Car is acting up...why?

[04LemansZ]

Twice within the past week I have been driving my car and it's like the car goes into limp mode. All my power stays on, the RPMs stay at idling level, but the car won't go. I press the gas pedal and nothing happens. So I have to clutch it and turn the car off and recrank it. Today when it happened, it made this awful grinding sound when I tried to recrank it. It finally cranked, but I have no idea what's going on.

Any ideas?

[John@Z1]

What lights are coming on in the dash?
When you cranked it the last time how many times did it take to start the car?

Right now it sounds like a cam sensor issue to me.

[04LemansZ]

What lights are coming on in the dash?
When you cranked it the last time how many times did it take to start the car?

Right now it sounds like a cam sensor issue to me.
The only light I remember seeing is the SLIP light, but I'm pretty sure more lights were on. Now the Service Engine Soon light is on and has been since the first time it did this. Today I think it took three turns of the key before it started back up. The first time it happened it started right back up.

I was pissed today when it happened because I was in traffic :mad:

[John@Z1]

Do you have someone that can read the codes? It really sounds like a cam sensor.

[UofAPPW]

sounds like a color issue to me. is your car LS? that could be the problem

[jthomas_50]

sounds like a color issue to me. is your car LS? that could be the problem

Definitely a color issue.

[rh_334]

sounds like a color issue to me. is your car LS? that could be the problem

:+1:

[04LemansZ]

Do you have someone that can read the codes? It really sounds like a cam sensor.
Can you elaborate for me? What does that mean? I'm sure the guy that tuned my car could read the codes, or Brad could. Or I could take it to the stealership...

[rh_334]

Can you elaborate for me? What does that mean? I'm sure the guy that tuned my car could read the codes, or Brad could. Or I could take it to the stealership...

no its not that complicated, take it to any Advance Autoparts or Autozone and ask them to read your OBD II codes, its free and write down what code it is so that John can determine what the prob is

[04LemansZ]

no its not that complicated, take it to any Advance Autoparts or Autozone and ask them to read your OBD II codes, its free and write down what code it is so that John can determine what the prob is
Going there now. Check back soon :)

[04LemansZ]

Ok, the code is P2135 - TPS/Pedal Position Sensor/Switch AB/Voltage Correlation.

Now what?

[John@Z1]

well that's the sensor on the gas pedal. You haven't replaced tail lights lately have you?

[04LemansZ]

well that's the sensor on the gas pedal. You haven't replaced tail lights lately have you?
I replaced them with the '06 LEDs but that has been a year or two ago. How would tail lights affect that?

[John@Z1]

I replaced them with the '06 LEDs but that has been a year or two ago. How would tail lights affect that?


Don't worry you have the 06 lights.

[BRAD@ZSOLUTIONS]

isnt that a 03 model?? Replace the throttlebody. Thats a issue on the 03-05.

[04LemansZ]

Don't worry you have the 06 lights.
Ha, alright.

Now what do I do about my code though :thumbsdown:

[BRAD@ZSOLUTIONS]

The $$$$ on that piece used to be very $$$$ nissan saw the problem and now there half as much. Let me know

[BRAD@ZSOLUTIONS]

Ha, alright.

Now what do I do about my code though :thumbsdown:

If a scanner isnt handy the code can be cleared by disconnecting the batt, for 5 min

[BRAD@ZSOLUTIONS]

i hope im right. Ive done many on the Gs and Zs. Also the maximas and the i35s

[jthomas_50]

I've looked around, and I think Brad may be right. It's either the throttle body sensor or the "learning" capability of the gas pedal sensor that needs to be reset. If it's the throttle body sensor, you'll have to replace it, but if it's the gas pedal, you can do a reset of the ecu and see if that works...

Then again, if that doesn't fix it, you could paint it CB and fix it..... :)

[rh_334]

If a scanner isnt handy the code can be cleared by disconnecting the batt, for 5 min

itll clear the code but wont reset anything else, and if he disconnects over night it could lose his tune since he has an Osiris Flash

[BRAD@ZSOLUTIONS]

i forgot about that. It may reset its self once the part is replaced and the ecm dosent see the bad signal. If all else fails bring it to me and i can try with my scanner. My consult is being repaired, but i belive this other scanner will work

[BRAD@ZSOLUTIONS]

I've looked around, and I think Brad may be right. It's either the throttle body sensor or the "learning" capability of the gas pedal sensor that needs to be reset. If it's the throttle body sensor, you'll have to replace it, but if it's the gas pedal, you can do a reset of the ecu and see if that works...

Then again, if that doesn't fix it, you could paint it CB and fix it..... :)

Ive not seen but one sensor on a gas pedal bad. The tps is intagrated into the throttlebody so it gets replaced as one

[rh_334]

Ive not seen but one sensor on a gas pedal bad. The tps is intagrated into the throttlebody so it gets replaced as one

hmm thats not quite right on a Z33, the TPS can NOT be on the Throttle body, its a Drive By Wire system. It has to have a Throttle Position Sensor ON THE PEDAL to interpret where the pedal is. It is unlike the Z32 cable system where the TPS is on the TB.

[BRAD@ZSOLUTIONS]

hmm thats not quite right on a Z33, the TPS can NOT be on the Throttle body, its a Drive By Wire system. It has to have a Throttle Position Sensor ON THE PEDAL to interpret where the pedal is. It is unlike the Z32 cable system where the TPS is on the TB.

