can someone tell my why my car runs better with the TPS unplugged?
I've had some major bucking issues lately with my 00 Civic d16y8. I have on ongoing thread on my ordeal. If you want to read it for me in depth info you can find the link below. I had the car dyno tuned a little over two years ago and everything has been fine until recently.
*stock TPS with a Blox TPS (.5 closed 4.5v WOT)
*cap/rotor less than 6 months ago
*fuel filter less than 6 months ago
*swapped a known good chipped P28 ECU
Why does my car run "normal" (CEL on and crappy mileage) with the TPS unplugged? Could it be the Blox TPS or a bad plug? I'm about to throw in the towel and take it to a dealer and have them diagnose it for me then I'll fix it.
Re: can someone tell my why my car runs better with the TPS unplugged? (gimmezell)
In a case like yours, I would go as far as to run completely new wires to the TPS and to the ecu, because you have ruled out everything in between.
If you swapped a known good ecu and it still did it, and put in a new TPS (which was sourced from ebay?!) My guess is that assuming the TPS is good, which you have said it is, then the only thing between the tps and the ECU is the wiring..
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Re: can someone tell my why my car runs better with the TPS unplugged? (sanimalp)
The simplest answer is often the one overlooked. If everything is in spec and it runs better "running rich" with the TPS unplugged and CEL on... perhaps you're running lean or too advanced (Chipped ECU) when everything is plugged in. Get it tuned properly.
Are you running closed loop with a stock o2? Does it run ok WOT?
I've replaced the stock O2 with one from Rywire.com and from what I can tell it runs decent at WOT. I say decent only because it doesn't feel as smooth as to when I disconnect the TPS. This maybe all in my head though (placebo effect).
Do you know if your CEL/MIL or any sensors are disabled on your ROM? If your not sure, the person who tuned your car would know. Ask them to be sure, you could have a CEL condition that's not showing.
I have two BIN's and I can't remember which on is on there now. I don't have access to a Moates until Friday.
The 1st BIN just has the knock sensor disabled and the second BIN has the knock sensor, ELD, atmospheric pressure sensor and injector test circuit disabled. I'm 95% sure I have the 1st BIN on the chip.
for the past few months i've ran 2 different omni tps's and both did not work out for me. after about 1k miles on each, it would start hesitating and bucking again. so i left it unplugged for a while also. and today i finally got a used oem tps with low miles and installed it. it's running great. so much smoother. i hope it stays that way. i've been dealing with this **** for over a year now. it's so annoying. maybe try a good used oem tps OP and see what happens.
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