Limp Mode, Help?

[itshimdazza]

Help needed urgently...........

Guys i believe that my car has gone into limp mode , ie not revving past 2000rpm.

Now I went to Scott's place and we did the solder trick on the socket of the AFM (Z32) and swapped it with another one he had at the time and still didnt fix it . we suspected maybe that AFM may of been faulty. Strangely this wouldnt happen cold and would only occur when the car was warmed up and ONLY when restarted ie drive for xkm and then stop and then restart the problem would occur (but not always).

Anyway its been fine for a week or too and in the meantime i bought another z32 AFM as a spare just in case. I decided to change it and it happened last night on the way home (car not warmed up)

Now it happend first time this morning again fine for about 1 minute getting out of garage and up the street and the friggin thing is doing it again....

Does anyone have any idea what I can do as this is driving me NUTS!!!!!!!!!!!!!!!!!!!

Regards,

Draren

Edited June 16, 2012 by itshimdazza

[kiwi laurel]

wats it sound like on 2000rpm? like its limiting? or like its missing?

[itshimdazza]

It gets to 2000rpm then cuts and drops done to somthing like 1000 imagine brp brp brp if i hold it WOT, ie it would kill then climb back up the kill etc

Oh also it dosnt matter if your in gear or just revving it in neutral

darren

Edited June 16, 2012 by itshimdazza

[itshimdazza]

visited Scotty again and resoldered in a new AFM plug as the old one had residue (oxidation) on contacts but didnt fix it.

Unpluged the TPS and hello......it can rev past 2000. Looks like the TPS maybe shot. This may be a give away due to the car idleing high most of the time around 1700-2000...

off home and swap it over with my spare and will let you know how it goes... I was always suss with it anyway as the vollage was always high in it 2.5v or there abouts on idle...

Dazza

pm'd artz & sunkist who were over at Scotties....

Edited June 16, 2012 by itshimdazza

[Sunkist]

How'd you go ??

[scotty nm35]

Seems the TPS voltage was 2.3 volts (minimum) and this would cause the ecu to go into limp mode randomly. He changed the TPS and it runs fine again, tps is now 0.5v.

[ARTZ]

Haha, looks like we both learnt important lessons in fault diagnosis today..

Just start unplugging shit...

[itshimdazza]

yeah ,

sorry for the late reply (went out) looks like the TPS can infact cause the car to go into limp mode. My ecutalk confirmed the voltage at idle some 0.5volts whereas before was somthing in the 2.5volts. so thanks heaps guys .Looks like we will have to all remember this in future ....

Check AFM ...

Check TPS

if you are limping....

regards,

Darren

[Sunkist]

yeah , sorry for the late reply (went out) looks like the TPS can infact cause the car to go into limp mode. My ecutalk confirmed the voltage at idle some 0.5volts whereas before was somthing in the 2.5volts. so thanks heaps guys .Looks like we will have to all remember this in future .... Check AFM ... Check TPS if you are limping.... regards, Darren

atleast you found it.. how was driving home with it unplugged? lol no issues?

Haha, looks like we both learnt important lessons in fault diagnosis today.. Just start unplugging shit...

"today kids, we are going to learn how to fix things by potentially making them worse"

[R31Nismoid]

If you have a Z32, do you have a PFC?

The hand controller would have told you what sensor was at fault. It logs it even when the car stalls so it's easy to workout whats farked

[itshimdazza]

R31Nismoid,

Nay dont have powerfc .

I have a Nistune so no display. It only comes up on my ecutalk which shows several voltages temps etc.

There was no error codes except for this "Fuel Temp Sensor" which I really dont have any knowledge what it is or even what it does

Dazza