Re: 1995 3.4 camaro
You might begin looking at the two-wire coolant sensor.
Unplug it, clean contacts as ggod as you can, reconnect.
While its unplugged, measure across the two pins for resistance, should be above 5Kohms. When at operating temp, it should read around 150 ohms to 200 ohms.
Also check for intake gasket leaks, the rubber bellows between the MAF and intake for cracks, any vacuum hoses loose or cracked, dry rotted, broken plastic vacuum lines, this may include the heating system as vacuum controls the doors.
Run a can of injector cleaner in the next full tank of gas.
might need an air filter change and a spark plug change.
Is radiator full? If coolant is low, it will never heat up the coolant sensor and ECM will always stay in 'cold' mode.
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