About spark plugs..

[gasp1200]

Why my 1990 ZR1 eating spark plugs..??

[Racinfan83]

Define "eating?...

[Dynomite]

Originally Posted by gasp1200

Why my 1990 ZR1 eating spark plugs..??

Welcome to the Forum

A photo of an eaten spark plug would be informative
Also.....what Brand/Number are the Spark Plugs that are being eaten?

[gasp1200]

I mean it feels like that car eating spark plugs..i have tested acdelco 41-602 and those works only few weeks then i tested acdelco platinum 41-913 and same thing. NGK BKR6E works about few months but then the car starts again misfire and hesitate. So that kind of problem i have with this Z..

And i'm sorry about my bad english..i'll try to do my best

[Dynomite]

I would suggest that your fuel ratio (rich or lean) may be causing plug issues......and a photo of a plug would be of interest.

It would also be of interest how long this has been going on and if you changed some other component (added a new chip or using different gas for example) when this issue with plugs began.

Did your ZR-1 "not eat plugs" at some point

I am not a plug person and am not familiar with those plugs as I use NGK Iridium BKR5EIX

You English is fine

[mike100]

Is this occurring in all cylinders?

[XfireZ51]

What are u gapping them at?

[ZRapid-1]

This website has very good pictures of various spark plug conditions.
http://www.autolite.com/media/11838/plugtips.pdf

Post which one of the examples most closely match your sparkplugs. Then we can zero in on the root cause.

I hope that the "eating" is not detonation.

Also, 91 octane (US) fuel is required.
Note that octane measurements are different between the US and Europe.

• Research Octane Number = RON
• Motor Octane Number = MON

The European octane rating is RON, whereas the US octane rating is an average of (RON+MON)/2.

So, US octane of 91 ((RON+MON)/2) equals EU octane of 95 (Research Octane Number = RON).

Kippis!