I received my intake manifold yesterday, and i was gonna install it today. Then I was going to puth the 240sx TB. How do I change the Tb linkage??? I noted that the TB of the 280zx, has more connectors to it, liker water connectors, than 240 sx. How do I make it fit??? Pleaseeeee!!!!!

 

You can just bypass the water connections by routing a coolant hose to bypass the TB.That's what I did until I can get around to removing that pipe altogether as it doesn't need to be there if I'm not using it for my TB. Also though, the 240zx TB should have water connectors, they're just angled differently and need to be modified. If your's doesn't have them at all (like my TB) then just reroute the coolant like I said.

Alright I attached some pics. The first pic is of the entire hose routed around the TB.
The other two pics are where the hose begins and terminates. The one is right next to the TB. The other is right near the Air Regulator.

 

I used a grinder and took the pipe off completly and took off the TOP half of the linkage (to lazy to swap zx spring) then just grinded the intake manifold so it would work.

 

Oh and on the linkage, just use the linkage from your 280zx TB on the 240 TB. All's you have to do is remove the nut from the end of the shaft and all the goodies will slide right off. If you want to change the shaft too then you just remove the 2 screws holding the throttle plate onto the shaft inside the TB bore.

 

look this is exactly what I did, and maked a mess (a big one). I took off the 280zx Tb. Then I tought that the linkage was just the part that has yhe wire connectors. So I toiok it out and realize that in the inside it was not the same than the inside part of the 240sx. I tried to dissemble the one from the 240 sx, because I tuoght that what I needed to do was to change the whole inside axle from the tb of the 280, to the one of the 240. I started tooking out the nut in tthe end of the Tb, then all the other parts came loose, and the disaster,all came off, and now the 240 sx Tb looks like 25 small parts. Am I on the right way? It would be of great help if someone can tell me in a step by step way to change the throttle linkage. I need like throttle linkage for dummies.

 

Oh, and I am not sure what it was, but a little plastic part came ot of My280zx Tb linkage. But I put it back on my 280zx Tb and I think that it is working fine.

 

Alright alls you've got to do is install a couple of parts in order to make it work. Is your 280zx TB still intact? Or is that dissasembled too? If it is then I'll post some pics of the assembly order. Otherwise, if you haven't dissasemble the 280zx TB then make notes as you take it apart and then reinstall those parst onto the 240sx TB the same way they were on the 280zx TB. That's it. With mine, the shaft of the 240 TB was too long and interfered with the Intake manifold so I trimmed the shaft down to make it fit. Also, I didn't retain any Cruise control parts or anything either. If you need pics, just let me know.

 

yes I need pics, everything you can tell me. Yes my TB is intact. But the 240 TB has 2 rails ( i don't know how to call that)on the left side of the TB, and the 280 zx just have one. And where do I connect the long spring of the 280 zx TB, on the tb of the 240?

 

Here are the pics of what I did.. Hope it helps

 

ok. The third picture from left to right. That box with the plug, in the inside, its different when i compare it to the one of the 240sx.

 

Yeah you gotta use the one off of the 280ZX and just re drill the holes.. pain in the *** if you dont have a clamp or drill press

 

I just used the 240sx TPS... had to extend my sensor plug wires, but works just fine

 

ok. What i mean is that that piece that is in the 3rd picture. On my 280 Tb, there was an axle that came out of the tb and get in that part. The 240 Tb, don't have that axle hat goes inside that.

 

hey bro... I don't think any of us understand what you mean... u have a digi cam to take pics?

 

The shaft might have sheared off then or possibly was cut Regardless you can't use it. What you're going to have to do is take the throttle shaft from the 280zx TB and use it on the 240sx TB. In all honesty you could drive around without the TPS but performance would suffer as the computer wouldn't have that signal to use so it would use a default program instead. The engine really only rellies on the TPS to tell it where the throttle is in reference to how much air it's taking in. As long as the engine can read how much air it's taking in the TPS is really kind of supplemental on this system.

One other thing, this might sound silly but is the throttle plate inside the 240SX TB? or is it missing? If it's missing (not good cause you'll have to find another one) then there's a chance the shaft is just not inserted all the way and that's why it's not sticking out far enough to reach the TPS sensor (black box with the plug). If the plate's in there then you're going to have to change out the shafts or do without the TPS. I've left my TPS unhooked plenty of times and not noticed it until the next time I popped the hood. It's much worse to have one acting up then it is to not have one at all.

 

Yeah if it is missing that sucks man..

 

ok, i allready put together the 240Tb. Thanks for the pics. Now look at this pictures. The one in the leftis of the 240 linkage, and the one in the right the 280. As you can see there's a hole in the 280, that is not in the 240. how am i suppose to addapt that?

 

here are the pics.

 

WOW. that doesn't look anything like the TPS on the 240SX TB I put on. That must be a later style. What year motor did the TB come off of? That definitely wont work with the 280. It's a TPSensor. The 280zx uses a TPSwitch. They are not interchangeable. If you want to keep the TPS you're definitely either gonna need to go source another shaft from a 240sx at a junkyard (try to find an early S13) or see if the 280SX shaft will fit the 240 TB. That'd be the easiest way. When I had mine it looked like the shaft would fit but I didn't get a chance to try it cause I stripped the screws in the TB shaft/plate. See if the 280 shaft will fit first and let us know how that goes.

 

i think it's from a 1993. can I make it work? What will happen if i don't install the TPS?

 

can the 240sx tps be used with the 280zx EFI or do i have to swap the 280 tps over and drill new holes. the 240 has a switch not a sensor correct?

 

My car connector wont fit the tps of the 240 sx, right? What happen if I'dont connect the tps? will i nne dto buy another TB?

 

They key point people forget to tell you is it has to be the SOHC 12 valve engine. 1989-90 only. All the 91+ DOHC engines have the different throttle body that you got. It will not work. sorry

If you bought that off eBay and the seller says it will work on an L-series tell him the facts and demand a full refund for his innacurate info!

 

interesting... I pulled my 60mm TB from a KA24DE & just put together the linkage from several diff tb's that I had. I believe the SR20DE from the Infinity G20 is a 60mm as well, and also uses the ball linkage (just has to be flipped 180). The TPS should have the same plug as the 280zx, as well as a female plug on wires.

efrain... take some pics of your tb & post them on here so we can see in more detail what's goin on.

 

He did post the pics of the TPS and the connector is not compatible with the 280ZX's male connector. The TPS he has is not a switch like that on the 280ZX and early 240ZX's. It'a sensor and can actually account for the entire rotation of the throttle shaft. Efrain, if you run your car without the TPS you're not likely to notice much of anything. I do it all the time (not on purpose) as mentioned above. Your not going to do any damage not running your TPS. On some cars that absolutely require that signal it would make a differance. But I'm telling you from experience, the difference on the 280 is so negligable I have never noticed it.

I would try unbolting the throttle plate from the TB's and pulling the shaft out and seeing if the 280 shaft will clear the 240TB. If it does then it's problem solved. If it doesn't then you either need to run without TPS or try to get your money back and find another TB.