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hard starting when cold

H

hooks

Guest
A while back someone on this forum advised me about my hard starting problem when engine is cold--they said to replace the temp sensor because the ecm was not telling the sensor that the engine is cold. Where is the temp sensor located & how hard to replace? Car is 1993
 

gmjunkie

Well-known member
Joined
Nov 11, 2004
Messages
4,547
Location
Old Fort NC/Vero Beach FL
Corvette
03 Z-51,78 L82 Coupe
A while back someone on this forum advised me about my hard starting problem when engine is cold--they said to replace the temp sensor because the ecm was not telling the sensor that the engine is cold. Where is the temp sensor located & how hard to replace? Car is 1993
It Twas Me!!! It's in the front top of Water Pump housing #10 Have checked the Codes? It would be that the sensor is not telling the ECM that the engine is cold!! A vacuum leak can act the same too!!:upthumbs :w
 
S

speedmaster4

Guest
these temp sensors are notorious for working good for years and also for NOT...the ecm is highly reliant on CTS input...you can easily check your CTS by unplugging the connector, reading the resistance with a $4 digital VOM and comparing to correct resistance as given in the FSM for your year...many are off calibration but not bad enough to throw a code, just enough off to mess up starting and gas mileage...most can be changed out without even draining the coolant from the car --remove the radiator cap to vent any pressure (NOT while the engine is HOT) and then reinstall the radiator cap, loosen the old CTS, have the new one right next to hole when you unscrew the old one and make the changeover with steady hand (do not try to be too fast -- that is when trouble will find you)...expect to loose maybe a half cup of coolant.

be careful not to let coolant run onto the lt1 opti distributer, might kill that...make a temp ''raincoat'' for the opti from a shop rag+ plastic bag while you play.

really can't complain about what these do for the $40 that they cost, tho...a similar type sensor for industrial use costs abt $200
 
S

SKIPPY

Guest
i read this post as i had the same problem and it was a quick and simple $15 fix.
 

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