omoulton

When my car is warm idle is around 800 RPM. Lately I've notice something when slowing down for a stop. When I depress the clutch and the RPMs drop off, it drops down to about 800 then bounces back up to 1000 - 1100 then drops back down to 800. I don't remember this being the case. Can someone else with a 6 speed check their tach the next time they're driving? I had the car into the dealer for a CEL and my gas milage has fallen a bit since the visit. I wondering if the RPM bounce to 1000-1100 then back down to idle is the result of something done at the dealer while trying to diagnose the CEL. Thanks.

implicit

this thread has a few suggestions:
https://acurazine.com/forums/showthr...ht=vacume+line

rp_guy

uh.. it's vacuum.. but good searching.

GreenMonster

Actually, if you read the whole thread it was replacing the IACV that fixed the problem...

stickgoat

My '03 6-spd does not do this... Can't really think of what would cause rpms to skip like that when you've pushed the clutch in. Odd.

Not much help, I know. Let us know what it ends up being when you find out, though, I'm curious now.

rp_guy

haha

but yeah, try cleaning or replacing the IACV. i cleaned mine and it's been good for ~6 months, but it's acting up again.

so much for honda reliability.. so many niggling problems with the cars..

omoulton

Implicit - Thanks for the link. I don't have any of the symptons described in that thread. The car runs great as it always has.

Stickgoat Thanks for the info. I was pretty sure I would have noticed this before, especially since I owned the car for almost 6 years.

After a service visit to the dealer for what Acura calls a C service a CEL came on the next day. I assumed they didn't secure something. I was several hundred miles away at a customer and could not get to the dealer. On the way home the light went out. Then it came on again and went out, came on & went out.The car was running fine, but thought I should have it checked out. By the time I got to the dealer for the first visit the light had gone out. They pulled the codes and it was a misfire. Important note here. I was overdue to change the filter on my intake and asked if that could be the source of the problem. I was told no. So nothing definite and I was $50 lighter with the advise to bring it back with the light on.

I bought it back when the light came on again. They questioned gasoline. I buy from the same station and have been for several years. Same codes. 2 days of diagnostics, a new injecter on the #4 cylinder and a top end "cleaning" at the recommendation of Acura engineers at corporate. The light was finally out. Walking out $500 lighter this time and with no confidence the problem is solved. I switched gas stations but light came back on. And went out. And came on. And went out.......Also my milage was absolutely sucking. I normally get about 330 - 350 miles before the idiot light comes and now it's lucky if I get to 300.

I live in the north east and the winter has been kinda hard but I finally get a reasonably nice day, so I jack the car and put a clean filter on the intake. Milage has improved, about 300 - 320 before the light comes on. Better but not as good as normal. I figure it's the winter blend gasoline.

One day coming off the highway I'm watching the tach. I depress the clutch, the RPMs hold for a second as they always do then drop down to idle, 800 rpm. Then bounce up to 1000-1100 for a second or two and then back down to idle. I didn't think I would have missed that after 5 1/2 year but figured there was an outside chance. SO thanks for confirming that's not normal.

At least now I can engage the dealer again and ask if they adjusted something during the CEL trouble shooting that could cause that and the mileage problem.

Thanks.