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2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
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Old 09-28-2010, 07:56 PM
soto8704 soto8704 is offline
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codes p0316,p0300,p0302,p0303

hey guys, I have a truck f150 v6 2004. it's giving me the codes p0316,p0300,p0302,p0303.

I check for spark on plug #1 did no have it, so I replace the ignition coil. With no luck. also replaced the plug wires, same result. What could cause missfire on cyl.#2 and cyl #3. Any ideas?
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Old 09-28-2010, 08:07 PM
Coskid Coskid is offline
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Well how many miles are on the truck and when was the last time (if ever) were the plugs replaced?

Also do you have the 4.6 or 4.2 V6?
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Old 09-28-2010, 08:09 PM
Greg B Greg B is offline
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P0300 is a random multible misfire detected. P0316 is misfire detected on startup (1st 1000 revs.) I would recommend getting or borrowing a powertrain and Emission Control shop manual and follow the diagnostic routine for the codes mentioned. As to what could cause the codes or misfires, there are a number of things that could be the cause. It possibly could be a bad coil, plug, boot, fuel injector, or even fuel pump. It could also be a problem with the wiring harness for those coils. The easiest and quickest way to diagnose the problem is to follow the routine in the shop manual. Fixing the problem should be easy. Finding it will take a little more effort.
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Old 09-28-2010, 08:43 PM
soto8704 soto8704 is offline
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4.2 engine. I replaced the ignition pack. I will replace spark plugs tomorrow. what 's bother me is that two cyl. missfired. do you now the firing order?
Thkx.
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Old 09-28-2010, 09:13 PM
Greg B Greg B is offline
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I do not know the firing order. That info is in the shop manuals.
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Old 09-28-2010, 11:21 PM
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the firing order for the 4.2L is

1-4-2-5-3-6
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Old 09-28-2010, 11:21 PM
 
 
 
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