idle problems

[sman6452]

I have a 1990 accord with 170,000 km and it is standard. I have a weird problem with my idle. When I stop at lights and let the rpm's drop, the idle drops really low and the car fells like it's going to stall. After a few seconds, the idle slowly goes back up to it's normal level.

I though that this might be an egr problem so I cleaned out the intake manifold but the problem persists. Anyone have an idea what the cause might be? I'm thinking it might be a broken vacum line somewhere.

TIA

[princess]

First, welcome to the forum!!

Does this happen at running temp or more often when it's still cold?

The most likely cause is a crusty throttle body. Clean it & let us know.:)

[BenjiBoy650]

My '99 only has 114K and it's doing this too. I was thinking possibly it's a weak battery (mine is getting there) or maybe a restriction in the air flow. I don't know, my air filter is pretty nice lookin and there's no leaves or anything in there though. I do have that sticky throttle body so princess might be right.

[sman6452]

Thanks for the quick reply princess. I'll try it this weekend. My dad's 99 integra with 100,000 km is also having this problem so it might be the same cause.

[princess]

possibly, it's pretty common. Some years/models are a bit more prone than others.

[BenjiBoy650]

In my case, the sticky throttle body is only when cold, but the shaky throttle is only when warm. It could also be a A/F thing, that's what it was on my dads '86 300E but then that's a completely different car too.

[sman6452]

I cleaned out the throttle body with some throttle body cleaner and it fixed the problem. It even worked on the 99 integra.

[princess]

:up:

Yea!