What Plugs
Thread Starter
Member
Joined: May 2008
Posts: 377
Likes: 0
From: MN
Car: 86 Z28
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.42 posi
What Plugs
What are the spark plugs supposed to be on my 86 Z28 305 TPI. It has autolite and ac delco plugs in it right now, I'm pretty sure the ac/delco plugs are r45ts, but when I went to the auto store they said r43ts. The plugs that I bought because they were on sale were rv15yc4. I hope those are the right ones.
Another thing is today I was driving down the road going about 55-65 and stepped on the gas and noticed the "service engine soon" light came on, but it turned off after a few seconds.
Another thing is today I was driving down the road going about 55-65 and stepped on the gas and noticed the "service engine soon" light came on, but it turned off after a few seconds.
TGO Supporter
iTrader: (12)
Joined: Jun 2002
Posts: 6,819
Likes: 3
From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
Re: What Plugs
My source shows 43ts.
The champion ones are correct as well. Make sure they are gapped correctly.
The champion ones are correct as well. Make sure they are gapped correctly.
Thread
Thread Starter
Forum
Replies
Last Post
wigmobile
Electronics
5
Feb 26, 2025 02:56 PM
89 formula TPI
Tech / General Engine
10
Sep 7, 2015 11:06 AM





