I need help, i mean help.

 

I lost control of my 300Zx TT :x: , i don't really want to go into details, because i'm not proud of it :nelson: . But i got really lucky and went into various bushes but caused no real damage to the car.

But the car will not run properly any more, theirs no throttle response (it won't go faster than 10mph and then the engine stalls), it blows black smoke out of the exhaust. The revs idle between 400 to 1700. It is over fuelling and i don't know why, i looked to see if there is anything obvious but everything seems in-tacked. I done a diagnostic to the ecu, a fault came up on the temperature sensor, changed that but made no difference.

The car was totally fine before i went off-roading in it.

Can any one help? Cheers Inti :confused: :confused: :confused: :bow: :bow: :bow:

i think running rich can be down to faulty o2 sensors. did you go over anything that may have dislodged or damaged them.

 

only thing is i would have expected that to come up on a ecu diag

 

seems a bit excessive for just that tho

 

hope you have some luck mate!

If there is no information coming from the Temp sensor the car runs like a big bag of shit.

 

It most probably is the temp sensor, but now the signal is not reaching the ECU. Either a bad connection or some how the wire has split some where.

sounds like either the AFM is knackered or disconnected, or more likely you've split an intercooler (or pipework) and leaking metered air, hence the black smoke as the ecu puts in fuel for the air it thinks is going into the engine.

Try this mate.

 

If you have got a big boost leak and you're losing metered air, it will run like a bag of crap. Try disconnecting the AFM and see how it runs. Without the AFM the car will run half reasonably based on the input from the TPS. It won't go over 2,500 rpm though (I think that's the rpm value).

 

If it starts to run a lot better with the AFM disconnected then the fault lies in the AFM, the AFM wiring or a big boost leak. I would suspect the latter based on your off road excursion.

cheers for the response, it has given me couple of ideas to try. See what happens aahhhhhhhh!!