How accurate does the CTS need to be?
Thread Starter
Joined: May 2012
Posts: 443
Likes: 117
From: Arcadia, OK
Car: 1990 Pontiac Firebird Formula
Engine: L31 350 TPI
Transmission: Tremec TKX
Axle/Gears: 3.23 Posi
How accurate does the CTS need to be?
I have noticed a cold long crank the last few weeks and wondered if it might be CTS related, so I checked it with the DVOM and it read 2.890K at 65 degree ambient temperature. Chart shows that it should be about 1K higher resistance at that temperature. Last data log I did (on Sunday) showed 85 degree CTS reading at start-up with ambient of ~65 degrees, so about 20 degrees off. Is this enough to cause a problem? The CTS was replaced when I did my original TPI conversion a few years ago and then transferred to the L31 about 10 months ago (about 3,000 miles total). Complete disclosure: also replaced the ICM a few weeks ago (AC/Delco D1943A).
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: How accurate does the CTS need to be?
Yes. Replace it.
GD
GD
Thread Starter
Joined: May 2012
Posts: 443
Likes: 117
From: Arcadia, OK
Car: 1990 Pontiac Firebird Formula
Engine: L31 350 TPI
Transmission: Tremec TKX
Axle/Gears: 3.23 Posi
Re: How accurate does the CTS need to be?
Thanks, ordered a new sensor. Just didn't want to have to swap it out unless really necessary.
Thread
Thread Starter
Forum
Replies
Last Post