Andre The Giant

Is it possible to change the TPS harness with leaving the intake in place ?
If not would it be easier just to remove the sides (plenums) of the intake only ?

I can't see where the TPS connects to on the throttle body side, the other side no problem of course.

I will also be looking at PET to see how it is and doing some research also, but I'm sure there are others on this forum that have done this on a 928S before that could give me some pointers, pictures would be a bonus since I am not completely versed on all the terms yet, only my second year with this car.

davek9

It's always easier to work on an S3 w/ the sides removed (Just loosen the outer clamps) and the one to the brake booster.

IIRC you can get to the harness after you remove the Center "T"

Andre The Giant

Thank you Dave, I hope to get a chance to do this tonight, but I will not push my luck too much since my wife wants me to do some yard work, since I worked on the car all weekend.

Do you know if there is anything connected to those plenums besides the brake booster connection on drivers side ? I would not want to pull hard only to find out that I broke something I could not see ?

davek9

Yes, if you have the "stock" Air-pump and CAT's then there is a 10mm bolt on each plenum (at the rear) attaching the "test tubes", most i've seen are rusted off at the exhaust header and should be plugged down there if not being used.

Can't help U w/ yard work, too much of my own neglected to do list

Andre The Giant

Good one Dave about the yard work. Ok I will check to see if I can see those 10 mm bolts, right now I have some trouble picturing where they are except at the rear. I tried to check in PET, but they don't seem to show them. I will keep on searching for some pics which show the location of these bolts.

Thank you again for your assistance. I will update this thread after I have checked the bolt location live and input more pics to confirm.

Andre The Giant

Here is an update with some pics. After removing the sides of the air intakes, from the right side I can't see the TPS connection and from the left side I can see the rear portion of the TPS but not where the connection is made. I can see the connection deep inside from the front on the passenger side but how to access it is the real question ? If I don't have to remove the intake I will be a happy man.
If I do access it from the front with a long pair of needle nose pliers, do I squeeze the plug horizontally or vertically to squeeze the clip so I can start pulling on it ?

Andre The Giant

The center T on the intake doesn't want to come out, I can tilt it to it being almost out but it seems that on the drivers side there is what looks like a 1-1/4 hose below the centre of the tube which I have no idea how to remove/disconnect can someone assist, please. I have taken the small 1/2 inch tube which was connected to the left side of the center tube when working from the drivers side.

Bertrand Daoust

Sorry but can't help you much on this.

Maybe you'll find helpful tips here:
http://scott-yoo.com/other/intake.html

Andre The Giant

Thank you Bertrand, I already downloaded that word doc of his procedure and I could not find anything other than removing the intake

I was going to do a refresh of spark plug wires and plugs and intake next year, now is not a good time ! Oh well, i will keep on pluggin, next step is to purchase a set of long nose pliers in the range of 11 inches or so, just so I can try and reach that plug through the cubby hole in front.

Thank you all for your inputs.

Mike Frye

Hey Andre, I responded to your PM. When I did it, the only way I could get my unusually large (and manly) hands in there was to remove the side box and the ISV so I could get my left hand in and under.

I think I used a phillips head bit on a wrench or something to remove the two screws holding the TPS in there. I replaced them with allen bolts so I could do it again more easily next time (if necessary). I think the screws have some threadlocker on them too, so it's easy to strip those screws if you have a bad angle. Add to that the fact that it's adjustable and you have to find the right spot before locking it down and the screws may get a little buggered.

Hope this helped.

Otto Mechanic

Hey Andre, I did that a couple of years ago and I recommend just taking this intake off. It doesn't take more than about a half hour and it exposes everything. The connectors on the TPS cable can be replaced, if you haven't bought the whole harness it's a lot cheaper to just rebuild it. Let me know and I'll look up the name of the connector, I can probably figure out where I got them too. I actually have a couple extra since they were cheap and I was worried I might screw one up. I'm pretty sure they're a Bosch part but that's just from memory.

WyattsRide

Andrea, as Dave said replacing the TPS harness can be done, but you need to remove the "T" over the throttle body. There should be two large hose clamps over the rubber sleeve. One at the bottom that seals the sleeve to the throttle body and one on top that seals the the sleeve to the "T". You just need to loosen the top one and I was able to loosen it from the passenger side with a long screw driver. But it really depends on how that hose clamp is orientated. There is also a rubber hose connected to the "T" with a small hose clamp that you can get to from the driver's side. Once the "T" is loose from the large clamp it doesn't just pull up. You need to angle it just right to get it up past the rear and front intakes.

I don't remember if the small hose connected to the "T" goes to the ISV or out to the front of the engine.

With the "T" out you will be able to see the harness connected to the throttle body easier from the driver's side. If you are tall enough you might not have to lay over the engine like I did. I used a bent nosed needle nose to remove and install the harness.

Taking the intake "T" out is the easy part. Getting it back down and into the rubber sleeve is the bitch. I had my airbox and MAF out and reached my left arm (standing on the passenger's side) under the rear intake with a small plastic putty knife to help guide the "T" into the sleeve and keep rubber sleeve from pinching. My right hand was holding and wiggling the "T" into place. It took me very many tries to get it to seat correctly without any pinched sleeve areas. It will sit nice and stable when it's in correctly.

Andre The Giant

Thanks Mike, I followed the instructions from your post you sent me earlier in a PM and finally success the main intake T is out and I was able to then disconnect the tubing from the ISV, what a relief. Exactly why i don't want to remove the TPS from the TB because I have no idea or even the proper tools to adjust it back where it should be. I will have to find a way to remove that plug for the harness now. the original harness which is on has a thinner main cable on the harness so I'm not sure how to remove the connector from the TPS, it seems to have a metal pin surrounding the connector but I think the part that I need to squeeze I can't see.

For tonight I am done and here are a couple new pics of where I am now.

Ducman82

lots of junk down there!

Andre The Giant

Thank you otto but I'm not ready for my intake refresh yet, maybe next year.