Tazzy

Thanks, I did not read the ad, just looked at the pictures like a typical man !! :blushing:

It does look nice in the pictures, does anyone know what steering wheel that has, been looking for something aftermarket and that does look nice to me.

Plus I really would not want to be driving a 300zx around with overheating problems, the stock temp guage is notoriously rubbish and the engine easily damaged.

A much better explanation of what I was trying to say, not sure there is much point in doing all this and using a duff radiator, if you think this one is blocked and the other leaks probably best to either get a new one, second hand can get you out of a mess but is usually a false economy in the end.

I still think you have air in the system, if its not loosing water at any of the pipes I doubt air is getting in there so you just need to get the air out thats already in there, I think you said about raising the car earlier in the thread so you already know to have the front end higher, if it was me I would drain the whole system, fill it up slowly whilst the front is raised, run the engine and if needed gently squeeze the pipes to help any air get out of the system.

You can check the thermostat by putting it in a saucepan of water on the hob, heat it up and see if it opens at the correct temperature, that will either rule out the thermostat or show thats the problem, my first thought would be an air lock in the system as thermostats are pretty reliable and you have drained the system recently.

My own personal preference would be to just use the UK milometre without changing it, this is based on the fact that once you change them the numbers never line up 100%, most people would not noticed but someone in the know would be able to tell its been tampered with, also these cars are all getting on in years and not many imports have guarenteed mileage on arriving anyway so who knows what it might actually be.

Update in case anyone searches for this and needs help. As stated I ruled out every other option so as Jeff stated it was a case of rewiring the TPS which I did and cured the problem straight away this alone is a fairly simple task, at first glance the wiring looked to be in ok condition but I found that while the engine was running if I moved the ECU a little the engine began to run very badly, it seemed very likely that somewhere in the harness between ECU and bulkhead there were problems, this became even more apparent while driving, with everything bolted back in driving over a bump would cause running issues, thinking it was possibly a bad connection somewhere I went to clean up / check all connections and this is where I found out how bad the harness condition was and decided to fit a new EFI harness, expensive but very much worth it.

I have changed a few sets of clocks over and found that when you do that the car speed reads in MPH but if you use the origional milometre it will still go up in Kilometres so you would need to use the UK milometre and adjust it to read the correct mileage.

You could take each dial out from your origional unit and put them into the UK housing and it will work perfectly with no need to solder new plugs, as for changing the mileage its very simple if you look at it once taken apart.

Got mine from Z1, thanks for the heads up on the connector, I have taken a good look and most connections seem pretty obvious, also not sure if they are all the same but mine did not have any labels saying which wire was for which cylinder so I have gone round with a multi meter and labelled them myself, even my old loom had the labels on each cylinder from 20 years ago.

Yes new EFI harness going on in the morning !

The good news is it plain sailing from here on, all the connectors are cleaned, just a case of threading the blue connector through the bulk head, connecting everything up under the bonnet and fingers crossed it fires up first time :scared:

Correct and I never want to do one again !

Certainly does, I spent the whole time upside down in the passenger footwell with my arms bent in ten places to get behind the Air con unit.