1995 Saturn SL2 95 Saturn SL2 high idle

1995 SATURN SL2
160,000 MILES • 4 CYL • FWD • MANUAL
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95SATURNSL2
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Hey guys,
I've read a lot of posts about this problem, and have been chasing it around my car looking for a solution.
I have a 1995 Saturn SL2 with an intermittently high idle. It usually happens when it's hot, but lately it happens even more randomly. My car has 160,000 miles, a manual transmission, and I've replaced the air intake with a cold-air intake, replaced the fuel injectors, just replaced the IAC, cleaned the throttle body, changed the fuel filter, and did a small tune up (spark plugs, plug wires, changed oil). I can't seem to figure out what my problem is. Oh, I also changed the EGR gasket, the old one was in pretty bad shape. Any help would be greatly appreciated, if you guys need any more info just ask. :)
Sep 29, 2010 at 5:57 PM
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SATURNTECH9
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What code's do you have?Also how high is the idle when it idle's high?
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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Thanks for the quick response. sometimes a code flashes, but I can never catch it in time, and I haven't seen one in 3 weeks or so. Usually the idle raises up to 2 or 2.2, but it also never seems to want to drop, it'll stick at 1.3-1.5. so its usually somewhere between 1.3-2.5 at the most. After I replaced the IAC today and started it, it shot up to 3 then calmed down. Also. I'm not sure if this is relevant, but it seems to run great with less fuel. (almost empty). and also I took off the EGR, it seemed a little sticky. I hit it with some carb cleaner and a coat hanger, I'll let you know how it runs when I put it back on tomorrow.
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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Alright let me know how it idle's a sticking egr cause's stalling not high idle's.
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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my egr was pretty darn stuck, it stayed in about half the time i pushed it, i went to town and now it doesnt stick at all. it seemed to act a lot better, but the idle seemed bouncy. i would push in the clutch, and it would drop to 1, then bounce +/- .2 around 3 times up and down. it likes to stick around 1.2 or 1.3 lately. eventually i got it to sit at 1 after running her around a little, but it still wavers +/- .1 you can feel it and hear it more than the tach shows, it seems. the cars kinda loud, i got it with a fart can on it.
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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oh, also replaced the ECTS a little while ago, i had a cracked resin tipped, replaced it with a brass tipped when it started overheating at idle. it was causing the fan to not run. figured i'd give a full history.
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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I have never had any luck cleaning those egr valve's they stick at the opening and they stick open which mean's the pintle or the shaft stick's and cleaning that is impossible.Your best bet would be to change it with a new one.I posted how to retrive code's let me know what code's you have.


https://www.2carpros.com/forum/automotive_pictures/416332_1993_SW2_code_retrival_part1_2.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1993_SW2_code_retrival_part2_3.jpg

Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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yeah, i keep a paper clip in my car for this very reason, lol. but the engine light usually goes off after 30 seconds or so, i can never seem to catch it. and I haven't seen one in weeks.
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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There will still be a code stored find out what it is.
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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just kept flashing 12.
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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They all have code 12 that's normal so your still getting the high idle?
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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new news!
i was going over the bridge, and the check engine light finally came on again. i pulled over and checked it with the paper clip trick, got code 22. is this the tps? the revs would drop and bounce, down to 400, then when the light went off, it would resume high revving at idle.
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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https://www.2carpros.com/forum/automotive_pictures/416332_1995_sl2_code_22_part1_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1995_sl2_code_22_part2_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1995_sl2_code_22_part3_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1995_sl2_code_22_part4_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1995_sl2_code_22_part5_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1995_sl2_code_22_part6_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1995_sl2_code_22_part7_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1995_sl2_code_22_part8_1.jpg

Code 22 is tps sensor it is also 2nd gear ratio error but sound's like you your looking at the tps code.I posted a trouble tree for it.
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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ugh, new problem, much more important. i drove to work and when i tried to leave, my car 1/4 cranked, then the lights and everything shut off. no more crank, no nothing. we tried to jump it and it did it again. it used to be that i could slam the hood a few times and it would run, that didnt work either. we tried jumping it with the jumper on the red terminal (took the terminal off the battery) to see if it would do anything, nothing happened. what could it be??
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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First thing i would do is have the battery charged and tested.Then make sure the battery cable's are clean and tight.Then if it start's test the alternator.You could have a bad alternator or bad battery or both.
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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thanks for the quick response. who would be able to charge the battery? and do you have to take your alternator off to have it tested?
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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If you take it out a auto part's store like auto zone should be able to charge and test it.Also if you can get the car started you can test the alternator in the car.Do you have a multimeter?
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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no, i dont. i might be able to get one thursday, when i get paid.
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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Alright let me know what you find with the battery if the alternator is bad you won't be able to drive it.
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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well, i managed to fix the high idle for the most part, there were some faulty wire spices behind the TPS (doh!) and the start problem was just a ot of buildup on the terminal (couldn't see it at night, didn't have a flashlight.) now i've got some orange, frothy coolant. i;ve mostly just been filling it up with water because i've got a slow leak. then one day when i got off the highway i went to check it. my coolant was a little low and i had orange frothy coolant! someone told me it may be a symptom of a blown head gasket, i'm a little worried. are there any tests for this? and what else might it be? i haven't noticed any performance problems yet at all, in fact i thought it had been driving much smoother than normal.
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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You can rent a blown head gasket tester at auto zone auto part's they just make you buy the chemical for the tester.I have never seen one turn the coolant orange though.Did you ever put any gm dex cool in your car because that is orange?Is your car overheating or any big cloud of steam coming out of the tail pipe?
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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no,i've just been using water since i have a leak. somebody said it smelled and looked like stop-leak. and it definitely doesn't smell like oil. but why would it happen all of a sudden like this?
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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When thing's go bad the don't always give warning they can just go suddenly.There isn't many thing's that can really cause the orange in the radiator especially if you only have water in it.Have you tried draining it and flushing it?Putting fresh coolant in the system.I would also pressure test the system and see where the coolant is leaking.Is there any kind of steam coming from the tail pipe?
Jan 22, 2019 at 11:35 AM
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95SATURNSL2
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i'm planning on draining / flushing when i have time. should be the next few days. i don't have any tools to flush the system, but i'm sure i can go do it somewhere. would autozone or discount auto do it / how much would it be? i haven't noticed any steam from the tailpipe, but i'll check again. would that happen when the car is hotter or all the time?
Jan 22, 2019 at 11:35 AM
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SATURNTECH9
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Auto part's store's don't do coolant flushes just buy a chemical flush and follow the direction's on the bottle.All you need for tool's is a 3/8 drive 10mm socket a 4 inch extension a 3/8 drive ratchet and a pair of needle nose pliers.A head gasket usually blows if you run the engine too hot too long.
Jan 22, 2019 at 11:35 AM