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badass66ss · 04-20-2012, 03:07 PM

Mountie, Stabil is a great product and I use it often, especially in my 66 chevelle that doesn't get driven as much as it should.

Weasel Diesel, 91 c1500's do not have IAT sensor, but that is good info as i have seen them go bad.

I feel like the truck is not going in to closed loop operation. From what I understand, the only items that tell the ECM to go to closed loop is the O2 sensor and CTS sensor. Is this correct? I am going to check the voltage on the O2 tomorrow when the truck is at temperature. I have a 195F thermostat, and the guage seems to be reading about that temp.

04-20-2012, 03:07 PM	#21
badass66ss Registered User Join Date: Apr 2012 Location: Bakersfield, CA Posts: 23	Re: 91 c1500 stutter on acceleration Mountie, Stabil is a great product and I use it often, especially in my 66 chevelle that doesn't get driven as much as it should. Weasel Diesel, 91 c1500's do not have IAT sensor, but that is good info as i have seen them go bad. I feel like the truck is not going in to closed loop operation. From what I understand, the only items that tell the ECM to go to closed loop is the O2 sensor and CTS sensor. Is this correct? I am going to check the voltage on the O2 tomorrow when the truck is at temperature. I have a 195F thermostat, and the guage seems to be reading about that temp.