High idle on 4th gen V8. Any fixes?

I'm pretty sure the keys are:

-Lift off gas and on to brake in a short amount of time

-Very rapid depression of brake to max of 50-75% of full engagement

The situation it happens to me in is I'll see the cars ahead of the one I'm behind begin to slow rapidly, so I'll lift off the gas and on to the brake very quickly but only engage the brakes what feels to be about 50% (I do this to slow a little but have my foot there just in case I need to slow at a greater rate), then its time to find out if the seatbelts work (they do).
 
I believe the idle remains high so that the engine can get to operating temperature faster. This will get the engine controls into Closed Loop faster and hence reduce the emissions. At least that
 
With EFI there is no chock, the system just dumps more fuel and the idle needs to be higher to stay running.

Koz
 
Shift into neutral at stoplights

Having driven manual transmission vehicles for so many years, I found it irritating to have the 4Runner want to creep forward so much at stoplights. It is worse when the engine is cold and the idle is high. Not a big deal, but a little irritating, especially through a long light. My answer is to shift into neutral at the lights if I'll be there a while (light just turned red or I know it's a really long cycle). This allows the engine to rev up a little and warm up faster, but no load on my foot.

Any opinions on this strategy? I know it causes me to do additional shifts of the transmission, though not a lot.

As for Brake Assist, I've had it activate a couple of times. It wasn't necessary to prevent me from hitting something but if circumstances were different it might have. I think the main benefit is for people who might not hit the pedal hard enough in a panic stop to activate the ABS fully. Maybe some drawbacks, but overall I think it's a good idea. Seems like when it activates it goes for a maximum effort stop until you let off the pedal quite a bit.
 
I was able to trigger the brake assist feature today, but it required a fairly heavy stomp on the brake pedal. The sensitivity or ease of engagement of this feature seemed OK to me.

What I noticed was not so much the extra braking force, but the delayed release. Weird...
 
fast idle

A guy asked how to fix a high idle issue which is why I came to this post and no one helps. Then it is highjacked by talk about brake assist which is not the issue.
You could have given help but instead you have given so much more.
 
Last edited:
weeum said:
A guy asked how to fix a high idle issue which is why I came to this post and no one helps. Then it is highjacked by talk about brake assist which is not the issue.
You could have given help but instead you have given so much more.
Click to expand...

this thread is 12 years old...
 
weeum said:
A guy asked how to fix a high idle issue which is why I came to this post and no one helps. Then it is highjacked by talk about brake assist which is not the issue.
You could have given help but instead you have given so much more.
Click to expand...

This topic as mentioned is 12 years old, and also the OP hasn't been on these forums since 2010, I'm guessing he sold his T4R.

You criticize that no one helped this guy with his issue, I'm just guessing here it's because no one had an answer that would solved his issue but they at least tried with what they thought may help, so do you have any knowledge on the high idle to help others that may need the same advice/help?

If not then it was pointlees for you to post criticizing others who did try, you haven't helped any more than all who have posted before you but at least they tried.

That being said I don't know the answer either, but it may help to clean the MAF sensor, since it senses the amount of air to fuel mixture and thusly reduce the amount of fuel being injected, or maybe not.
 
Last edited:
You must log in or register to reply here.

Members online

Total: 598 (members: 3, guests: 595)

Forum statistics

Threads
278,316
Messages
3,554,113
Members
248,016
Latest member
Advally Service

Share this page

Trending content

Back
Top