hi ya i have a problem with my 300, it dosent allways start when hot it was suggested that it could be the ptm sensor but when it done it earlier to day i checked to see if it had a spark and it did, plus the car is a series 2 so it has the better ptm sensor anyway, so im at a bit of a loose end with it, can anybody help???plus it sometimes crunchies going in to 5th gear especially under power, but all the other gears are fine is this likely to be the clutch or could it be the gearbox? thanks...

sorry i mean ptu sensor not ptm

What year is your 300zx.... Im sure series 2 also had series 1 PTU.

 

Does the PTU have alloy fins on it?

its a 1995 m reg,no it doesent its defently the series 2 ptu sensor

Ah ok, right, by any chance it doesn't have a mines ecu?

i dont no,why???

Mmm.. think a bit more info needed as you may end up getting red herrings here with too little info of the fault.

 

1) Does start ok when cold Yes / No

2) Does the warm engine fail to start when switched off for a few minutes or over 1 hour

3) Does it start once cooled down over say 2 hours Yes / No

4) Does it start with a splutter and then rev and clear Yes / No

5) Does it smell of petrol when failed to start ( before trying ) Yes / No

 

Let me know the answers and can point you in the direction I am thinking just want the confirmation on those q`s.

 

Jeff TT

1)yes

2)yes

3)yes

4)no

5)no

hope you can help

Sounds like PTU to me matey. Get yourself a series II PTU.

 

Just re-read the post soz.

 

Al.

As for the gearbox crunching in 5th.........

 

Mine does it too matey!! Don't worry.

 

Al.