Hi All
can anyone tell me if the EGR valves are open or closed when there is no vacuum and what position they should be in at idle on my CRV 2.2 diesel.
Cheers
Kevin

 

Hi KevinK,

At negative vacuum the EGR valve is fully closed on valve seat and as vacuum increase’s to positive the valve opens off the seat – To test the operation of the EGR valve you will require a handheld vacuum pump with indicating gauge, such as the one shown in the link below.

http://www.ebay.co.uk/itm/like/29098...13=80&ff14=108

 

Hi UK-Kev
At idle both my valves are in the raised position. Ive been told that the crv diesel has a vacuum pump so does the control valve get a signal from the EMU to close and shut off the vacuum and what conditions does it open the valves?
Also the turbo waste gate control is in the fully up position at idle, are both these correct?.
Forgive the silly questions but i am trying to understand why my acceleration problem disappears when i rapidly pump the brakes which i assume uses up all the stored vacuum. what i cant figure out is what is happening through the system that gives me this momentary fix because as soon as the vacuum builds up again after a few seconds the problem returns and i have cant accelerate properly. By that i mean. when stationary at the lights, if i rapidly pump the brakes till hard then immediately pull away its fine. if i pump the brakes and wait a few seconds i cant accelerate properly.
Cheers
Kevin

 

bump

 

Hi,

At idle the EGR valve is raised to the fully open position, this is correct.

What is the seconed valve you are talking about!!!

Most diesel engines, well all the ones I've ever worked on have a vacuum pump to operate the brakes etc.

Not aware Honda fitted a turbo with a waste gate on your engine!!!

Not sure about your other questions, however when talking about a seconed valve (re above) do you mean the vacuum MAP sensor?

Rgs,

Kev

 

Correct, the crv at one point had an engine called the CTDI, very awesome engine. Wish we had it here in the states.

 

http://www.lingshondaparts.com/hpl/i...ge/E__3430.jpg
I hope the link works. The 2 valves I am referring to are number 1 and 14. I believe #14 is the cooler bypass valve.
Cheers
Kevin

 

http://www.lingshondaparts.com/hpl/i...ge/E__3410.jpg
Hi Kev
My mistake, I assumed that the vacuum controlled diaphragm was a waste gate. Does it control the variable vanes.
Can you think why the problem disappears when I pump the brakes to remove all the vacuum?
Cheers
Kevin

 

Hi KevinK

I can only think that the adjustment rod between the turbo variable vanes and the diaphragm requires adjustment. Sorry I have no information to offer regarding rod tolerance / setting.


To try and answer your question:- Can you think why the problem disappears when I pump the brakes. I believe that when the system is going into negative vacuum (pumping the brakes) the rod adjustment is going, or should I say trying to go beyond the map / rod setting – hence this is why I believe it needs adjusting .
Rgs,

Kev