Sorting through a recently purchased 2009 DB9 Coupe with 40K miles.
All went smooth with the 40K maintenance until the ECU threw P0171 and P0174 codes and the Emmission Service Needed warning appeared.
As part of the 40K service, I cleaned the MAF sensors, changed the air filters, and cleaned the throttle bodies.
As I was working through the codes checklist, I checked the vacuum on each side of the engine. Driver side measured 18inches and passenger side measured 15 inches.
After a rigorous visual inspection, I finally reached my hand behind the passenger side manifold to check the vacuum line and found the leak. Apparently at some point in the car’s ownership, something chewed a hole in the connector. Wanting to verify the problem, I placed some duct tape over the hole and re-took the measurement. It now matched the driver side.

I took a trip to my local AM dealer to talk with the parts manager, who has helped me out in the past. He was able to order the hose (they come in a pair) and the cost was reasonable. Bonus is that AM sends the parts overnight. He said that the hose might be able to be changed without removing the manifold if the center plate between the manifolds is removed.

Has anyone replaced this hose, and did the manifold need to be removed in order to replace it?

Thanks,

Jim

 

I am assuming that this is the RH side of part 13 in this screen: https://www.scuderiacarparts.com/par.../151/668/23911

The part that comes to the "V" in between the manifold is pretty easy to change & can be reached by removing the piece suggested. The end between the firewall and the block is more challenging just because of the clearances.

I've long wanted a sheep shearing harness so I could lay across the top of the engine when working on the backside of the motor - definitely a good stretch!

Best
Larry

 

If you remove the center plate you can split the old lines apart and tape the corresponding side to the old one to fish thru. The new one should be labeled as RH/LH to correctly fit to the fuel pressure sensors on the rails.
JW

 

Larry and JW,

Thanks for the guidance. I think I’ll give it a shot.

Best,

Jim

 

Have you considered a cantilevered creeper? For trucks and cars like this you just lie on your belly and do your thing.

 

Update -
I ordered and received the vacuum lines. After removing the braces and manifold cover, I just could not get in the right position to remove the vacuum line from the rear of the manifold and wasn’t quite ready to do a manifold removal.

I decided to take it to the local dealer in Vegas to see what they could do and could not be happier. The service advisor called in the tech to take a look, and the tech took it on as a challenge to remove and replace the vacuum line without removing the manifold, which was difficult but he got it done at a reasonable cost.

Will get the car back today, and now on to a complete brake service.

Jim