whiteboyslo
OBS Enthusiast
Found the CTS on my truck. Looks original. I don't have a scan tool, but the ACDelco part is a whopping $15, so what the heck...
Mike
Mike
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Thank youThere are probably other versions online, but here is one from lmctruck.com
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9 mpg 454ss? Totally worth it
What am I missing hear? Both my 1996 ECSB and my 1999 Yukon both 5.7L run @160 degrees F. Both will burn you out of the truck @ -10 below. I assume both are factory thermostates. Anyone ?If you guys are concerned about your gas mileage, one thing to verify is that your coolant temperature sensor is reading accurately. I am not talking about the one that screws into the cylinder head and drives the gauge on your dash, but rather the one that is screwed in next to your thermostat. That one beside the thermostat is what your ECM reads.
The one on one of my 1999 Suburbans was reading inaccurately, would never read above 150 f according to my scan tool. The truck has to get to somewhere around 185 to 190 before the ECM begins running the proper fuel-air ratio.
Find a scan tool that can measure what the OBD2 system thinks the coolant temperature is. If you have a 195 thermostat, and you cannot get the OBD system to read at least 188 or higher, it may actually be that hot, but the computer won't know it, and constantly running rich.
What am I missing hear? Both my 1996 ECSB and my 1999 Yukon both 5.7L run @160 degrees F. Both will burn you out of the truck @ -10 below. I assume both are factory thermostates. Anyone ?
What am I missing hear? Both my 1996 ECSB and my 1999 Yukon both 5.7L run @160 degrees F. Both will burn you out of the truck @ -10 below. I assume both are factory thermostates. Anyone ?
If you guys are concerned about your gas mileage, one thing to verify is that your coolant temperature sensor is reading accurately. I am not talking about the one that screws into the cylinder head and drives the gauge on your dash, but rather the one that is screwed in next to your thermostat. That one beside the thermostat is what your ECM reads.
The one on one of my 1999 Suburbans was reading inaccurately, would never read above 150 f according to my scan tool. The truck has to get to somewhere around 185 to 190 before the ECM begins running the proper fuel-air ratio.
Find a scan tool that can measure what the OBD2 system thinks the coolant temperature is. If you have a 195 thermostat, and you cannot get the OBD system to read at least 188 or higher, it may actually be that hot, but the computer won't know it, and constantly running rich.
Also note, my only experience is the 5.7. I'm assuming the Big Blocks and diesels have a similar scenario that could happen
Don't depend on the sensor reading as a bad CTS will often report a lower temperature than actual. This is why a failed CTS causes the fuel mixture to be too rich.Also, are you taking this temperature reading from what's on your dashboard? Every Chevy I've ever had from this generation always reads lower than reality on the dashboard. They all vary in how inaccurate they are, but they are al
Often definitely inaccurate, they always read low.
Verify that your engine computer actually thinks you're running at 160 by measuring the temperature via and OBD2 scanner that can read live data. Or just make sure that your thermostat is a 195 that is functioning properly
Right now I have two of them, one truck always says that it's at about 140, the other one says it's at about 170, but if you hook the scanner up to it, both of them run from 188 to 194 and both have a 195 thermostat