high idle?

1998 SATURN SL1
135,000 MILES
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98 STAURN
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Soo would the coolant temp sensor if bad throw the throttle postion sensor code if it bad or is that that sensor cause ive been reading alot on these cars with high idles and most are the coolant temp sensor just wonder cause i picked this car up pretty cheap cause of the high idle
Oct 28, 2013 at 8:13 PM
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SATURNTECH9
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A bad coolant temp sensor can cause a code P0711 but not a tps code. What is the exact code number you have not code descriptions? Also can your scan tool read live data like the tips sensor?
Oct 28, 2013 at 8:24 PM
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98 STAURN
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I took it to auto zone and the tps was the first that popped up but i didnt kno if that would cause idle a 2000 all time
times
Oct 28, 2013 at 8:35 PM
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SATURNTECH9
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It can cause high idle and hard shifting it could be the wires I really doubt its the sensor itself.I have seen very few go bad in all the years I have worked for Saturn.
Oct 28, 2013 at 9:07 PM
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SATURNTECH9
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The exact code number would really help.
Oct 28, 2013 at 9:08 PM
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98 STAURN
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Well its a manual trans ive just been reading alot on these forums about the coolant temp sensor making a high idle but didnt kno cause the tps code was the first code thrown at autozone
Oct 28, 2013 at 9:13 PM
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SATURNTECH9
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The tips miss reading can cause a high idle the best way to diagnosed it is get a scan tool that can read live data like tps etc There like 50 or so on amazon.Or take it to a shop to diagnose.Your going to need tools like a multi meter scan tool that can read live data etc to diagnose it.
Oct 28, 2013 at 9:40 PM
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DAN THEMAN JOHNSON
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catalytic converter also "plugged up" as well can cause high rev upon cold start-up. also the CTS will cause the fan NOT to work. Any replies to this helpful. Thanks. wink - DTM
Jun 5, 2017 at 2:41 PM
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SATURNTECH9
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I have never seen a plugged cat cause a high idle on cold start on Those cars.I have seen a lot plugged cats on Those cars.If the cat was plugged the most notable thing would be the lack of power.
Jun 7, 2017 at 1:07 PM
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DAN THEMAN JOHNSON
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sorry I mis-understood... actually the engine starts WELL when COLD but when HOT its a bit more tempermental plus the cat code shows up (service engine soon light) as well first one to show up then CTS. No TPS code showed up. Thanks...DTM
Jun 7, 2017 at 1:18 PM
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SATURNTECH9
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Ok if your asking a question then you need to start your own question with as many details as possible exact code numbers not code descriptions etc.I would be more then happy to help you out with that.
Jun 7, 2017 at 1:21 PM
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DAN THEMAN JOHNSON
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apologies...I figured out THE problem. Thanks. CAT is PLUGGED.
Jun 7, 2017 at 1:29 PM
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SATURNTECH9
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That's ok thank you for using 2carpros
Jun 7, 2017 at 1:30 PM
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DAN THEMAN JOHNSON
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you are welcome and NO... THANK YOU for this site. THIS IS what the internet is intended to be used for. wish we could solve all our nations problems by Googling. lol...
Jun 7, 2017 at 1:33 PM
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SATURNTECH9
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Please tell all your friends about our site iam the factory trained saturn tech on this site.If you have a question just start the question by saying this one is for Saturntech9.
Jun 7, 2017 at 1:35 PM
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DAN THEMAN JOHNSON
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Okay Kewl man, sounds awesome!!... I will say that my girlfriends car (98) has over 200K on it... ugh... needs some tlc indeed.
Jun 7, 2017 at 2:01 PM
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SATURNTECH9
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My 1999 saturn sl2 has 338,000 miles on it.
Jun 7, 2017 at 6:13 PM
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DAN THEMAN JOHNSON
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Wow...unreal.
Jun 7, 2017 at 6:30 PM
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DAN THEMAN JOHNSON
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Hers has "blow-by" really bad meaning with engine running, take oil cap off it just "blows"/ejects HOT air out of the oil cap hole, plus the pcv valve just rattles like a rattlesnake tail on top middle of the engine. Thats NOT good.
Jun 7, 2017 at 6:37 PM
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STRAILER
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Yep, I would remove all of the spark plugs and do a compression test to see which cylinder is causing the problem.

Here is a guide.

https://www.2carpros.com/articles/how-to-test-engine-compression

Please run this test and get back to us so we can continue helping you.

Cheers, Ken
Jun 10, 2017 at 10:52 AM
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SATURNTECH9
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When the saturn engines do that you have excessive blow by my engine did that till I put a short block in my car and had the head rebuilt.Its really common on Those engines the blow by can her pretty bad.
Jun 10, 2017 at 11:55 AM