and yes these are all the same car on different days...

 

Weird

 

thats what i said....i have no clue whats causing this....

 

Check your cluster ground(s).94

 

So a 16 year old car has an approximate 500 rpm fluctuation on the gauges at approximately the same speed? Doesn't seem too bad really?

 

for someone with o.c.d. heck yeah lol if i knew how to fix it then i would....
the rev-limiter also kicks in at 5000-5500 as well

 

****, I've got OCD but I'll give you props for even noticing it. Are you actually hearing any difference in the motor at those speeds/rpms? Is your rev limiter doing that all the time or just when you first start it up?

 

yeah im noticing a difference in the sound. my first car ever was a 93 civic and i didnt have a tach so most of the time i drive by sound. and the limiter does it at all times

 

any other input?

 

If you hear a sound difference then it is possible your engine is actually running at different RPM's.

Have you done preventative stuff lately?

EGR Ports cleaned
FITV/IACV/TB cleaning
etc

?

 

i changed the egr valve...i cleaned the TB when I changed the motor because i re-used the TB and intake manifold...i dunno what that other stuff is that u listed...i am easily taught on anything mechanical tho so if u dont mind enlightening me on the subject i would greatly appreciate it

 

i'm thinking it could be your ecu simply because you mentioned the rev limiter....thoughts?

is the car in limp mode at all?

 

ive had ppl tell me that limp mode wouldnt allow the rpms to go past 3000rpm and there is no CEL appearing....

 

Well if you figure it out let me know---have a 95 EX and have the same.

Mornings-can run 65 mph at 2,000 rpm's (summer or winter), all the way to work. In the evenings-most of the trip have @ the same rpm's but at the end of the trip I'm running 2,500 at 65 mph. Yes the same-it is the engine rpm's, not the tach.

I'm almost sure it has to due with the fluid-before you go there, I drain and fill the trans with Z1 (soon to be DW1 if you don't know) every 10K. Last reach is that the solenoids are not sealing off and a bit of pressure is bleeding by not allowing full lock-up.

And I have the same OCD about all of this and many other things when it comes to the car....and btw, mine has about 165K more on it than yours.

EDIT: And my stated rpm's are once the converter "locks up". Before that, well we all know they are higher.

 

well it was cruising just fine then yesterday it was running at 2750 @ 70 mph but for the most part it has been running 2250 @ 70 or a lil higher...grr

 

just to cure my curiousity....what are other 5th gen. accords running @ 70 mph?

 

Ok I wanted to follow up on this because I got another ECU and I'm still having the same issues...I read somewhere while digging for similar threads that a guy with identical issues changed his and it fixed it...any clues?