Hi All,

 

My Zed has decided to start cutting out randomly at while in Neutral or Park. Also when I select drive, the revs dip and occasionally it cuts out.

 

So i decided to let it tick over and roughly every 30 seconds or so, the revs climb slightly then go a little erratic and then the engine stops. Has anyone seen this before?

 

Cheers all. Hope youre all enjoying the sun!

Dave

Sounds like a TPS or CAS problem

Need more information really. Could be lots of things, what diagnostic stuff have you done?

Need more information really. Could be lots of things, what diagnostic stuff have you done?

 

I haven’t done any diagnostics, I’m new to the 300 pretty much and fluffing things as I go.

 

 

Sent from my iPhone using Tapatalk

I haven't driven an auto but don't you load the engine a little bit in drive so a rev dip would make sense? I could very well be wrong there.

 

Does it drive alright? I've had many faults on my manual where it is "falling through" idle. So at roundabouts and stuff it has such a fragile idle it stalls in neutral.

 

That is normally a boost or vac leak with mine.

 

But it could be a lot of things.

I haven’t done any diagnostics, I’m new to the 300 pretty much and fluffing things as I go.

 

 

Sent from my iPhone using Tapatalk

 

If I had more time I’d say bring it over but I don’t at the moment. Do you own s multimeter?

 

- - - Updated - - -

 

I haven't driven an auto but don't you load the engine a little bit in drive so a rev dip would make sense? I could very well be wrong there.

 

Does it drive alright? I've had many faults on my manual where it is "falling through" idle. So at roundabouts and stuff it has such a fragile idle it stalls in neutral.

 

That is normally a boost or vac leak with mine.

 

But it could be a lot of things.

 

Yeah, that’s not right.

Have a multimeter primes and ready for instruction.

 

Thanks for the offer of bringing it over. Would be good to meet up with more Z people.

 

 

Sent from my iPhone using Tapatalk

Check the connection to the idle control valve (top back end of intake manifold), check the TPS is set correctly, check for air leaks.

I had similar recently with the rev drops and cut outs - fixed it by cleaning out the throttle body and cleaning the contacts on the coolant temp sensors.

First thing you can do is clean and check the connections.

ECU temp, CAS, PTU, idle control, TPS etc etc.

Do a boost leak test.

Check timing and fuel pressure.

Check the TPS and set the base idle.

Check the MAF.

Lots to check and a real good afternoon of knobbing about. Alternatively you could book yourself in with Jimmer for a health check...

http://twinturbo.net/nissan/300zx/forums/technical/view/922678/The-6-Ps-Proper-Preparation-Prevents-Piss-Poor-Performancegt.html

Good advice from Steve :thumbup1: Could definitely be a vac leak, it doesn't take much for them to run badly.

First thing you can do is clean and check the connections.

ECU temp, CAS, PTU, idle control, TPS etc etc.

Do a boost leak test.

Check timing and fuel pressure.

Check the TPS and set the base idle.

Check the MAF.

Lots to check and a real good afternoon of knobbing about. Alternatively you could book yourself in with Jimmer for a health check...

http://twinturbo.net/nissan/300zx/forums/technical/view/922678/The-6-Ps-Proper-Preparation-Prevents-Piss-Poor-Performancegt.html

 

That’s Sunday’s knobbing sorted!

Thanks everyone! ??

 

 

Sent from my iPhone using Tapatalk