Hi all..

 

Noticed some hesitation/stutter under heavy load around about 5k revs onwards over the past couple of weeks and i think its getting worse.

 

I've got it into my head that its the spark plugs for some reason, i dont know when they were last changed anyway so will need to get them done i think..

 

I had had it in my n/a MR2 and i think that turned out to be the Rotor Arm, Dizzy Cap and spark plugs..could that be the same problem as my 300 TT? '90 Auto?

 

Thanks

Ed

....I had had it in my n/a MR2 and i think that turned out to be the Rotor Arm, Dizzy Cap and spark plugs..could that be the same problem as my 300 TT? '90 Auto?

 

 

Doubt it, the Z has no dizzy ;)

 

Checked the ecu for error codes? could be a number of things but check for codes first...

ah wont be that then...i could check the ecu yeah..but out of the many things that it could be. would shot spark plugs be one of them?

Possibly yeah. They aint cheap tho! They typically last ~60k miles so don't need replacing as often as some think ;) Obviously increased boost etc then their life will be reduced....

hmm id best take a look at a few things hadn't i really! thanks..

Doubt it, the Z has no dizzy ;)

 

Checked the ecu for error codes? could be a number of things but check for codes first...

My Z has a Dizzy!! It sit's in the Passenger seat most time's :shock: :wack: :D

No point just guessing until you have done the ECU test :

 

http://www.ttzd.com/tech/diagnostictech.html

or

http://www.twinturbo.net/ttnetfaq/FAQpages/ECUdiagnostics.html

 

Spark plugs are not the most likely cause. Coilpacks, Connetors, harness, PTU, temp sensor, vacumn leak are.

ok cheers chaps i'll check the ecu later

 

thanks

Could also be the TPS i guess, worth checking the looms from the CAS and TPS make sure they are clean and have good connections

whereabouts is the TPS now? the connector that goes into the throttle body on the right hand side if your looking at it from the front of the car ?

Save this link for future reference ;)

 

http://www.300zx.co.uk/forums/showthread.php?t=26120

thats great, cheers chaps - i'll let you know!

going to check the coilpacks later see that they are all on correctly..whereabouts are the injectors? are they something i can easily get to - to clean?

thanks again

Ed