Open loop to often WTF?!
- Thread starter Chris
- Start date
boxer3main
<1.8 liter
interesting.
if it is IACV and idle stays up, could it be responding to fuel being too much, therefore, not an error...it is getting fuel air right.
IACV used to be "air bypass", unless there is still a function for this on your sube seperately?
it is a strong weather lately, my pcs reveal it. I wouldn't be surprised if problem goes away.
if it is IACV and idle stays up, could it be responding to fuel being too much, therefore, not an error...it is getting fuel air right.
IACV used to be "air bypass", unless there is still a function for this on your sube seperately?
it is a strong weather lately, my pcs reveal it. I wouldn't be surprised if problem goes away.
inski
New member
Def sounds like a leak. Whether it be inside the throttle body, or vacuum leak, or misinterpretation of the MAF its getting more air than its measuring.
*make sure your MAF is fully plumbed correctly. Everything needs to be attached, you need a enclosed straight shot from MAF to the engine. After air exits the MAF its all metered and accounted for. More or less will mess crap up.
*Remove throttle body, clean throttle body inside and out with throttle body cleaner. Make sure you clean out the IAC passages and the little valve motor area. Reinstall.
Drive it again. if its still not fixed look for vacuum leaks.
*make sure your MAF is fully plumbed correctly. Everything needs to be attached, you need a enclosed straight shot from MAF to the engine. After air exits the MAF its all metered and accounted for. More or less will mess crap up.
*Remove throttle body, clean throttle body inside and out with throttle body cleaner. Make sure you clean out the IAC passages and the little valve motor area. Reinstall.
Drive it again. if its still not fixed look for vacuum leaks.
inski
New member
Yeah, weird. I'm gonna have to keep this in my bag of tricks. Thanks!
but I really believe possibly something else might be happening intermittently, as you said, "a glitch." But, the glitch might have been caused by a bad ground or short to power or something funky that isn't triggering the fit at this time. The symptoms sounded like a vacuum leak or stuck idle valve.
Hopefully for you this is the end of any issues. Please post up any new episodes of irregularity.
but I really believe possibly something else might be happening intermittently, as you said, "a glitch." But, the glitch might have been caused by a bad ground or short to power or something funky that isn't triggering the fit at this time. The symptoms sounded like a vacuum leak or stuck idle valve.
Hopefully for you this is the end of any issues. Please post up any new episodes of irregularity.
Chris
YARRR SUBY MONSTER!!
Yea, I will. I'm kind of upset I didn't have to do anything besides reset the computer to fix it. It leaves me with an unknown as to what was actually going on.
First I thought valve sticking open, but the scangauge was saying the loop was open, if the valve was stuck open, wouldn't the computer be reporting it as close, and throwing a CEL because it was actually open?
First I thought valve sticking open, but the scangauge was saying the loop was open, if the valve was stuck open, wouldn't the computer be reporting it as close, and throwing a CEL because it was actually open?
Chris
YARRR SUBY MONSTER!!
So it is intermittently back. When warmed up it idles between 825 and 850 rpms, and the computer keeps wanting to open the loop when it doesn't need to.
But then it will randomly stop. The idle part does kinda sound like a vacuum leak though. I should do a thorough check of the intake to see if I have any leaks. And maybe pull off the IACV and clean it? I'll read the service manual/look online to see how to do that.
But then it will randomly stop. The idle part does kinda sound like a vacuum leak though. I should do a thorough check of the intake to see if I have any leaks. And maybe pull off the IACV and clean it? I'll read the service manual/look online to see how to do that.
inski
New member
If it were my car...
Listen for hissing sounds. I'd hit all vacuum leak suspect spots with brake clean. A small quirt at the base of the intake in several spots. Hit the base of the throttle body. Hit the brake booster hose. Hit the PCV hoses. Hit the fuel reg hoses, hit every hose plugged directly to the intake. Any vacuum leak will make the engine bog or almost die because of the sudden unmeasured volatile such as brake clean. Its ok. Let it bog and sputter. Shoot some brake clean on it again to confirm your findings.
Then I'd pull the entire throttle body off. Open the blade and hold it open with a screw driver handle of something. Clean the bajeezus out of it with brake clean or throttle body cleaner and a toothbrush. Your idle motor is the largest doodad on the side of throttle body. Pop it off, spray, scrub with toothbrush. Let all the chemicals dry. Slap it all back together. Run it.
Listen for hissing sounds. I'd hit all vacuum leak suspect spots with brake clean. A small quirt at the base of the intake in several spots. Hit the base of the throttle body. Hit the brake booster hose. Hit the PCV hoses. Hit the fuel reg hoses, hit every hose plugged directly to the intake. Any vacuum leak will make the engine bog or almost die because of the sudden unmeasured volatile such as brake clean. Its ok. Let it bog and sputter. Shoot some brake clean on it again to confirm your findings.
Then I'd pull the entire throttle body off. Open the blade and hold it open with a screw driver handle of something. Clean the bajeezus out of it with brake clean or throttle body cleaner and a toothbrush. Your idle motor is the largest doodad on the side of throttle body. Pop it off, spray, scrub with toothbrush. Let all the chemicals dry. Slap it all back together. Run it.
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