The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - stumbling/misfiring at 2500-3000 rpms

**bwood** · 08-01-2009, 08:49 PM

The sensor in question actually doesn't operate the gauge and is mounted in the intake near the thermostat. The gauge sensor is actually mounted in the driver side cylinder head.

Here is a thread that has info on testing the CTS, check post #9
http://www.67-72chevytrucks.com/vboa...d.php?t=355350

Edit: Just reread your last post. You say that your temp gauge isn't going up as high, you may have a thermostat that is not modulating at 195. It may be maintaining a lower temp (staying open too long). This would cause the CTS to see a lower temp all the time or cause it to go in and out of closed loop which would cause the TCC lockup to turn off/on.

08-01-2009, 08:49 PM	#9
bwood Registered User Join Date: Jan 2003 Location: Denison, Texas Posts: 1,919	Re: stumbling/misfiring at 2500-3000 rpms The sensor in question actually doesn't operate the gauge and is mounted in the intake near the thermostat. The gauge sensor is actually mounted in the driver side cylinder head. Here is a thread that has info on testing the CTS, check post #9 http://www.67-72chevytrucks.com/vboa...d.php?t=355350 Edit: Just reread your last post. You say that your temp gauge isn't going up as high, you may have a thermostat that is not modulating at 195. It may be maintaining a lower temp (staying open too long). This would cause the CTS to see a lower temp all the time or cause it to go in and out of closed loop which would cause the TCC lockup to turn off/on. __________________ 1998 GMC Sierra SLE 1/2 ton 2WD 305 Vortec -Gibson Stainless Cat Back Swept Side -SS Wheels 2005 Honda CRF250R 2006 Honda CRF150F Last edited by bwood; 08-01-2009 at 08:55 PM.