Getting really annoyed at my idle problem...
#11
05-07-2009 | 02:04 PM
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From: Allen Tx
Adjust the stop screw so the throttle plate just closes fully, but does not slam against the sides of the throttle body.
Then, be sure to calibrate your TPS before doing anything else. You can also test at the center wire of the TPS under the hood. Like Ron said, turn the key on to power up the ECU and sensors, but do not start the engine.
With the IACV disconnected, rpm should decrease but the engine should not quite stall. While fully warmed up, adjust the air screw (not the stop screw) to get about 400 rpm with the IACV wire disconnected. In other words barely running but not stalling.
If you still have stalling issues you could try opening the air screw a little more. You just can't have it go over 750 rpm on air from the screw alone, as the ECU would not be able to slow it down and you will get a CEL.
Then, be sure to calibrate your TPS before doing anything else. You can also test at the center wire of the TPS under the hood. Like Ron said, turn the key on to power up the ECU and sensors, but do not start the engine.
With the IACV disconnected, rpm should decrease but the engine should not quite stall. While fully warmed up, adjust the air screw (not the stop screw) to get about 400 rpm with the IACV wire disconnected. In other words barely running but not stalling.
If you still have stalling issues you could try opening the air screw a little more. You just can't have it go over 750 rpm on air from the screw alone, as the ECU would not be able to slow it down and you will get a CEL.
#13
05-07-2009 | 03:18 PM
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From: Allen Tx
Okay, just stopped at autozone to get pcv valve and my car was doing the typical problem as described. I unplugged the IACV while it was running and it instantly died. Tried this 3x over again and same result... deal is though when it idles its almost dead anyway, if the idles reduces does that not mean that the rpms will drop as well thus killing the motor? Is this a reliable test? Please let me know, when the car cools enough to touch I will get track the pcv down and replace, then check the tps sensor, and install throttle stop...
Tested TPS- .665 -4.665.... not the problem. I have the pcv valve to change now...we shall see
Tested TPS- .665 -4.665.... not the problem. I have the pcv valve to change now...we shall see
Last edited by chasemclemore; 05-07-2009 at 05:18 PM.
#14
05-07-2009 | 05:58 PM
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From: Allen Tx
please help found pcv and wondered if I need to take the oil filter off to get to it... I am curious because I just changed oil and dont want to hurt anything... is it going to mess it up if I take the filter off to work on this and immediately put it back on?
#17
09-25-2009 | 12:16 PM
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From: Allen Tx
No problem, they throttle plate in the inside of the throttle body was completely shutting causing the motor to fully choke at idle, clean it up with some throttle body cleaner and maybe that will free it, HOWEVER DO NOT MESS WITH THE SCREW that adjusts it, you will NEVER get it back right, I had to get a used one... then clean your IACV and this should solve your problem, let me know if I can help anymore!
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