RPM Question

Jason924R

New Member
Joined
Aug 1, 2005
Location
Boone, NC
Sometimes while driving and keeping steady pressure on the pedal, my RPMs will fluxuate.

Anyone know some causes of this issue?

Anything to do with the PCV valve?

Any info would be great...thanks.


Jason
 
Jason924R said:
Sometimes while driving and keeping steady pressure on the pedal, my RPMs will fluxuate.

Anyone know some causes of this issue?

Anything to do with the PCV valve?

Any info would be great...thanks.


Jason
Click to expand...
My Trek Mountian bike did that all the time it was a user problem.
But in your case I would need to know more about it.
Maybe PCV or some other vac leak.
Could be an ID10t problem I had one of them some time back left a hose off!!

Jon
 
It might be my PCV valve cause I have yet to buy a breather for it so it kinda just sits there. I checked my vacuum lines and all of them seem to be good.

As for an idiot problem I don't really know about that.

I'm leaning towards my PCV valve.

Thanks Jon.
 
A/c on or off? When the compressor kicks on or off, the computer tries to adjust for the added/reduced load on the engine.
 
Ahh.

Well I drove it around for a little bit and it started acting up pretty bad now. I was turning the A/C on and off but I know it does it with it off.

About the PCV valve, is it supposed to be connected to the intake pipe that goes to the throttle body? I had some problems with my K&N intake so I got one from Downey with the chrome tube cause my old one wasn't level and it only has two plugs for hoses so my PCV valve is kinda just an unconnected hose. I was told to get a breather type thing that allows air in and out...what should I do?

(I'm goin to take some pics now, I'll have em up soon.)


*EDIT* Automatic Transmission
 
Your PCV has to go to the intake. Hence the acronym. Positive Crankcase Vacuum. That's your problem for sure. A breather type will not pass state inspection either. And It will probably not fix your problem. Most people here will say to lose the K&N as it allows dust into the engine. (That and it sucks in HOT air out of the engine bay instead of cool air from outside). It's probably costing you horsepower instead of giving you extra. Seen it on a dyno do just that. But anyway back to your problem get the PCV valve hooked back up to the intake even if ya gotta drill a hole in that pretty chrome tube and put in a nipple.
 
Ahh, nice. Yeah I have been driving it for about two weeks or more with the PCV unhooked. The downey intake is nice, but yeah If I have to I guess I will drill into the chrome tube.

Should I use a regular drill or some other tool?


(It passed inspection with it unhooked, is that strange?)
 
Pictures of the engine

I think the camera had some setting on where it only has a certain section is clear but I got 3 to show what I'm talking about.


e1.JPG

e2.JPG

e3.JPG
 
Yea, thats what it is, but it still need to go to the intake. a regular drill bit will work, just make sure you use a punch to mark the tube or the drill bit will walk around and scratch the tube. (It just makes a small dent so the drill bit will stay there long enough to get the hole started.)
 
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