Need help Reading sparkplugs
Thread Starter
Pro
Joined: May 2001
Posts: 524
Likes: 59
From: watchung N.J.
Need help Reading sparkplugs
I just rebuilt our 350 ci. engine and it has 1000 miles on it. I,m not getting
consistant plug conditions. Some on # 2,8,7 are bright white while the other
cylinders are running more dark brown. I know that the white ones are either too hot or lean and that the brown are too rich, but why the big difference?
The ignition is H.E.I. with all new components,cap,rotor,wires etc. The cam is
a comp cams solid lifter and the valve lash is correct, The intake is a Lt-1 alum.
hi rise, and the carb is a Holley 750 d.p. with 70 main jets. any help would be appreciated.
consistant plug conditions. Some on # 2,8,7 are bright white while the other
cylinders are running more dark brown. I know that the white ones are either too hot or lean and that the brown are too rich, but why the big difference?
The ignition is H.E.I. with all new components,cap,rotor,wires etc. The cam is
a comp cams solid lifter and the valve lash is correct, The intake is a Lt-1 alum.
hi rise, and the carb is a Holley 750 d.p. with 70 main jets. any help would be appreciated.
Thread Starter
Pro
Joined: May 2001
Posts: 524
Likes: 59
From: watchung N.J.
Re: Need help Reading sparkplugs (ZD75blue)
No, they,re new world products cast iron heads, I think I found the problem I started pinching off vacuum hoses and noticed the headlamp hoses had a leak,
and I traced it to the headlamp relay canisters. $69.00 a piece what a rip-off,anyway I am going for a test ride and will let you guys Know How I make out. Thanks-
and I traced it to the headlamp relay canisters. $69.00 a piece what a rip-off,anyway I am going for a test ride and will let you guys Know How I make out. Thanks-
Melting Slicks
Joined: Apr 1999
Posts: 2,675
Likes: 13
From: Sudbury MA
Re: Need help Reading sparkplugs (spokewrench)
I'm lost.
What do the headlamp vacuum hoses have to do with the sparkplugs and if it is affecting how it runs, why not affecting ALL plugs and just some.
I'm asking becuase I would like to learn, not being a wise a--.
Thanks,
What do the headlamp vacuum hoses have to do with the sparkplugs and if it is affecting how it runs, why not affecting ALL plugs and just some.
I'm asking becuase I would like to learn, not being a wise a--.
Thanks,
