Saturnhelp

Tiny
SATURNSL2MAN
  • 1999 SATURN SL2
  • 129,000 MILES

Hi, I have a 1999 saturn sl2, when I start it up in the morning I warm it up for about 5min then about 5min off driving it stalls, then takes about 10min to start, it never stalls again through out the day, runs fine, next morning it does the same thing allover again, I change the coolant temp sensor, still doing it, thanks.

Do you
have the same problem?
Yes
No
Tuesday, July 24th, 2012 AT 2:55 AM

48 Replies

Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

Any codes?Almost sounds like a bad crank shaft position sensor. Pretty common on those cars I have seen them do some pretty strange things. When it stalls and wont start see if you have spark?

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 3:00 AM
Tiny
SATURNSL2MAN
  • MEMBER

Thank you, no codes just tuned it up, have good spark, thanks again, donation next time credit card maxed out.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 3:08 AM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

So when it stalls out and wont start you made sure you have a nice blue spark when this haplens?Because a loss of spark is the most likely cause of whats happening.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 3:14 AM
Tiny
SATURNSL2MAN
  • MEMBER

Hellow! I never checked it for spark, but when it does start everthing is normal, it drive fine through out the day, no loss of power, Thanks.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 3:27 AM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

Alright you threw me off you said you had good spark on your last post. So next time it stalls and wont start check for spark. Let me know what you find.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 3:31 AM
Tiny
SATURNSL2MAN
  • MEMBER

Ok thanks I will do that, one more thing how do I check for spark?

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 3:39 AM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

Its easy on that car all you have to do is pop off two spark plug wires that are side by side on the coil. Have someone crank the car while you watch for a nice blue spark jumping from coil tower to coil tower. If there is no spark then your down to a ignition control module or a crank sensor. The ignition control modules are expensive on those cars and dont fail often. The crank sensors fail pretty common on those cars and are cheap. You can test the crank shaft sensor when there failing with a multimeter. It should read around 800 ohms when they fail they read as a open.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 3:50 AM
Tiny
SATURNSL2MAN
  • MEMBER

Hi, I did the test to see if I had spark, I had no spark, one yellowish spark once then nothing after that, now I know what the problem is, thanks a million.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 4:03 PM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

So are you going to test the crank shaft sensor?Or just try replacing it?

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 4:27 PM
Tiny
SATURNSL2MAN
  • MEMBER

I probably just go ahead & replace it, so I can save myself from future headaches.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 4:37 PM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

I wasnt saying drive around with a bad one.I changed mine when I got over 200,000 miles on my 1999 saturn SL2 before it went bad. They usually fail before that I just didnt want to get stranded.I was just asking if you were going to test it before replacing it?Its a pretty cheap guess I wouldnt want to just try a ignition module those are expensive. But I have spare testers of those.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 5:22 PM
Tiny
SATURNSL2MAN
  • MEMBER

I'm going to have my mechanic to check it he has one of those devices, do you think it's possible that it can be both parts? I will have mechanic to check it he's out of town right now.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 5:43 PM
Tiny
SATURNSL2MAN
  • MEMBER

If I have to replace the ignition control module should I replace the coils also?

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 6:28 PM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

I have never seen the module and crank shaft sensor fail at the same time in my many years working for saturn. Its going to be one or the other most likely the crank shaft sensor.I havent replaced many of the modules but lots of the sensors.I dont really belive telling people to try changing parts but in your case it would be cheaper.I would try changing the crank shaft position sensor even if it wasnt the problem you would still be ahead of the game and it would be cheaper then taking it to a shop for diagnoses and repair. The sensor is only 15 plus tax at auto zone you may be able to get cheaper somewhere else. There easy to change you just raise up the car put it on jack stands. There is a connector to unplug and on 10mm bolt holding it in. Then you can pop it out and pop the new one in its most likely the problem. To answer your question should you replace the coils with the module I wouldnt. The coils dont fail that often your mileage is still pretty low.I replace coils etc like that when they fail. The only reason I replaced my crank shaft position sensor was because my miles were getting up there the sensors cheap and it beats getting towed.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 6:51 PM
Tiny
SATURNSL2MAN
  • MEMBER

Thank you! I'm going to have the crank shaft sensor tested before I replace anything, one more thing when I tested the car to see if it had spark the car haven't started since.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 7:11 PM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

Did the spark come back after it cooled down?Did you put the wires back on like they came off?

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 7:33 PM
Tiny
SATURNSL2MAN
  • MEMBER

Still no spark, I tested it when the car was cold that's usually when the problems start, when it warms it's fine, but now it wouldn't start at all, I put the wires back on the way they came off, thanks.

Was this
answer
helpful?
Yes
No
Tuesday, July 24th, 2012 AT 7:44 PM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

Should be easy to find now do you have a multimeter to test the sensor?

Was this
answer
helpful?
Yes
No
Wednesday, July 25th, 2012 AT 1:34 AM
Tiny
SATURNSL2MAN
  • MEMBER

I don't have a multimeter I think my brother has one, if not is there any other way possible I can test it?

Was this
answer
helpful?
Yes
No
Wednesday, July 25th, 2012 AT 1:57 AM
Tiny
SATURNTECH9
  • EXPERT
  • 30,705 POSTS

No you need a multimeter to test the resistance of it. You put it on 2k ohms scale it should read about 800 ohms. When there bad they will usually read as a open no reading.

Was this
answer
helpful?
Yes
No
Please consider a donation if we helped you
Wednesday, July 25th, 2012 AT 2:20 AM

Please login or register to post a reply.

Related Coolant Temperature Sensor CTS Replace/Remove Questions

Recommended articles