Harry A Posted September 30 Share Posted September 30 Hello people, Quite recently bought my first 350z. It is an import but has lived most of its life in the UK. Recently having some problems. Rough cold start, rough idle and acceleration juddering. Here some notes I have bullet pointed in case this helps anyone. Judder always happens between 2000 - 2250 RPM Cold start sounds rough, idle sounds rough. Car has been mapped before (believe to be back around 2019 by a previous owner) Problem has occurred since last battery started dying. (Could just be me overthinking) Seems like it has started doing this every time is wet weather (could just be me overthinking) Immobiliser has recently been playing up, not sure if this could play a part in it. I have got videos but won’t let me post. Quote Link to comment Share on other sites More sharing options...
G1en Posted September 30 Share Posted September 30 I had something similar (the 2-2.5k revs stuttering), took it to horsham developments who said it was the VVT Solenoids i think, they stick over time. I had 3 options, 1- replace with new at a stupid price of like £2k 2- get some used ones from Zmanalex on here or a breaker at much more reasonable £300 ish 3- get it remapped again and mapped out (compensated for) which i opted for It could also need the idle relearn doing (videos on youtube) and/or throttle position reset as these are a common thing after battery dying Yours may not be same issue but i would guess if you take it to horsham or abbey motorsports they can plug into obd/ecu and see whats happening Quote Link to comment Share on other sites More sharing options...
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