Got an issue with my Z already lol, I don't think it's much and there must be a theory behind it so would be greatful if you could throw some ideas up :)

 

It's refusing to start. The first turn of the key and it starts but cuts out after a second. It then doesn't fire at all but I can smell fuel after a little cranking.

 

I figured out today that if you start it with the throttle open it starts and runs with no problem, but as soon as the revs die down it cuts out and resorts to not firing again.

 

As its a late model there's no ecu diagnostic light and I've not got hold of an OBD2 reader yet so can't check for codes. But there must be a reason why it runs with the throttle open but my limited knowledge isn't enough to work it out lol. Any ideas?

 

It started fine when I collected it, when i stopped for fuel, stopped to pick the boy up from granny's, moved the car the next morning, but it was that afternoon when it wouldn't start.

It's probably in shock from having a wash!!!

It's probably in shock from having a wash!!!

:lol: pmsl :lol:

It's probably in shock from having a wash!!!

 

:lol: yeah good point! I did change a blown tail lamp bulb between it starting and not starting - maybe I cursed it :(

IACV? plugged in blah? im not zed tech guru but probably first place id look

IACV or TPS.

Throttle bodies could probably do with a clean. If the cars been down to Albania a few times, and filters not been changed ever, then the throttle bodies could be full of crap.

FULL service required. Reckon it's the TPS too. Got a multimeter?

I have got a multimeter yes, the tps is different to any I've seen before, some big bulky hitachi thing. There's a way of checking isn't there?

I think it's payback for all that bragging you were doing.......something I'd never do !!!

 

Next time it does it, remove the fuel pump fuse and turn it over, then replace fuse and give it another go.

PM Gio, he'll know how to check it on late-spec cars. I am not too ofay with the TPSs on them I'm afraid.

PM Gio, he'll know how to check it on late-spec cars. I am not too au fait with the TPSs on them I'm afraid.

 

Couldn't resist, mate! :lol:

Couldn't resist, mate! :lol:

 

PMSL!

 

Andy what do you think it might be that's causing it? I'm still within my rights to brag as I still love the car even if I can't drive it lol

*****cks. I speak French too - I have no idea what happened there. EPIC Brain-fart moment! Putain de merde!

Surely it takes more brainpower to try and spell ofay!

No, it takes no brain power to write something phonetically, that's the point! I have an odd brain anyway - most of the time it fails to engage. I need a new one.

Do not change the brain, Si... You made me laugh! :laugh:

It's not OBDII as I posted on the other thread. Most it might be is to have an OBDII connector but should have Consult behind that. At least that's what ECUTalk say and my Series 6 has both normal 300ZX Consult and normal consult connector. So a normal Consult/ConZult/ECUTalk whatever should do. It also means you can use the normal ECU flashing led error code check if you don't have easy access to one of the gadgety things :)

As its a late model there's no ecu diagnostic light

Oops just read this (must have been distracted by FunkySi's French spelling) - never bothered to check mine, didn't know late models didn't have a diag ligh on the ECU.

One thing to keep in mind is although its a later series zed it has all the same issues as the earlier ones and most of all the same causes of engine issues.

 

The ecu is a 16 bit but is not OB2 compliant so will be wasting your money buying one of those, it comes back to the good old ConZult, if you have one of those thats the first place to start, check afm voltage, tps setting, injector duty and timing, this is just the start point to clear these out of the equation.

 

Also air/boost leaks, mixed up vacuum pipes fuel filter and plugs all can have running issue effects, even a blocked air filters and the usual temp sensor connection, start with the basics and move on from there, also check the fuel damper, they have a habit of leaking fuel into the plenum when shut down causing a flooding issue.

 

If you do not have a ConZult you can still use the inbuilt diagnosis for code checks by watching the engine light on the dashboard rather than the ecu led, but remember they are basic codes and often can be meaningless without other information.

 

 

Jeff TT

Edited February 25, 201411 yr by JeffTT

Oops just read this (must have been distracted by FunkySi's French spelling) - never bothered to check mine, didn't know late models didn't have a diag ligh on the ECU.

 

Sorry mate didn't realise you had commented on OBD2 on the other thread. No flashing light on later models. Was hoping for at least a flashing light on the dash... But no nothing, so need to either get conzult on it or a code reader.

One thing to keep in mind is although its a later series zed it has all the same issues as the earlier ones and most of all the same causes of engine issues.

 

The ecu is a 16 bit but is not OB2 compliant so will be wasting your money buying one of those, it comes back to the good old ConZult, if you have one of those thats the first place to start, check afm voltage, tps setting, injector duty and timing, this is just the start point to clear these out of the equation.

 

Also air/boost leaks, mixed up vacuum pipes fuel filter and plugs all can have running issue effects, even a blocked air filters and the usual temp sensor connection, start with the basics and move on from there, also check the fuel damper, they have a habit of leaking fuel into the plenum when shut down causing a flooding issue.

 

If you do not have a ConZult you can still use the inbuilt diagnosis for code checks by watching the engine light on the dashboard rather than the ecu led, but remember they are basic codes and often can be meaningless without other information.

 

 

Jeff TT

 

Thanks for the technical reply Jeff, will give it a good going over at the weekend and start working through the list. I did wonder about a light on the dash as the ecu still has the turn screw for engaging diag mode. It's just strange that it drove back with no issues whatsoever and started that morning then went tits up in the afternoon.

It's just strange that it drove back with no issues whatsoever and started that morning then went tits up in the afternoon.

 

Thats zeds for you!!

 

Jeff

Thats zeds for you!!

 

Jeff

 

Haha! Amen to that :)

Andy what do you think it might be that's causing it?

 

Not just the same as yours as mine does not die once it as fired.

 

I'm currently sorned and have parts missing but in a few days I'll be able to try it again. Last summer it would crank and start fine from cold and run perfect, however should I make a journey or just move it around on the drive and then turn off, it would crank and crank but not start if I was to try and start again within 5 mins of shutting off, if it was left for say 20 mins and I have had a brew it would start no problem.

 

I have changed the ptu and also at the back of my mind I am thinking my battery is on it's way out as it soon loses it's charge or woomph, because with a really strong and lengthy crank with a booster attached it did help starting when normally it wasn't for going.

 

I have not been able as yet to test the fuel pump removal procedure.

Not just the same as yours as mine does not die once it as fired.

 

I'm currently sorned and have parts missing but in a few days I'll be able to try it again. Last summer it would crank and start fine from cold and run perfect, however should I make a journey or just move it around on the drive and then turn off, it would crank and crank but not start if I was to try and start again within 5 mins of shutting off, if it was left for say 20 mins and I have had a brew it would start no problem.

 

I have changed the ptu and also at the back of my mind I am thinking my battery is on it's way out as it soon loses it's charge or woomph, because with a really strong and lengthy crank with a booster attached it did help starting when normally it wasn't for going.

 

I have not been able as yet to test the fuel pump removal procedure.

 

Check the cas is working ok.