Coolant temp Issues
Thread Starter
8th Gear
Joined: Feb 2011
Posts: 8
Likes: 0
Coolant temp Issues
Hey guys I'm new to the site. I've been looking around and decided to pick ya'lls brains.
My 94 6-spd car is having issues. It starts fine when its not cold outside but dies about 4 times before it idles on its own. Once the car warms up it's hard to start. My temp gauge works fine but when i check the temp on the digital gauge it stays at 142 and the scanner says -40. Any sugestions?
Thanks,
Charlie
My 94 6-spd car is having issues. It starts fine when its not cold outside but dies about 4 times before it idles on its own. Once the car warms up it's hard to start. My temp gauge works fine but when i check the temp on the digital gauge it stays at 142 and the scanner says -40. Any sugestions?
Thanks,
Charlie
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
Wouldn't hurt to look for codes.
Those temp values you got seem like from another planet.
Are you sure the CTS is good and installed correctly?
Correct cold start means it runs ok in "open loop" mode, during which ECM uses assumed values and gets no input from CTS (and other sensors).
Those temp values you got seem like from another planet.
Are you sure the CTS is good and installed correctly?
Correct cold start means it runs ok in "open loop" mode, during which ECM uses assumed values and gets no input from CTS (and other sensors).
Last edited by sailorsteve; Feb 15, 2011 at 04:39 PM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Temp values as written in the tune bottom out @ -40C
As the CTS has higher resistance with lower temp
185 Ohms @ 210F,
3400 Ohms @ 68F,
7,500 Ohms @ 39 F.
that temp reading from the PCM would indicate open circuit on CTS wiring
As the CTS has higher resistance with lower temp
185 Ohms @ 210F,
3400 Ohms @ 68F,
7,500 Ohms @ 39 F.
that temp reading from the PCM would indicate open circuit on CTS wiring
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Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
Yes, it could be anything that interrupts the circuit. If you changed the CTS and saw the same results, it is not likely that both sensors are equally defective. Diagnostic info from the FSM would lead you step by step to the solution. Meanwhile, if you can pull a code, you can get some specific suggestions here.
Thread Starter
8th Gear
Joined: Feb 2011
Posts: 8
Likes: 0
Been a little more than a month but I finally got a little time to work on the car this past weekend. Unpluged the CTS and looked into the plug and noticed it was a little dirty. I traced the wires back and then noticed the plug had been replaced before, so at this point I just went ahead and picked up a new plug.
Got out there Friday evening and cut the wires and then soldered and heat shrinked it all back together and BOOM!!!! worked like a champ. No more Check Engine Light!!!
Gas milage has been up in the 28-30mpg while cruising in 6th gear on the freeway at about 64-67mph. No more hard starts when it warms up, and just seems to run better all around.
Thanks for all the sugestions guys. I'll definately be around the boards.
Charlie
Got out there Friday evening and cut the wires and then soldered and heat shrinked it all back together and BOOM!!!! worked like a champ. No more Check Engine Light!!!
Gas milage has been up in the 28-30mpg while cruising in 6th gear on the freeway at about 64-67mph. No more hard starts when it warms up, and just seems to run better all around.
Thanks for all the sugestions guys. I'll definately be around the boards.
Charlie
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
Been a little more than a month but I finally got a little time to work on the car this past weekend. Unpluged the CTS and looked into the plug and noticed it was a little dirty. I traced the wires back and then noticed the plug had been replaced before, so at this point I just went ahead and picked up a new plug.
Got out there Friday evening and cut the wires and then soldered and heat shrinked it all back together and BOOM!!!! worked like a champ. No more Check Engine Light!!!
Gas milage has been up in the 28-30mpg while cruising in 6th gear on the freeway at about 64-67mph. No more hard starts when it warms up, and just seems to run better all around.
Thanks for all the sugestions guys. I'll definately be around the boards.
Charlie
Got out there Friday evening and cut the wires and then soldered and heat shrinked it all back together and BOOM!!!! worked like a champ. No more Check Engine Light!!!
Gas milage has been up in the 28-30mpg while cruising in 6th gear on the freeway at about 64-67mph. No more hard starts when it warms up, and just seems to run better all around.
Thanks for all the sugestions guys. I'll definately be around the boards.
Charlie
