New ZR1 owner-timing & sparkplug question - ZR-1 Net Registry Forums

90_ZR1 · 11-01-2016

I just got my first ZR-1 (1990) last week and drove it for the first time this evening.
It doesn't idle too badly, but misfires badly when driving. My first question is what sparkplugs are recommended. I pulled one plug and it's an AC Delco 41-800. I saw another post where someone had 41-620's.
I would also like to know if the timing is adjustable, and what it should be if so.
Any advice appreciated.

11-01-2016	#1
90_ZR1 Join Date: Nov 2016 Location: Iowa Posts: 12	New ZR1 owner-timing & sparkplug question I just got my first ZR-1 (1990) last week and drove it for the first time this evening. It doesn't idle too badly, but misfires badly when driving. My first question is what sparkplugs are recommended. I pulled one plug and it's an AC Delco 41-800. I saw another post where someone had 41-620's. I would also like to know if the timing is adjustable, and what it should be if so. Any advice appreciated.