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5851a · 03-07-2021, 10:18 AM

When Ford first went with FI people would still pump the gas while cranking engine. The plugs looked brand new but would never fire again. Ford said they were chemically fouled. Couple of plugs on crown vics were hard to get to so mechanics would replace 6 and take car on long test loop to get hot, then they would come back and replace the 2 that were to hard to get the first time.

03-07-2021, 10:18 AM	#5
5851a Senior Member Join Date: Oct 2014 Location: NE Iowa Posts: 1,665	Re: Spark Plug Fouling When Ford first went with FI people would still pump the gas while cranking engine. The plugs looked brand new but would never fire again. Ford said they were chemically fouled. Couple of plugs on crown vics were hard to get to so mechanics would replace 6 and take car on long test loop to get hot, then they would come back and replace the 2 that were to hard to get the first time.