mdavisii

Question for everyone,

Lately I have noticed that after my car sits for about 10-15 minutes and I go to start it, the idle will immediately go down to 500 RPMs for a few seconds, and then it will gradually increase up to 7500 RPMs where it would normally idle when engine is warm. It did not do this in the past. I used to be able to start the engine (warm) and it would rev up to about 1500 RPMs and then gradually decrease down to 700. Is anyone else experiencing this? It almost seems like it wants to stall when it gets down to that 500 RPM range.

I have a 99 TL with 95,000 miles on it. I may need to change my plugs, but I am wondering if it could be something else.

Phatty 2K 3.2TL

Wow I don't know what it is about this board but EVERYTIME I have a problem and come to post on it, someone has beaten me to it! I JUST developed this problem intermitantly -- I have a 2000 TL with 40,000 miles on it. I thought perhaps it was b/c during the week my car is not driven (I have a company car too). So EVERYONE, any ideas on what this problem is?

ResidualFreedom

That's a freakin' high idle!! just kiddin' we all know you meant 750 rpms.

I have had this happening to me in the last few months, I have also heard the problem mentioned before butI forget what the solution was. I have the same problem right now so I would love to hear the answer...

not sure if "carbon Build Up" was the problem here, any help?

mdavisii

Oops! Where did that 7500 come from Yes you are correct, I did mean to say 750. Anyway, it's nice to know that I am not the only one experiencing this.

darkfox12

i have the same problem too, ill jus be idlein, and then itll drop down to 500 then go back up to 750, up and down like that, I dont know whats up, is this bad?!?!

soccerbenk

well there was a recall for our car on this issue basically all it is is u bring it to ur dealern they clean out ur throttle body, they say this will fix it. i have the same problem and hafta bring it in soon. u can look for the recall on the acura site, if u cant find it ill go look it up later

Phatty 2K 3.2TL

I don't see the recall notice for this on any of the sites. Is this a problem that could fix itself in anyway? Getting to my dealer is SUCHHHH a pain! Anymore info is greatly appreciated.

Thanks,
Noam

Tosh

Dirty fuel injectors can contribute to a hiccup in the idle speed every now and then, but the likely cause of ANY idle speed irregularity is a dirty or defective IAC valve. This seems to be such a widely occurring problem on our cars that it deserves its own "sticky." Unfortunately, I don't know exactly the proper procedure for cleaning it, but perhaps someone on here knows?

howardc888

I have exactly the same problem on my 2000 tl. The problem started at around 45000 miles but it only happened once in a blue moon. Now that my car is at 60000+ miles it is showing more often, especially during winter time. There were times when I cold-started the engine, the rpm will go to 2000 or something close to 3000 - yeah, it was kind of scary. I have spent a lot of time on the forum and it seems like a lot of people are having the same problem and most people got them fixed by replacing the IAC valve. I talked to my mechanics just a few days ago and it told me there is nothing to worry about and it is normal. Since I am in the Sunny California and I don't see this problem that much during summer time, I am just going to leave it along. It was kind of annoying when you are at the stop light and the rmp goes up and down, and the car shakes a bit. I found it strange but if you keep the car at 2nd gear and rev all the way to 6000 rmp while driving, it will not happen again at the next stop light.

goldendragon576

It's never happened to me, but I'm going to have to pay more attention now.

ResidualFreedom

would I still "qualify" for this recall on a '99 TL with 130k - 75000miles??

If it is a recall then it shouldn't matter about the kms on the car, right?

A warranty yes, but not a recall, I think?

mdavisii

Where is the IAC valve located on our car? I might just buy the part and replace it myself to see if it helps (provided the part isn't too expensive). From what I understand it is only connected by two bolts and a harness.

Phatty 2K 3.2TL

Anyone know anything?

VeiLsTyleZ

aww dude...i have the exact same problem. ANYBODY knows whats going on?

samkws

i have such problesm lately too~

it used to happened with me last winter in heavy snow storm when i rolling 20km/h for one hr!!!

and i found similar problems lately too, i guess it's the battery is low

what i did was put to 1st, then drive up to 3-4k rpm for about 30 sec, then the problem is gone, to get the battery charged up

but dont do that in netural, it doesn't work as gd as doing in 1st gear

aclura

IACV or EACV is located just before and under the throttle body in the intake. It has a small hole into the throttle body throat that you can cover with your finger and see if it corrects the condition. It has water lines connected to it that senses the engine temperature. This is a common problem for older Honda's, and they rev from idle to 2000 rpm.

bkzjimmy

i think everyone has this problem........i think its gotta be something with the fuel injector

PhYrE

99TL with 120Kkms on it. Same problem.
I'll start it up and it'll feel like it is about to stall for a second, and then it picks up to a normal idle after 15 seconds or so.
AND if I put it into gear when it's cold, I normally don't have a problem (though it does bring the idle speed down), but if the wheels are turned (backing out of a parking spot) and has to try that little bit harder, it'll do it again... a rough rumble as I said almost like it's on the brink of stalling.

Though we do all know that the idle for the car is about 650 right and not 750?

pimpravi

its from the gas you use... ever consider that?

PhYrE

You mean dirty (read: Shell) gas buildup?

Normally Sunoco '94, sometimes Esso '92.

mdavisii

Funny this thread has resurfaced. I just called my local dealership for this exact same issue on yesterday. It will idle perfectly when I go to start the engine in the mornings (revs up to about 1700 RPMs or so, and then slowly decrease as the engine temperature warms up). After the engine is warm and I go to start it the idle speed will immediately drop to like 500RPMs or so (like it wants to stall), and after about 10-15 sec it will gradually go back up to the 750 RPM mark. I thought maybe it was the IAC valve, but after installing a new one the issue was the same. My idle is not bad while the engine is running, it is bad on the initial warm start. If anyone can solve this mystery I would love to hear about it. The dealer told me that my EGR ports may be getting somewhat clogged. They indicated that these in a sense operate like a valve on initial startup (although I didn't quite follow him).

My only other thought was the fuel pressure regulator, but when I inquired about that the advisor told me that was for the transmission (which really didn't make sense to me at all).

Oh, as for the fuel, I have only used BP Amoco Ultimate for the 15 months I have owned this vehicle. They are supposed to be one of the best out there, so I would not think that the gas would play a role in this.