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Old 09-07-2009, 11:08 AM   #1
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HIGH idle, any idea what sensor???

well I have fought my high idle problem all year. and its getting old. thought it was fixed once but it came back. any ideas would be appreciated.

whats happening

start up cold or hot and it idles up to 1500 then ses comes on and then goes up to 1700 rpm. if you rev it up then it only goes down to 1800 and will not come down.

when driving the ses goes on and off sometimes but idle does not change. most of the time one I drive it and stop it will stay around 1200 rpms.

when I WOT or get into it the ses goes off but come back on very shortly after.

I have warmed up the car and then followed the steps on have to set my idle but it didn't help. I have replace my iac and checked my TPS and its ok.

my thoughts are possible a bad 02 sensor making it idle off. been told you loose some low end with a bad 02. By the way I can barely chirp 2cnd gear. don't think that is right. but 1st wil spin good and the car seems to pull pretty good through 3rd and 4th.

my dad thinks its something else. maybe the temp sensor sending bad info so it idles high trying to warm up


any ideas??? throw any thing at me you may have
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Old 09-07-2009, 01:37 PM   #2
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just went out and jacked up the car and took off the 02's. they are newer Bosch ones. and I pulled two spark plugs and they are a tan/golden color. sounds to like the 02's are good and fuel mixture is ok.

out of ideas on what to check and how to check it.

what would the maf do if it was not programmed right???
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Old 09-20-2009, 08:15 AM   #3
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up date.

well I found someone to scan the ses for free(on a low budget). code 22 came up which it tps low voltage. I check it before and it was set at .056 and would go past 4 at wot. With the scanner hooked up it showed that its going back and forth between .02 and .04. sound low on the scanner

how can I fix it. bought a new tps before and tried it but it didn't help so I returned it. though I never checked to see volt settings on the new one. Do I need a new one or could there be a bigger problem??


anyone??
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Old 09-20-2009, 11:32 AM   #4
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Have you taken off the air intake at the throttle body and visually confirmed the throttle closes all the way when the engine is off?
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Old 09-20-2009, 01:52 PM   #5
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Disregard what I said before. Check ALL the wiring to the TPS sensor for cuts/nicks/breaks and if there are none, replace the TPS sensor and clear all codes.
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Old 09-20-2009, 04:57 PM   #6
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going to look at wires tomarrow. replaced sensor before and it didn't do anything different so it hopfully is a wire .

thinking if it reads good at the sensor it must be one of the two wires going back to the pcm. must be losing signal on the trip back. hard to believe that could raise my idle and throw it all off. I hope that is the cause of all my problems.

yes the throttle is closed all the way. had it a part to many times to think of.
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Old 09-21-2009, 02:39 AM   #7
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High idle is usually a symptom of a vacuum leak..
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Old 09-23-2009, 09:19 PM   #8
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Fixed

well I checked the wires on the TPS and found the ground was weak. Ran a new ground wire and started the car and the problem went away. car idles down just like it should. much funner to drive now. It has more power through the gears too.
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Old 09-23-2009, 10:04 PM   #9
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Glad you figured it out.
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Old 04-19-2014, 03:17 PM   #10
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Problem fixed???

Hi!
You said you ran a new ground and that fixed the problem. Did you replace the ground engine strap or the ground from the throttle body sensor to the PCM or???
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Old 04-19-2014, 03:31 PM   #11
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Quote:
Originally Posted by boulis94 View Post
Fixed

well I checked the wires on the TPS and found the ground was weak. Ran a new ground wire and started the car and the problem went away. car idles down just like it should. much funner to drive now. It has more power through the gears too.

Quote:
Originally Posted by vegastourstore View Post
Hi!
You said you ran a new ground and that fixed the problem. Did you replace the ground engine strap or the ground from the throttle body sensor to the PCM or???
Wow, this is an old thread! TPS= throttle position sensor. He just ran a new ground for the sensor itself.
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