As I have come to understand the TB's on these cars are picky to say the least... The other day when I had taken the cam covers off to inspect the tensioners, and put it all back together (with a broken PLB hose) the car idles VERY rough, and kind of sputters when reving it up even slightly, so I decided to clean off the TB. I got the butterfly valve cleaned up pretty well, but I can still see a bunch of s**t under the butterfly. My question is what would be the best procedure to clean the TB more throughly?

Would removing the TB be the best option? If so, what would be the "proper" procedure for removing all of the hoses that lead to it?

From what I can see, it looks like there are a number of hoses that lead to the TB... Are they all different sizes so there is no way of putting the wrong one to each spot? Also, how difficult is it to remove?



Thanks,
B

 

The only critical part of throttle body cleaning is the edge of the butterfly valve and the throat at that point. Most continue on but it really contributes nothing.

 

Removal-
Remove two coolan lines and plug them.
Remove electrical connectors (4?)
Remove large part load breather connector
remove 4 botls securing TB
Carefully move sire loom and remove TB

 

On the many of the hoses, I've encountered the (brilliant) connector, rumor has it there is a plastic tool to remove these, has anyone ever seen one?

I've had a difficult time removing these, the PLB hose (from the cam cover to the TB) I actually had to just cut the two plastic things to get it off...
Is there a tool that could be easily made or purchased to remove these? Given the age and brittleness of the plastics, I would rather not use a pliers or screwdriver to attempt to remove these for fear of breaking something.

Any info regarding that would be very helpful.
Thanks

 

I think it's best to leave sleeping dragons alone. The possibility of messing up that Norma connector or damaging one of the other hoses makes it too risky. You can wrap a rag on a stick and get more of the gunk out, but it's not going to improve performance significantly.

If you do remove the TB remember to replace the crushable gasket.

 

I think I may have to agree... However, when it comes time to remove the PLB hose, will i have to pull the TB out?

What would be the best way to hold the butterfly open?

Thanks

 

At least a couple of members have been able to snake the new tube through. Maybe taping the end of the new one to the old would work.

I just use a piece of wood to hold it open.

 

I have one of those tools. When I did my tensioners i found it in a fitting under the throttle body. I had read somewhere that they are stored on one of the fittings. When i finished with it i put it back there. Take a good look around you may have one and not no it. I have read where you can use needle nose pliers and do the same thing as the tool.

 

I use long needle nose pliers: pretty straight forward.

Don't forget to clean the MAF sensor, as well, as the throttle body.

 

Gonna clean up the MAF when I get ready to put it all back together. Gonna need a new air cleaner me thinks... Going to try and source one from a local auto parts store... any suggestions on the best air cleaner? I believe the one that is in there is a Fram (garbage).

 

I bought one a few years ago from Advanced Auto Parts: opened the package and the cellophane sleeve showed it was OEM Jaguar part. Pretty tough to screw up an air filter.

 

I personally just think Fram is garbage... It looks like there is a pretty good deal on the NAPA Gold filters for it for about $19.00

 

Brand name never designates quality. For example, MANN can -- "can" -- make exemplary product, but can make "average" as well. WIX isn't known for high quality but can beat other manufacturers. I would recommend going for non-sh**e and expecting "average" performance with the expectation you'll change it out within an approved amount of time.

Here is a non-Jaguar example of my comments.
http://www.gmtruckcentral.com/articl...lterstudy.html