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Discussion Starter #1
Does anyone have the diagram for the 92 fleetwood FWD 4.9 engine spark plug firing order.

Thanks!

ps. I think I may have mis-wired a couple plugs.
 

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1998 Seville STS / 2013 Chevrolet Impala
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1,889 Posts
1-8-4-3-6-5-7-2

Edit: Here's a diagram for all GM V8's of that firing order. Remember to rotate the diagram 90 degrees counter-clockwise because our engines are transverse.
 

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1998 Seville STS / 2013 Chevrolet Impala
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It should also be for the 4.1, because that's the classic GM firing order. My dad's Z/28 and Corvette were the same as well.
 

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92' Sedan DeVille "Gold Key Edition"
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37 Posts
He guys,

i wanna check my spark plug wire's, i think one is bad (or one spark plug), i know the best way to check is, to run the engine and remove one wire after one (of course put it back before remove another one). My question is, do i have to remove the wire on the spark plug or can i remove it on the spark coil too, it would be a lot easier.
 

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2010 DTS
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87,544 Posts
Doesn't matter which end you pull, but be sure you are wearing rubber gloves or standing on a rubber mat or using insulated pliers or something.
 
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