Need help with cold stall on'94 350tbi

[red&ready]

Hey guys I need some help with a 94 full size blazer w/stock 350
when it is cold it stalls out pretty bad (the colder the weather the worse it gets) even back firing or dying on occasion. You can dabble the gas and it will take off.once it warms up it's ok
other things I have noticed is lower gas milage,lose of power, bad fumes while idling, and it seems to idle low about 400 rpms.I have done tune up plugs,wires,coil,cap,and button.changed out throttle body,fuel pump, nothing is helping any ideas?????

[91chevZ71]

I know I say this a lot, but it may be the CTS sensor. or IAC. check 'em out. Maybe replace the CTS in the manifold and do a good once over on all the sensors

[94Blazer383]

Yup, sounds like you might be running in open loop all the time. If you have an old laptop, download datamaster, and you will be able to see exactly what the truck is doing.

[red&ready]

Hey guys just wanted to say thanks for the help I decided just for the hell of it I would check codes even though I didn't have any ses light. it threw a 32 so with that and your sug I changed both egr valve and cts sensor and the truck is back!! the only problem now is the temp gauge is about 20 deg hotter when thermostat opens ????

[1500chevy5.7l]

might be were its supposed to be ..did you replace the sensor beside the thermostat or on the side of the head the one by the t-stat is the cts for the ecm the one on the head in for the gauges...