High Idle Issue in NA6
I started having this issue a few weeks ago but it's gotten more frequent. Upon first startup, everything is fine, but I've noticed it happen most often after I've had to drive somewhere and turn the engine off. When I get back to my car, it will start idling high, like 1700. Only when in neutral or with the clutch in. When I go into first, it lowers slightly and then goes through the numbers like normal. It has happened a few times where idle is normal for a bit, then will randomly go up when I pull up to a stop light or something. I once sat with the car idling high trying to figure out the problem, and after ten minutes or so, it suddenly went back to normal. No other issues with idle, acceleration is fine, car runs fine, this only happens in neutral or with clutch applied and only when the car has been warmed up. Today, after about a 45 minute lunch, I started and idle was lower than 1700, but slowly creeped up to 1700 over the course of a minute or so.
|
Maybe the Idle Air Control valve?
|
Could be the cold start valve. Google it. You test it by pulling it off and putting it in hot water.
|
Doesn't sound like the Air Valve at all. It's basically a thermostat and wouldn't really open up like that. It moves forward when the clt gets warmer I can't see it gradually closing and causing the idle to move up like that. I dunno I could be wrong.
its sounds more like a simple vacuum leak, or the actual idle valve not working properly. when you say it's fine in the gears, do you mean you have your foot on the clutch pedal, and change gears? That should have no effect whatsoever. |
Originally Posted by Braineack
(Post 1352421)
Doesn't sound like the Air Valve at all. It's basically a thermostat and wouldn't really open up like that. It moves forward when the clt gets warmer I can't see it gradually closing and causing the idle to move up like that. I dunno I could be wrong.
its sounds more like a simple vacuum leak, or the actual idle valve not working properly. |
Originally Posted by Braineack
(Post 1352421)
Doesn't sound like the Air Valve at all. It's basically a thermostat and wouldn't really open up like that. It moves forward when the clt gets warmer I can't see it gradually closing and causing the idle to move up like that. I dunno I could be wrong.
its sounds more like a simple vacuum leak, or the actual idle valve not working properly. when you say it's fine in the gears, do you mean you have your foot on the clutch pedal, and change gears? That should have no effect whatsoever. |
Originally Posted by Ted75zcar
(Post 1352423)
I totally agree with you. VAC leak and IAC are most likely, the implication of a long time constant in the last line is curiously thermal though.
|
...
let's say you've come to a stop. gear selector is in 2nd and your foot is depressing the clutch. your idle is at 1700, correct? now you move the gear selector to neutral and left off the clutch pedal. your idle is still at 1700, correct? When you shift into gear, your engine bogs because youre not giving the car gas and dunno how to drive a manual gearbox, correct? |
Originally Posted by Braineack
(Post 1352440)
...
let's say you've come to a stop. gear selector is in 2nd and your foot is depressing the clutch. your idle is at 1700, correct? now you move the gear selector to neutral and left off the clutch pedal. your idle is still at 1700, correct? When you shift into gear, your engine bogs because youre not giving the car gas and dunno how to drive a manual gearbox, correct? |
sounds like you have a vacuum leak. are you missing the cap on the rear of the IM?
|
Originally Posted by Braineack
(Post 1352489)
sounds like you have a vacuum leak. are you missing the cap on the rear of the IM?
|
You oughta know by now
|
|
I'll try this, fig. Thank you.
|
All times are GMT -4. The time now is 01:03 PM. |
© 2024 MH Sub I, LLC dba Internet Brands