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What Plugs

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Old Jun 10, 2008 | 12:07 PM
  #1  
skiroulertx447's Avatar
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Joined: May 2008
Posts: 377
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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.
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Old Jun 11, 2008 | 12:33 PM
  #2  
skiroulertx447's Avatar
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Joined: May 2008
Posts: 377
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From: MN
Car: 86 Z28
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.42 posi
Re: What Plugs

So, no one ever replaces their spark plugs in these engines??
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Old Jun 11, 2008 | 12:39 PM
  #3  
Dale's Avatar
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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.
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