Cold weather No Start
#1
Cold weather No Start
H3 wont start when weather below 45 degrees. New battery ,new terminals, new computer, new MAP sensor, cleaned throttle body. When taken to shop its so warm in shop it starts up and doesnt throw any codes. Drove home friday, wake up saturday it cranks but wont start. When on On position the locked car symbol stays solod on dash and doesn't blink. Would it be an ignition switch, ignition module problem or a thermostat problem due to cold temp? Why would cold temps effect ignition switch? Please help before I go bankrupt on this thing.
#3
Hook up your H3 to a battery charger and try doing a passlock reset. Sounds like something is contracting in the cold causing a disconnect. That's all I got other taking the H3 to your mechanic and it gets diagnosed outside in the cold.
#6
Aftermarket, the terminals that were on it were hot trash, would never replace with the same terminals.
#9
Chance of you needing an Intake Manifold gasket are super slim. It is a known issue with the I5s (due to inherent vibrations) that the intake manifold bolts can become loose and create a leak, tighten them down and drive on.
See this: https://www.hummerforums.com/forum/h...what-do-33916/
#10
Start by re-torquing the manifold bolts, correcting the lean condition, which would then eliminate the need for O2 sensor replacement. GL