Throttle Body Question

Post by **king_johnthegreat** » Fri Jun 13, 2003 7:14 pm

Hey all, I have a question as to weather or not the stock TB from a '98 or narrowly older model 240SX has a Throttle Postion Sensor with a Wide Open Throttle switch, as well. That would look like a sensor on the side of the throttle body, at the end of the throttle plate rod with TWO electrical connectors. I am currently using a TB from a '91 240SX, and it only utilizes the TPS, no WOTS. My vehicle is a 2001 Frontier pickup truck with the KA24DE, and it uses a TPS and WOTS on the TB. I would like to use the WOTS, since I have a connector for it, but the '91 will not even fit the sensor from my truck. I am running the 240SX intake manifold, as well, from a '95 model. I am asking you guys because you tend to know a whole lot more than my parts department!! Thanks in advance for any help, and if you have a '95 or newer model, pop the hood for, please! John

Post by **KApwr** » Fri Jun 13, 2003 7:14 pm

king_johnthegreat wrote:Hey all, I have a question as to weather or not the stock TB from a '98 or narrowly older model 240SX has a Throttle Postion Sensor with a Wide Open Throttle switch, as well. That would look like a sensor on the side of the throttle body, at the end of the throttle plate rod with TWO electrical connectors. I am currently using a TB from a '91 240SX, and it only utilizes the TPS, no WOTS. My vehicle is a 2001 Frontier pickup truck with the KA24DE, and it uses a TPS and WOTS on the TB. I would like to use the WOTS, since I have a connector for it, but the '91 will not even fit the sensor from my truck. I am running the 240SX intake manifold, as well, from a '95 model. I am asking you guys because you tend to know a whole lot more than my parts department!! Thanks in advance for any help, and if you have a '95 or newer model, pop the hood for, please! John

Hey John, I believe the WOT switch on the TB was only used on automatic trans. equipped 240's but not sure what year models. I know for sure that 95 and up had them but not sure about 91-94 240's. Good luck!!

Post by **king_johnthegreat** » Fri Jun 13, 2003 7:14 pm

So then a '95 and up TB from an auto 240 should do what I want? Sounds fine, if anyone can confirm that, too, it would be much appreciated! Thanks, KApwr, and the project is going great!! I just installed my T3/T04E Super 50 trim turbo and RevHard mani, plus cleared the way for my Spearco liquid to air intercooler. I finish up the intake/TB situation tomorrow, and weld up the DP and wastegate piping on Mon. I think this should make my truck shove pretty hard, what do you all think?John

Post by **KApwr** » Fri Jun 13, 2003 7:14 pm

Sounds good John. I have a 2001 Supercharged Frontier Crew Cab and sometimes wished I should have gotten the KA and do what you're doing. Keep us posted on your project. Do you have any pics of the project? Keep up the good work!!

Post by **king_johnthegreat** » Fri Jun 13, 2003 7:14 pm

I am developing some pics of the manifold swap today, and there will be many more to come. I should have some pics up by tomorrow; maybe even later tonight. I have some shots that show the turbo, and the progression of plumbing everything. I got everything buttoned up just about an hour ago, and it actually went quite smoothly!! I just need to adjust the throttle cable tension, and relearn the idle air control to the PCM. The new IC piping gets finished up tomorrow, then off to the dyno.John

Post by **king_johnthegreat** » Fri Jun 13, 2003 7:14 pm

Here's my other question: what are the color codes of the three wires from a '91 TB TPS? There is a red, black, and whit wire. I'm guessing that red is B+, black is ground, and white is signal; am I right? I'm running an S-AFC, so I will likely run a sensor check to make certain, but I would like to have it right before I fry anything!! The manifold is so much better than the stock truck's mani, and having a TB I can actually clamp onto is great for running bigger boost. It's too bad that the truck's block blows goats, but I've got a whole other 240 KA to build up with rods, pistons, and studs, etc. Thanks for the help so far, it goes a long way!John

Post by **KApwr** » Fri Jun 13, 2003 7:14 pm

king_johnthegreat wrote:Here's my other question: what are the color codes of the three wires from a '91 TB TPS? There is a red, black, and whit wire. I'm guessing that red is B+, black is ground, and white is signal; am I right? I'm running an S-AFC, so I will likely run a sensor check to make certain, but I would like to have it right before I fry anything!! The manifold is so much better than the stock truck's mani, and having a TB I can actually clamp onto is great for running bigger boost. It's too bad that the truck's block blows goats, but I've got a whole other 240 KA to build up with rods, pistons, and studs, etc. Thanks for the help so far, it goes a long way!John

That is the correct about the wire color for the TPS. BTW, what's different about the truck block? Never hurts to learn about more Nissan stuff. Keep me updated. Thanks!!

Post by **king_johnthegreat** » Fri Jun 13, 2003 7:14 pm

The truck's block lacks a great deal of the meat found on the 240 KA block. The 240 also has added brackets that extend to below the oil pan flange surface to bolt to the transmission bell housing and the block sides. Much more sturdy, and an absolute must for high hp and torque. The 240 also runs the oil pump directly off the crank, inside the lower timing chain cover; whereas the truck runs the pump outside the lower timing chain cover, on the passenger side. The distributor on the truck has an internal coil, and is run off the crank. The 240's distributor has an external coil, and is run off of the idler sprocket inside the upper timing chail cover. Beyond that, much about the two is the same: head castings, oil filter blocks (Very similiar), cams interchange, as well as the rest of the valvetrain. The bottom end on the 240 is bullet proof, but the truck sucks. The 240 has a one piece crank girdle, but the truck has individual two bolt main caps. Here are some pics of my swap (I am getting more, but I ran out of film).

Thanks for confirming my wiring ideas for the TPS, BTW. More to come...John

Post by **KApwr** » Fri Jun 13, 2003 7:14 pm

Thanks for the pics and the info on the truck motor. FYI, the 95 and up 240's have an internal coil but does run off the idler sprocket that's bolted to the head. Keep me posted. Thanks!

Post by **king_johnthegreat** » Fri Jun 13, 2003 7:14 pm

I'll definitely be getting more pics of the completed engine bay, just as soon as I get more film. I just had the piping welded for the new BOV, too.John

Post by **KApwr** » Fri Jun 13, 2003 7:14 pm

Hey John, have you found a clutch yet? I'm not sure but I know the older trucks use a 240mm clutch vs 225mm for 240's. I think some guys have used a lightened flywheel off the truck so they can put the bigger PP/Clutch combo for more HP/torque capacity than currently available for the 240. Let me know if you have any details on this as far as the validity.

Post by **king_johnthegreat** » Fri Jun 13, 2003 7:14 pm

I know that there is a CenterForce clutch kit for the trucks, actually two or three. I'll hunt through my favorites and try to find the site that offers them. You may also be able to find the site through the links page at http://www.nissanfrontier.net. There are all kinds of drivetrain mods and equipment sites listed there.John

Throttle Body Question

Throttle Body Question

Re: Throttle Body Question

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