2 tps connectors. ??

[spider_slayer]

i have a 92 240 that i have put a junkyard engine into. the problem is that the harness that i have now has only one connection for a tps but the actual tb has 2 sensors on it (a plug on the actual sensor, and a plug coming out of the sensor) i plugged the original harness into the plug coming out of the tb but what do i do about the actual sensor??

[deviousKA]

The tps connector that is built into the actual tps unit (one that comes straight out the front) is the tps idle/wot switch.

On a 5 spd, only the the idle switch is used, both the idle/wot are used on the auto. So on this connector if your car is 5spd harness you will have 2 wires, if it is auto you will have 3.

The connector that hangs off of the tps with the 3 wires is the actual TPS potentiometer and is definately required.

You need that second connection hooked up, your harness should have the connector for it, all nissan harnesses have them. It should be about 3-4 inches down from the other tps connector, wire colors may be white, black, and light green with red stripe.

On the actual tps connector the wires are red, white, and black, they change when going through connector.

That might not be clear, feel free to ask.

[spider_slayer]

ok, i hooked up the plug that hangs from the tps sensor. so since my car is a 5-spd and the engine obviously came from an auto can i cap off that other connection?

[deviousKA]

No, you need both.

I shouldnt have mentioned the thing about the auto/manual difference, all that I meant is that one of the plugs on the auto uses 3 wires and on the 5spd it uses 2, as in one pin is not used on the connector. The TPS are the same for both.

If your car is a 5spd then that second connection (which woudl seem to be the main one as it is right on the tps body) should have 2 wires in a 3 pin connector.

It needs to be connected to your tps, both do. If you dont have the 2 plugs then one of them has been cut off, if that were the case well then you would have to fix that.

What that second connection that you dont have connected right now does is tell the ecu that your throttle is fully closed. This is required for many functions including iacv, timing adjustment, etc....

[spider_slayer]

ok, i get what your saying. but i'm looking at both of the throttle bodies right now and the old one only had one plug hanging off of the closed black box. the new engine has the plug hanging off of the throttle body and another connection actually on the box. secondly nothing on the harness has been cut, when we pulled the blown engine all plugs were disconnected and labeled. all of the plugs have since been replugged i jsut have the extra connection on the tb now....

would it be possiable to take the old sensor off ot the other tb and switch them so the harness matches the tb

[spider_slayer]

if i can find a digi i'll take pics tommorow.

[deviousKA]

Ok well you must have a harness and tps I have never seen, weird.

Just take the tps off your other throttle, make sure you have it set about the same, adjustment wise.

[wild_maxx]

(threadjack) quick question about tps voltage... when setting the tps position on the TB. you need to measure the amount of volts the tps is putting out at closed and WOT correct?

Do i use voltage meter of use an ohm meter?

what setting should i use on either?

and what voltage should i be looking for while adjusting the tps?

I grounded my negative probe on my meter then pluged the positive probe in the back of the smaller plug (directly on the tps) but i am not sure what wire to probe into... so what one?

sorry to jack your thread spider.... but this is good info that will help another person in the future.

[corn322]

Here ya go, straight from the FSM. It should be between .4V and .5V with the throttle closed.

[spider_slayer]

(sorry to jack your thread spider.... but this is good info that will help another person in the future.

i'm still working on getting a camrea from my friend. but i work alot so it probally won't be until sinday. i did look at the 2 tb's again jsut to make sure i'm not crazy and i'm not. they look identical but there is a black cap that went over the connector that is right on the actual black box. so i'm gonna try jsut not plugging it in first.......then if that fails i'll switch the sensors.

[s14 2510's]

Could it be a 95 or above engine that you put in? I put a 95 ka in my 91 and swaped throttle bodys because the 95 had two plugs and 91 had one.

[spider_slayer]

could be. the guy at the yard said it was out of a 94. but maybe he is crazy. im just happy that someone else has had a tps with only one plug. this proves that they do exist.

how much did you guys gap your tb's when you switched them? or does the ka have a bypass for air so you don't have to?

[s14 2510's]

I wrecked the gaskit taking the s13 one off so I just rtv'd the new one on.

[spider_slayer]

i didn't have to take off the tb........just switch the sensors. i just want to know how much to gap the tb valve because i don't think the ka has a bypass when it is started........also the FSM is worthless.

[s14 2510's]

it took me less time to swap the old throttle body that worry about that $hit

[spider_slayer]

still would have to gap the tb door.... also if anyone knows how much the tb door needs to be gapped let me know, right now i have it set at about 1mm open at closed throddle.