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-   -   NML... Honda over revs.. any carburator guys? (https://mustangboards.com/general-tech-forum/32319-nml-honda-over-revs-any-carburator-guys.html)

JackThe Ripper 09-02-2008 06:42 PM

NML... Honda over revs.. any carburator guys?
 
Hey guys

Just got a question,

on my 84' carb'd civic, i rebuilt the carb last year cause my float sunk. I have new fuel pump, new filters and such.

anyways, this is the issue... sometimes when im driving around and im in 1st or 2nd gear as i hit the throttle the car starts to accellerate as normal, then ill let off the gas, push in the clutch getting ready to shift, and the engine starts to rev for 1-2 seconds. I dont have a tac on the car, but by the sound of it the RPM's jump by at least 1000-1500 then die back down.

does anyone know what might cause this?

JackThe Ripper 09-02-2008 06:43 PM

oh yah, one more thing,

i notice this on the lower RPMS because i can hear it happening, im not sure that this is limited to first or 2nd gear, roadnoise could be drowning it out on the higher gears.

seems like it revvs lightly whenever i push in the clutch

Dodobird223 09-02-2008 07:31 PM

Hahaha, ya wanna know why?


because it's a honda.

Just kidding, my only experience with carbureted cars is making my dad's camaro KEEP RPM's... It always used to die before we tuned it right.... I should say he tuned it right

zigzagg321 09-02-2008 07:39 PM

vacuum leak.

JackThe Ripper 09-02-2008 07:58 PM

was i supposed to keep those hoses then?

lol..

those hoses were so fuggin rotted up, i had to replace most of them. and i had the wrong hose size on some so i used some zip ties to tighten them up. lol. i did end up replacing them though, maybe i just need to go and recheck them all.


any other ideas or is this most likely the culprit?


oh yah, still averaging 39mpg.. lol...

King 09-02-2008 10:49 PM

x2 on the vacuum leak.
What kind if carburetor are you using?

bassman97 09-03-2008 04:58 AM


Originally Posted by JackThe Ripper (Post 349643)
oh yah, still averaging 39mpg.. lol...

And they say EFI is better. I'll take a carb any day, even if it means slightly less low-mid range power.

venom 09-03-2008 06:58 AM

Get some compressed air in the lines with soapy water to see if any are leaking.

bassman97 09-03-2008 07:33 PM

Even easier is to spray the lines w/ carb cleaner while the engine is running. If you have a leak, you'll notice a change in idle. However, this method does get messy and isn't accurate if you have multiple lines right next to each other.

King 09-03-2008 11:14 PM

What kind of carburetor are you using, Jack?

r3dn3ck 09-04-2008 07:46 AM

accelerator pump setting. adjust.

JackThe Ripper 09-04-2008 01:45 PM


Originally Posted by King (Post 349973)
What kind of carburetor are you using, Jack?

uhh whatever is stock.. lol

WNRacing 09-04-2008 02:20 PM


Originally Posted by King (Post 349973)
What kind of carburetor are you using, Jack?

Dual Barrel Holley Double Pumpers.





:rolleyes::rolleyes:





:p

King 09-04-2008 02:46 PM

Like a 4412? I had one that had a vacuum leak once. I ended up plugging the vacuum line with a screw and layering it with duct tape. Wish I still had a picture of that. It was quite the jerry-rigging.

Lazerred6 09-04-2008 02:58 PM


Originally Posted by King (Post 350131)
jerry-rigging.


:eek::eek::eek: Racial slur :eek::eek::eek:

don't say vidieo games never taught me anything


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