Spark plugs and why the difference

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Dec 12, 2016 | 12:35 PM

#16

LARIAT 85

Cargo Master

Joined: Dec 2004

Posts: 3,362

Likes: 22

From: Florence, SC

Quote:

Originally Posted by NumberDummy

1980/89 Ford Light Truck Parts Catalog - Text Section 120 - page 27.

Look under the Ford basic number for spark plugs (12405) and see what it says: ASF-42

I believe you. But that is not what my Owner's Manual says.

I guess we are both right, and Ford can't seem to make up their minds on which spark plug to use.

Jan 9, 2017 | 04:28 PM

#17

Waldridge

Thread Starter

New User

Joined: Dec 2016

Posts: 8

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Ok...so just to close the gap here. The problem wasn't the plugs...but the lug...LUGHEAD that is. Either my friend or I had accidentally disconnected the 4 port vacuum connection on the passenger side. It wasn't until I did a "thorough" look over the entire engine did I notice it. Thanks you all for all the information and help!!