High idle issue and intermittent shifting cause IAC, TPS?

Tiny
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What is the exact code number its setting now?

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Friday, September 28th, 2012 AT 1:59 AM
Tiny
DLVAUGHN1963
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Will relay later. Also disconnecting IAC DOES NOT change idle issue

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Friday, September 28th, 2012 AT 3:05 AM
Tiny
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If you unplug it it cant change the idle keep me posted.

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Friday, September 28th, 2012 AT 3:19 AM
Tiny
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But how long does it take the computer to respond to the idle setting's return to normal?

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Friday, September 28th, 2012 AT 4:00 AM
Tiny
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Shouldnt take that long.

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Friday, September 28th, 2012 AT 4:41 AM
Tiny
DLVAUGHN1963
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I'm looking for a good diagram for the vacuum lines and don't see one. Besides the one on the hood of the car, is there another one?

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Friday, September 28th, 2012 AT 10:23 AM
Tiny
DLVAUGHN1963
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More info.
When I check the idle with the car being cold the idle is ok, just rumbling, however when the car temp heats up, it goes high. I can't find a leak in the vacuum system unless the leak is at the vac line that runs from the solenoid to the canister, and the canister is in the back of the car. I did a ohms/resistance check of the IAC valve and it checks good unless the valve is just plain worn out.

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Friday, September 28th, 2012 AT 12:58 PM
Tiny
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See if the canister purge solenoid is stuck open?

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Friday, September 28th, 2012 AT 3:50 PM
Tiny
DLVAUGHN1963
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One other has me wonder bout the solenoid, fuel gage doing weird stuff and heavy fuel fumes. Can you tell me exactly how many hoses are connected to the solenoid?

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Friday, September 28th, 2012 AT 5:44 PM
Tiny
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There should be the vaccum source from the engine and another hose that goes back to the canister.

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Friday, September 28th, 2012 AT 7:36 PM
Tiny
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I will look again at the purge solenoid. I remember the connection but not sure how many hoses I saw. More to come

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Friday, September 28th, 2012 AT 8:09 PM
Tiny
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Alright keep me posted.

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Friday, September 28th, 2012 AT 8:58 PM
Tiny
DLVAUGHN1963
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After looking at a photo of the EVAP purge valve/control solenoid, I'm seriously considering this specific area to be my problem and here's why. When I first replaced the hose from the PCV to the solenoid, the idle issue surged then immediately went to normal. This was fine for about half a day, then surged back high. I think I also told you I had replaced the PCV on this same day. I do hear hissing like from a vacuum leak but the place where this valve/solenoid is located means I need to use a mirror to see and repair/replace. According to the manual, and internet searches, there are two hose connectors. Which one goes where? I'm not sure if I have seen the hose for the other connector, and I will verify that today. All I know is this car eats gas now as if I have a bank account just to feed it (lol). Anyway I will let you know what I find out.

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Monday, October 1st, 2012 AT 9:17 AM
Tiny
DLVAUGHN1963
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Update.
Here's what I did this morning.
1. Checked coolant and topped off
2. Checked the ecu fuse was good.
3. Started engine, idle still high so
I disconnected PVC line checked for vacuum, was good
Disconnected fuel pressure regulator line, vac good there
Checked booster vacuum, good
visually checked the vacuum lines on Purge valve solenoid, all connections good, and disconnected power to the valve.
4. Shut engine off. At this time the only connector not connected in the engine compartment was the purge valve solenoid.
5. Started engine, still high, connected solenoid valve plug, let run for about 1 minute, then shut off engine.
6. Restarted engine and idle returned to normal. Run A/C, Shifted transmission from park through selection ranges, still normal idle, back shift back to park, and idle still normal.
My synopsis is that when I had the bad PCV line to the solenoid, after a bit of time the solenoid stuck in the open position because of vacuum failure (would that be a correct guess?) By resetting the solenoid, the operation of the part went back to normal operations. What I thought was a vacuum leak was not, I wanted to find out if there was an issue of vacuum and the Evap service line did not give me any indication of a leak there either even with the engine running. I will let you know if anything else happens, but for now all seems well.

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Monday, October 1st, 2012 AT 12:31 PM
Tiny
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If the canister purge solenoind is stuck open it can cause high idles dieing etc. The vacuum leak is just happening in the gas tank. When you have the idle see if the valve is stuck open.

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Monday, October 1st, 2012 AT 4:12 PM
Tiny
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That also would explain why my gas level fluctuated as much as it did. The idle did sneak back up. I purchased a new purge solenoid. Will change it next.

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Monday, October 1st, 2012 AT 4:40 PM
Tiny
DLVAUGHN1963
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I did get the purge solenoid changed. Idle is good. I did hear hissing near the tank, not noticing this before because I've gotten like really picky about the noises my car makes lol. Is the hissing sound normal?

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Monday, October 1st, 2012 AT 5:02 PM
Tiny
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When do you hear the noise after tuning the engine off?Where is the noise coming from?

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Monday, October 1st, 2012 AT 5:25 PM
Tiny
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When the car is running.

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+1
Monday, October 1st, 2012 AT 7:09 PM
Tiny
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So is this after the car has warmed up and this was after you changed the solenoid?

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Monday, October 1st, 2012 AT 8:15 PM

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