So, I'm trying to get my 89 ix running well enough to pass smog, but I can't get it to operating temperature and it's failing idle smog. Curious if I'm missing something dumb and obvious.
What I'm seeing:
- temp stays at 3/8 on the gauge when idle
- drops to 1/4 immediately when moving, even when driven hard
- high idle HC (219/120 allowed)
- feels a little low on power, but maybe I'm just used to M50 torque
- poked around with an IR thermometer after driving hard at high RPMs for 30m
- thermostat housing hot side is at 75C
- thermostat housing cold side is at 50C
- lower rad hose is cold enough to touch
I'm using an M30 179 ECU with a stock M20 chip in it, but the car was doing the same thing with a stock 153 ECU as well.
I've got a new CTS and thermostat to go on, but I'm not sure that they'll do much. If the thermostat is stuck closed but the motor was working normally, the car would heat way up. It smells a little rich when running, but not rich enough to stay this cool. So, what the heck? Any other bright ideas?
What I'm seeing:
- temp stays at 3/8 on the gauge when idle
- drops to 1/4 immediately when moving, even when driven hard
- high idle HC (219/120 allowed)
- feels a little low on power, but maybe I'm just used to M50 torque
- poked around with an IR thermometer after driving hard at high RPMs for 30m
- thermostat housing hot side is at 75C
- thermostat housing cold side is at 50C
- lower rad hose is cold enough to touch
I'm using an M30 179 ECU with a stock M20 chip in it, but the car was doing the same thing with a stock 153 ECU as well.
I've got a new CTS and thermostat to go on, but I'm not sure that they'll do much. If the thermostat is stuck closed but the motor was working normally, the car would heat way up. It smells a little rich when running, but not rich enough to stay this cool. So, what the heck? Any other bright ideas?
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