Damn spark codes

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Apr 10, 2021 | 11:52 AM

ja.mc44

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Joined: Feb 2021

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Damn spark codes

Yo guys,

2005 5.4 triton throwing p0358 code. Truck when I bought it was throwing three of these spark codes, so I put in new coil plugs and sparks but this keeps seeming to pop up for cylinder C. Any ideas where this is coming from?

I checked injector with test light and was get the pulsing light while truck was running so I'm assuming not injector... where to go from here. Is this going to be an issue with a driver in the cpu? Think I should take it to a shop to hook up a fancy reader get some readings? Thanks.

Apr 11, 2021 | 06:06 AM

projectSHO89

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Joined: Jan 2004

Posts: 19,767

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From: St Louis

"Cylinder C" is #3. If you have a fault there, you should be getting a P03X3 code where "X" is either a ) or 5, depending on the type of fault.

Apr 11, 2021 | 09:07 AM

kcducttaper

Tuned

Joined: Jun 2015

Posts: 344

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I got sick of my '99 5.4 misfiring and replacing those stupid plugs all the time. I swapped in MSD 'Blaster' coils and iridium plugs and haven't had an issue since.

Apr 11, 2021 | 05:12 PM

SuperDutyScaler

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Joined: Nov 2008

Posts: 8,450

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From: South Jersey

Quote:

Originally Posted by kcducttaper

I got sick of my '99 5.4 misfiring and replacing those stupid plugs all the time. I swapped in MSD 'Blaster' coils and iridium plugs and haven't had an issue since.

I dont see how because ANY spark plug or COP other than a real Motorcraft will throw codes or go bad on these trucks

Apr 11, 2021 | 09:03 PM