I know its a drive by wire system. Hes got a bad throttlebody or a bad cam sensor. Usually the car wont or is hard to crank with a bad cam sensor. Pusihing the gas pedal and a no go is usually the throttlebody. Let me know what you find. Not having the car at the shop with a scanner on it and watching info on there this is a guessing game. Im sorry to butt in

[rh_334]

http://www.350zmotoring.com/forums/350z-problems-troubleshooting/54118-p2135-tps-pedal-position-sensor-switch-b-voltage-correlation.html

well in this thread they had the same prob and in some cases the TPS solved it and in other the Throttle body, i believe it is the Throttle body also BUT the only way to be sure is take it where it was tuned and get him to hook up to cipher and see if the Voltage from the TPS is .8v at idle and 5.1v at WOT and if so then you KNOW that it is the TB, and i that thread they say that they were charged ~100 to install the TB, but IMO its not even worth $20! its a 5min job

[rh_334]

updates?

[04LemansZ]

updates?
Taking it to James Friday to get a Cipher read on the TPS voltage and going from there.

[rh_334]

Taking it to James Friday to get a Cipher read on the TPS voltage and going from there.

cool keepus updated

[04LemansZ]

Question:

The car seems to run fine most of the time, so if we hook it up to Cipher won't the voltage reading look accurate if the car is not acting up, even if it is indeed the problem?

I guess I am not seeing how Cipher is going to prove or disprove that its the TPS.

[rh_334]

Question:

The car seems to run fine most of the time, so if we hook it up to Cipher won't the voltage reading look accurate if the car is not acting up, even if it is indeed the problem?

I guess I am not seeing how Cipher is going to prove or disprove that its the TPS.

even if the car is running right it SHOULD still show that the TPS voltage is surging,

what was the outside temp when it went into limp mode? and was it warm inside the car yet?
because bad sensors usually REALLYactup when cold

[04LemansZ]

even if the car is running right it SHOULD still show that the TPS voltage is surging,

what was the outside temp when it went into limp mode? and was it warm inside the car yet?
because bad sensors usually REALLYactup when cold
I don't remember the temp the first time it happened, but it was probably chilly and the inside of the car was warm.

Last time it happened it was cold, because it was earlier this week, but I had been driving with the heat on long enough that the inside of the car was warm.

[rh_334]

I don't remember the temp the first time it happened, but it was probably chilly and the inside of the car was warm.

Last time it happened it was cold, because it was earlier this week, but I had been driving with the heat on long enough that the inside of the car was warm.

well if the voltages seem fine then it will increase that chance that it is the Throttle Body their is no real way to be 100% sure that i knowof

[rbruditt]

take it to sharif and get twins, that will fix your problem.

[rh_334]

take it to sharif and get twins, that will fix your problem.

why sheriff? so he can be homeless and have twins?

[BRAD@ZSOLUTIONS]

put a throttlebody on th car and be done with it. The code is for the tps which is intagrated into the throttlebody. Id be really suprised if its the pedal sensor. Why not take the car somewhere, leave it with them till they (with a scanner on it) can see what the issue is. I dont understand. Also the tps recives the signal from the pedal sensor and moves throttl plates from there. Later, let me know

[04LemansZ]

put a throttlebody on th car and be done with it. The code is for the tps which is intagrated into the throttlebody. Id be really suprised if its the pedal sensor. Why not take the car somewhere, leave it with them till they (with a scanner on it) can see what the issue is. I dont understand. Also the tps recives the signal from the pedal sensor and moves throttl plates from there. Later, let me know
Because I don't have another car to drive around while it's at the shop and I'm not paying for someone to replace something like a throttle body that I can replace.

[rbruditt]

why sheriff? so he can be homeless and have twins?

if he took it to the sheriff i dont think he would be homeless or have twins :cmonster:

[rh_334]

if he took it to the sheriff i dont think he would be homeless or have twins :cmonster:

well he must have alotof $$ sittin around, i know id be homeless if i had to throw away 25k on a 10k job

[rh_334]

put a throttlebody on th car and be done with it. The code is for the tps which is intagrated into the throttlebody. Id be really suprised if its the pedal sensor. Why not take the car somewhere, leave it with them till they (with a scanner on it) can see what the issue is. I dont understand. Also the tps recives the signal from the pedal sensor and moves throttl plates from there. Later, let me know

you cant take it to just anybodyor you'll loose a $500 tune, and BTW the TPS it LITTERALLY on top of the pedal so i still am not understanding how your saying that changing the throttle body would replace the TPS also:usure:

[John@Z1]

I would let you try one out if you came up here. But the problem doesn't happen enough to test it out.

[DbDragStar]

you cant take it to just anybodyor you'll loose a $500 tune,



how do the 350Z's ECU work? im guessing its not an EPROM kind of memeory?

[rh_334]

how do the 350Z's ECU work? im guessing its not an EPROM kind of memeory?

what me and david have are just Reflashes on the OE ECU, so something like clearing codes with scanners or leaving your batt disconnected for several days can erase the tune

[04LemansZ]

Got the throttle body replaced today.

[rh_334]

Got the throttle body replaced today.

:crossfingers:

[DbDragStar]

Got the throttle body replaced today.

so who didi it and how much did it cost

[04LemansZ]

so who didi it and how much did it cost
I did it and I didn't charge myself anything to do it :cool: The throttle body itself was $208 or something with tax, but I can take the core back and get $40 back.

[rh_334]

I did it and I didn't charge myself anything to do it :cool: The throttle body itself was $208 or something with tax, but I can take the core back and get $40 back.

DIY FTW!:cool:

[04LemansZ]

Took the core back today and got my $40.