The accordion like line hose between the airbox and the TB has some small holes in it on the top of it. Can that throw a check code for bad air flow readings??? In the top of the ridges about half way on the tube there are tiny holes from rubbing on the bottom of the hood I assume. That mid section is a bit brittle.

 

Yes it could. It doesn't take much of a hole to throw things off.


Dave

 

some duct tape to seal it works well until you can get a new one installed

 

With the heat in the engine compartment Duck Tape or black electrical tape will melt off use a high temperature tape for your repairs if you elect to do so. Keep in mind that it is a temporary repair and may not last long I ended up replacing mine. This link is how I did my repair.

Link JagRepair.com - Jaguar Repair Information Resource

 

Black Hi-Temp gasket silicon worked really well for me. Just clean the surface really good with a degreaser first.



Dave

 

I agree with Dave!

When I bought my 1999 XK8, neither the previous owner nor the Jaguar dealership he took it to could get the check engine light to go off, so the owner sold it to me for half of Edmunds used car price.

Took the flex TB air hose off, and found several burn-throughs underneath.

Used high-heat silicon, and problem solved.

YES...even a slight hole in the tube can cause a code like that to pop up.

 

maybe that is my check light. I know it was pretty much in one piece then one day I moves that part for some reason and BAM there popped the holes in the top of some of the ribs. I guess will fill them as suggested here and see what happens. I do think there is enough opening there to throw the light.
So the HI temp silicon won't pop off and get sucked into the TB????
Do I find this stuff at a car parts place, it is made for car specifically?

 

The stuff I used is for cars and its Permatex High Temp Black Gasket Silicon. Its pretty tenacious stuff. It stays flexible so vibration won't make it fall off. The most important thing is to thoroughly degrease the area it goes on and of course make sure its fully set before you fire the engine up.


Dave

 

Hi.


Any air leak after the MAF (Mass Air Flow sensor) will upset your fuel trims.
The upstream O2 sensor will sense a to lean combustion and send a signal to the ECU (Engine Control Unit) which will add fuel giving rich (positive) fuel trims.
If the fuel trims get too high, they will give you the infamous codes P0171 and P0174. If it gets really bad, you may also get reduced performance message.

 

well I will patch it by the weekend. Prob I see is that I think the hood insulation pad has been rubbing on it so that may just take off any patch I do.

 

I had always thought silicon damaged oxygen sensors. I used duct tape once just as a temporary situation until the new part arrived, didn't have any heat issues with the tape.

 

Wouldn't muffler tape be a better choice than duct tape?

For example:
Design Engineering Cool Tape 2" x 60' 010413: Get the best Heat Shield Tape/Ties/Clamp at Advance Auto Parts
Versachem Muffler Repair Tape 10270: Search no more for the best at Advance Auto Parts

 

If the silicon is applied properly there is very little change of it getting "sucked in". I've used this on 3 cars with the same problem and one even after 4 years was still holding up just fine.


Dave

 

You have a CEL on put didn't provide your codes? Fixing any air leaks would be recommended but listing your codes first before a repair would be useful.
As mentioned above if you monitor your fuel trims (short trim mostly) with Torque pro then do the repair to the holes you will see a change you can measure. Good Luck

 

I am waiting for my adapter to come in so I can use torque pro to see what my codes are. The car is not driven much at all right now anyways, so not worried about hurting anything.