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Discussion Starter #1
Hi everyone, its my first post here.

I have 2008 FN2 and recently the engine seems to be a bit sluggish when cruising at a constant speed or when coming off the gas. The revs don't seem to drop down as smooth as they used too, at least that's how it feels. Its a bit like driving a car with choke on, on a cold morning.

But the car accelerates fine and idle's fine too.

I've replaced the spark plugs, air filter and also tried a add to fuel ignition system cleaner but still have not solved the issue.

Any ideas please?
 

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hi there usualy on the k20 engine in the crv and accord a dirty throttle body gives simptoms like this
it might be worth removing the throttle body and giving it a good clean with some carb cleaner or brake cleaner
when the throttle body is off you might as well clean the idle control valve stepper motor as these can gunk up as well
 

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Are you talking about the air assist valve? There's no iacv on the fn2.
OP, are there any modifications? Welcome btw
 

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hi there the fn2 might have a different throttle body set up
as the accords use the lower power version of the k20 engine with ivtec
 

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Discussion Starter #5
Thanks everyone for replying. No modifications have been made to car.

I've been doing a bit more reading and I'm starting to think it could be a PCV Valve, another guy had very similar symptoms to me. Could it be? I'll check it out tomorrow and see if anything obvious is wrong.
 

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The pcv valve is located to the left of intake manifold, the pipe runs from the centre of the intake manifold to the pcv valve. Usually you will hear a kind of gurgling/rasping sound on tickover. If you squeeze the pcv pipe and the noise disappears this usually indicates a faulty pcv valve. I replaced mine last year.
 

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Discussion Starter #7
I've checked valve and its making the same noise as others have reported. I made a video showing the sound change when the hose connecting to the pcv valve hose is pinched.


Would the pcv valve be a cause of the engine running problems I've described?
 

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Possibly. Are you using more fuel or oil than normal?
 

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Discussion Starter #9
No, nothing seems to have changed recently aligning with the engine issue. The car has used more oil overall in the past few years and I've had to top it up a few times.
 

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Definitely change it if you have done the test to confirm the pcv valve is faulty. Cox do the kit for 40 quid. Here's the valve...old and new.
 

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Discussion Starter #12
I've just picked up the valve only from my local dealer for £25.72. I'll check the hose but I think its okay.

Going to fit it now, fingers crossed.
 

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Discussion Starter #14
Ok. I've replaced the valve, its a bit fiddly but got it done.

You can hear the new valve working when the hose is squeezed now, sounds like a little suction sound and before it
made that rasping squeeling type noise.

The engine is running better when coming off the gas, not quite perfect but definitely feels much better.

Thanks for all the help Flashy & Everyone.
 
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