm resistor from the computer signal to ground giving the illusion that the car was at normal operating temp, roughly 190 degrees. My question is whats a better temp sensor reading when trying to start and run when the car is overheated? Normal operating temp or colder like it ambient air temp as if the sensor was just zip tied out in fresh air. I would think the warmer it reads the better because it’s closer to the fuel air ratio it needs to run, but I just want to make sure I’m thinking right
Coolant temperature on most engines I see only has and major effect on fuel ratio after a cold start. During a warm start the computer just uses a base map before going closed loop then at WOT is open loop.
I don't know much if anything about these engines wonder if you might have an issue with heat soak in the fuel rail?
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
I think I'd stick with leaving the ECT in the atmosphere, or wiring in a higher value resistor instead. You can always just unplug it, too? Dunno if there's something in the rules that forbids that or not.
I did some fiddling around with ECT on my car awhile ago, might be worth reading:
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