Right many of u know by now my car don't rev over 5500revs, it just stops there.

 

5Mins ago took the car out to just clear away cobwebs, got back, stopped on my drive and about 10 seconds later it conked out. It wont restart. I will try it later when its had time to cool down or whatever.

 

Could this be a failed PTU? If it is could this be the cause of my troubles?

 

Reading a TVR mag some geezer said his car wouldnt rev over 5.5K due to nackered solenoid. Im not sure exactly what the PTU does but its in the same system as the ignition?

 

Thanks 4 any help.

Rob

:confused:

The PTU is brace of power transistors in a little finned box on the front of the cam cover (LHS from the front of the car) that amplifies the separate spark pulse signal for each cylinder coming from the ecu. The amplified pulse then goes to each separate HT transformer coil for each cylinder to make the high voltage needed to fire the spark plugs. - (At least thats how it looks to me)

 

I dont understand the failure mode for the PTU but I guess if any of the separate transistors breakdown then your sparks can collapse. Heat can break down a dodgy one that works OK when cold. The original PTU was dodgy and a USA recall changed many but not all of them. I guess if its lasted this long it must have been OK.

 

Also dodgy soldering or oxidation inside can fault them. Some electronics engineers can rebuild it with new transistors for you or buy the later one.

Your problem doesn't sound like a ptu prob to me, but it would be worth swapping one over with someone for a quick comparision. If you can't find anyone local to help you then I do have a spare that I could post.

How much 4 it andy?

Keep in mind my money's special and worth twice as much as the ordinary stuff!

It's not for sale as it's a broken one that I've fixed and I have no confidence that it will last.

"Late" models (Series 3 and on) had a different manufacturers PTU fitted, and this was also made available under recall in the US (but not here) and normally supplied/fitted as the replacement part by Nissan UK. The later part is made by Mitsubishi (as confirmed in my Series 3 model) and a search in the old forums may well find the part number - I think it had a different suffix to the earlier problem part.

 

A long winded story (sorry), but the unconfirmed piece of information is that it is the same part as fitted to the Mitsubishi GTO (GT3000) and available from a UK Mitsubishi dealer at a greatly reduced price to UK Nissan dealer. If one of the technical guys is able to confirm this, then this could be a quicker and equal cost alternative to ordering from the US?

 

Hope this helps.

Geoff

So Andy what do u want, just p&p costs? where are you, maybe i could pop round?

 

Thnks

Hi there

Im new here to this forum.

 

I know the PTU from the MMC 3000GT is difrent from the Z

if you were wondering.

Originally posted by Robtor

So Andy what do u want, just p&p costs? where are you, maybe i could pop round?

 

Thnks

 

Just email me your address.