Cooling and fuel injection somehow related?

Tiny
MWAYNEW
  • MEMBER
  • SATURN
I own a 2003 Saturn Vue- 4 cylinder, 5 speed, front wheel drive with 80,000 mi. Is the ECTS somehow connected to the fuel injection system? I recently pulled the injectors to inspect them ( around the same time I replaced the plugs) and ever since, the fan stays on, the idle is rough and the SES light is on and sometimes flashing. I know that a bad ECTS tells the computer 'low temp'- so that wouldn't be causing the fan to stay on- right? Mwaynew
Thursday, April 12th, 2007 AT 2:57 PM

3 Replies

Tiny
PEPPERMRJ
  • MECHANIC
  • 1,158 POSTS
What brought the ECTS to mind? I doubt if they are related to your current issue. I would double check all electrical connections tho. It is possible something either dod not reconnect properly or something else was disturbed.

You will need to have the trouble codes read. You can try some of the large auto parts stores that do this for free. It might or might not work. Some codes are model specific and can only be read by dealers.

Good luck and let us know. :)
peppermrj
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Thursday, April 12th, 2007 AT 8:43 PM
Tiny
MWAYNEW
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The ECTS is the coolant temp. Sensor, right? One of your recent answers mentioned how a bad one could effect the fuel mixture, effecting the idle. (Forgive my lack of knowlege) Fuel system aside, could a bad sensor cause constant fan operation as well as no fan operation? I'm thinking that it may be an odd coincidence that it failed when it did (if it did). Thanks for your patience. Mwaynew
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Friday, April 13th, 2007 AT 9:12 AM
Tiny
PEPPERMRJ
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Yes. The ECTS is the coolant temp sensor. And they can impact the air/fuel ratio that the computer determines for optimal running conditions. They will also be the guide the computer uses to regulate the cooling fan.

The Old style ECTS that was prone to failure was updated in 2000. I have not heard of any problems with them since then, although anything is possible. I would check the connection and the wiring for sure.

You need to retrieve the codes and let us know specificaly what they are to narrow down the possibilities.

Peppermrj
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Friday, April 13th, 2007 AT 12:48 PM

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