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1999 Saturn SL2 Repair Question


Topics covered: Spark, Sensor, Stalls.
Mileage: 129,000 miles.

Asked on July 24, 2012

Saturnhelp

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.
Avatar Asked by Saturnsl2man

Answer

Replied on July 24, 2012

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?

Tiny Answered by saturntech9 (expert)
23,388 answers provided
Replied on July 24, 2012

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

Tiny Response from Saturnsl2man
1 question asked
Replied on July 24, 2012

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.

Tiny Answered by saturntech9 (expert)
23,388 answers provided

Replied on July 24, 2012

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.

Tiny Response from Saturnsl2man
1 question asked
Replied on July 24, 2012

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.

Tiny Answered by saturntech9 (expert)
23,388 answers provided
Replied on July 24, 2012

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

Tiny Response from Saturnsl2man
1 question asked

Replied on July 24, 2012

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.

Tiny Answered by saturntech9 (expert)
23,388 answers provided
Replied on July 24, 2012

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.

Tiny Response from Saturnsl2man
1 question asked
Replied on July 24, 2012

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

Tiny Answered by saturntech9 (expert)
23,388 answers provided
Replied on July 24, 2012

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

Tiny Response from Saturnsl2man
1 question asked