I've been having this problem for a few weeks not and I'm truly at a loss.

First of all, a little background. The car is a 94 Civic EX with a 98 GSR swap. A few weeks back, my friend and I had to pull the motor out to re-thread the holes for the motor mount. When we were pulling the motor out, two of the prongs for the TPS broke off. Luckily, my friend had a spare TPS off his old d-series motor so we threw that in.

So now the motor's back in and everything's good except that I can't get the right voltage off the TPS. Adjusting it fully clockwise (I think it's CW anyway, could be CCW) gives a voltage of 3.4 volts or something at WOT and nothing at idle. In fact, it doesn't show any voltage at all untill the throttle is opened around 40%. Turning it the other direction drops the voltage till it gets to like 2.5 volts or so at WOT.

I've tried 2 different TPSs (one of which was straight out of a friend's car, where it worked fine) and changed the plug as well, nothing seems to make a difference. I've reset the VAFC as well. I really don't know what else it could be, the only thing I haven't tried is a different ECU. Any suggestions here?

 

Bueller?

 

try setting it in the middle position...that seems to work for me, whenever I had to adjust my TPS sensor for whatever reasons. Also, take a look at the TPS upclose, usually you can see a sort of dirty outline of the washers that hold the TPS in place...try to match up the screws to the those ghostly washer outlines...

 

What's with you and the TPS reports?
Didn't you get the memo?

 

haha was about to say the same thing...

have them on my damn desk in the morning

 

mmmmmmkaay, yeeeaaaah.....

"Lumburg, is all that is evil and souless at Inninet"

 

I was having a prob with my TPS and thought it was the sensor, but it was actually the plug that goes into it. There are 3 wires that go into it. The yellow one is the voltage wire and mine was got ripped out some how..... I know I did it bec no one else works on it, but I can't remember for the life of me when I would have yanked it it that hard. Anyway, I stated having probs now and then before the wire came completly off. So maybe the low voltage is a partial tear. Check that out too. Mike

 

Sorry to bump this thread again, I didn't see the replies until just now.

Middle position doesn't work for me either. The highest voltage I can get is 1.5V too low, and that's in the fully CW position.

Yeah, like I said, I already changed the plug once and it didn't help. Now that I think about it though, I should probably trace those wires as far back as I can.