bad TPS? (video)
05-09-15, 02:20 PM
#1
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bad TPS? (video)
i tried unplugging the TPS and it does the same thing. also took the TPS off the mounts and pushed it in and nothing seemed to be happening, also, i tried to check the resistance of the tps and wasn't getting any readings whatsoever (im an electrician so i know how to use it :p)
thanks again
05-10-15, 11:10 AM
#3
Try checking for voltage on the Green/Red wire w/key to on after the car is completely, and not partially, warmed up at ECU pin 2G. It should read 1 volt at idle and increase to about 4.5 volts w/the TPS plunger fully extended (basically at 3k rpm or higher).
05-10-15, 01:19 PM
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Great. I'll try that. Thx satch. I'm kinda at my wits end haha
05-10-15, 02:32 PM
#5
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RotaryHeads.com - 2nd Gen RX-7 PDF Technical Manuals FC3S
Open the FSM, section 4A. Do the procedures listed on pages 4A-77 through 4A-79
Open the FSM, section 4A. Do the procedures listed on pages 4A-77 through 4A-79
05-10-15, 03:01 PM
#7
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Pin 2G will be on the ECU.
You can also just backprobe the connector with everything still hooked up.
The absolute best way to actually set the thing is via the light method. See http://web.archive.org/web/200902080...odes/main.html . Shows how to make one for a couple of bucks.
You can also just backprobe the connector with everything still hooked up.
The absolute best way to actually set the thing is via the light method. See http://web.archive.org/web/200902080...odes/main.html . Shows how to make one for a couple of bucks.
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05-10-15, 03:16 PM
#8
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Okay so I warmed it up. Back probed off the TPS.. No voltage readings.. So I put the act probe on negative of my battery. And Back probed again. All three terminals are at 5 volts on idle. I Rev it up and it stays the same.. Coukd this be my issue?
05-10-15, 03:28 PM
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Also. When I was checking for resistance across the female end of connector. I wasn't getting anything across ground.. Unless I put one lead on negative of battery.. Possible that I have a grounding issue as well?
Last edited by WhatsAWankel86; 05-10-15 at 03:30 PM.
05-10-15, 03:32 PM
#11
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Not suprising, a little bit of heat can expand things just enough to make contact again.
The male end should have the ground, as far as I can recall. The TPS doesn't ground directly, it grounds all the way back at/near the ECU.
The male end should have the ground, as far as I can recall. The TPS doesn't ground directly, it grounds all the way back at/near the ECU.
05-10-15, 03:36 PM
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05-10-15, 03:45 PM
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If you were to unplug the TPS and measure the ground wire of the emission harness (plug on the opposite side of the TPS plug). Ground wire on an 86 is Brown/stripe but it is not the Br/W wire as that is the voltage reference wire. So you have G/R, Br/W and the ground wire.
Another thing to check to make sure your problem is limited to only your TPS would be to check the 4 wires at the pressure sensor w/key to on and sensor plugged in. B/W will have 12 volts, Br/W has 5 volts, Br/R has between 3 to 4 volts and the last wire is the ground.
Another thing to check to make sure your problem is limited to only your TPS would be to check the 4 wires at the pressure sensor w/key to on and sensor plugged in. B/W will have 12 volts, Br/W has 5 volts, Br/R has between 3 to 4 volts and the last wire is the ground.
Last edited by satch; 05-10-15 at 04:07 PM.
05-10-15, 04:14 PM
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If you were to unplug the TPS and measure the ground wire of the emission harness (plug on the opposite side of the TPS plug). Ground wire on an 86 is Brown/stripe but it is not the Br/W wire as that is the voltage reference wire. So you have G/R, Br/W and the ground wire.
Another thing to check to make sure your problem is limited to only your TPS would be to check the 4 wires at the pressure sensor w/key to on and sensor plugged in. B/W will have 12 volts, Br/W has 5 volts, Br/R has between 3 to 4 volts and the last wire is the ground.
Another thing to check to make sure your problem is limited to only your TPS would be to check the 4 wires at the pressure sensor w/key to on and sensor plugged in. B/W will have 12 volts, Br/W has 5 volts, Br/R has between 3 to 4 volts and the last wire is the ground.
05-10-15, 05:23 PM
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Okay. Yeah 5V on the power and 0.1 on the other two. With tps D/C and key forward
05-10-15, 06:29 PM
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05-11-15, 05:42 AM
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05-12-15, 03:09 PM
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05-14-15, 10:19 PM
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Well... i got a new TPS, and the idle is no doubt smoother,
however i will still occasionally get a huge hesitation while driving, and then it starts to run rough (like the video) but is not as bad and does not last as long.
So my thoughts are it was the TPS along with something else?
any more suggestions? thanks again everyone
however i will still occasionally get a huge hesitation while driving, and then it starts to run rough (like the video) but is not as bad and does not last as long.
So my thoughts are it was the TPS along with something else?
any more suggestions? thanks again everyone